Journal articles: 'Mono ethanol amine'

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Bommel, Andrew van, Andrew Glennie, Danielle Chisholm, and Rama M. Palepu. "Dynamics of percolation and energetics in the clustering of water/AOT/oil microemulsions in the presence of ethanol amines." Canadian Journal of Chemistry 84, no. 3 (March 1, 2006): 412–20. http://dx.doi.org/10.1139/v06-011.

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Temperature-induced percolation in water/AOT/oil microemulsions in the presence of mono-, di-, and tri-ethanol amines have been studied using conductometric measurements. The percolation temperature of water/AOT/oil microemulsions depends on the nature of the alkanol amine added. Mono- and di-ethanol amines hinder the percolation process, while triethanol amine promotes the process. Percolation studies were also conducted with varying ω = [H2O]/[AOT] values and varying chain lengths of continuous oil phase (C6C10). The results indicate that increases in both ω and the chain length of the oil decrease the percolation temperature. The microemulsion systems have been analyzed in terms of percolation temperature, scaling equation parameters, and activation energies. The energetic parameters of the clustering process have also been determined employing the phaseseparation model. The influence of alkanol amines on the percolation phenomenon has been rationalized in terms of the changes in fluidity of the interfacial layer, the viscosity of the water micropool, and the attractive interactions of the microemulsion droplets. The influence of the alkanol amine additives on the stated parameters was discussed in view of the individual effects of the alcohol and amine moieties on the properties of water/AOT/oil microemulsions.Key words: microemulsion, percolation, conductometry, alkanol amine, surfactant.

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Mushtaq, Asim, Hilmi Mukhtar, and Azmi Muhammad Shariff. "Gas Permeability Study of Amine-Polymer Blend Membranes to Separate Carbondioxide from Natural Gas." Applied Mechanics and Materials 625 (September 2014): 704–8. http://dx.doi.org/10.4028/www.scientific.net/amm.625.704.

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The confinement and storage of carbon dioxide has been acknowledged as a prospective solution towards the greenhouse gas effect which in turn cause climate change. Proficient separation technologies are required for removal of carbon dioxide from natural gas streams to allow this solution to be extensively feasible. An emerging technology is the membrane gas separation, which is more dense, energy efficient and possibly more economical than older technologies, such as solvent absorption. Amine has a natural affinity for both carbon dioxide and hydrogen sulphide, allowing it to be a very effective removal process. In this context blending of glassy polymer that is polysulfone and amines, which are diethanol amine, methyl diethanol amine, mono ethanol amine in dimethyl acetamide solvent, flat sheet membranes were developed with desirable properties. Gas permeability study of PSU with amines, blend membranes were evaluated using pure gas CO2and CH4at different feed pressures.

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Chong, Nyuk-Min. "BIOLOGICAL TREATABILITY OF AMINE LADEN REFINERY WASTEWATER." Water Science and Technology 30, no. 3 (August 1, 1994): 21–28. http://dx.doi.org/10.2166/wst.1994.0054.

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Mono- and Di- hydroxyl amines are used in the desulfuration processes for refined petroleum products. The refinery wastewater treatment plant may be shocked by amine laden wastewater periodically, bringing operation difficulties to the biological treatment units. Data on the treatability, shock load behaviour and on long term system stability of biological treatment of amines are therefore required. Shake-flask test results showed that pure diethanol amine and diisopropanol amines have characteristics of persistent compounds. Each of the two compounds has a prolonged lag time when first inoculated with indigenous activated sludge. Acclimated activated sludge in a continuous flow reactor treated a feed of ethanol amine with a 93 percent COD removal and a 98 percent nitrification, but the system was unstable because amine caused a bulking sludge. By physical retention of the activated sludge, 550 mg/l influent COD of amines was treated to m1 average 50 mg/l effluent COD. Sludge yield was approximately 0.26 mg MLSS per mg COD. The activated sludge system withstood a chm1ge of feed to a real refinery wastewater laden with the; amine. A mean cell residence time above five (5) days should be maintained for safe treatment of; amine.

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Hilyati, Hilyati, Wuryaningsih Wuryaningsih, M. Nasir, Tasrif Tasrif, and T. Beuna. "THE DETERMINATION OF OPTIMUM CONDITION FOR THE SYNTHESIS OF ALKYL MONOETHANOLAMIDE FROM PALM KERNEL OIL." Indonesian Journal of Chemistry 4, no. 2 (June 9, 2010): 88–93. http://dx.doi.org/10.22146/ijc.21859.

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Synthesis of alkyl monoethanolamide from palm kernel oil was done by two steps reaction that are esterification and amidation. The esterification, that is the reaction between palm kernel oil and methanol with mole ratio of 1:3 using acid catalyst (H2SO4) 4 % at temperature 60 OC for two hours, results in methyl ester palm kernel oil. The methyl ester product was produced by amidation reaction on any variation of time, temperature, catalyst, catalyst concentration and ratio of the reactan. The best result of the synthesis (amide conversion of 98.15 %) was obtained at temperature of 160 OC for 6 hours with mole ratio of methyl ester palm kernel oil to ethanol amine (ratio of the reactan) 1:1 using KOH catalyst 0.5 % and H2SO4 catalyst 0.5 %. Keywords: alkyl mono ethanol amide, surfactant, palm kernel oil, esterification, methyl ester, emulsifier

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Kianfar, Ehsan, Vahid Pirouzfar, and Hossein Sakhaeinia. "An experimental study on absorption/stripping CO 2 using mono-ethanol amine hollow fiber membrane contactor." Journal of the Taiwan Institute of Chemical Engineers 80 (November 2017): 954–62. http://dx.doi.org/10.1016/j.jtice.2017.08.017.

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Lee, Jonathan, Toluwanimi Kolawole, and Pierrot Attidekou. "Carbon Capture from a Simulated Flue Gas Using a Rotating Packed Bed Adsorber and Mono Ethanol Amine (MEA)." Energy Procedia 114 (July 2017): 1834–40. http://dx.doi.org/10.1016/j.egypro.2017.03.1312.

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Fekri, Leila Z. "NiFe2O4@SiO2 @amino Glucose Magnetic Nanoparticle under Solvent-free Condition: A New, mild, Simple and Effective Avenue for the Synthesis of Quinazolinone, Imidazo[1,2-a]Pyrimidinone and Novel Derivatives of Amides." Current Organic Synthesis 17, no. 4 (July 27, 2020): 304–12. http://dx.doi.org/10.2174/1570179417666200409151330.

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Background: Imidazo[1,2-a]pyrimidinone, quinazolinone and amide derivatives have attracted a lot of interest because of their broad scope of biological and pharmacological activities. There are a lot of methods reported in the literature for their synthesis. Therefore, we became interested in developing a convenient synthetic method for the preparation of imidazoquinazolinone and amide derivatives. Objective: NiFe2O4@SiO2 @glucose amine were synthesized, characterized and have been used for the green, effective and mild multicomponent synthesis of quinazolinones, benzoimidazo[1,2-a]pyrimidinones and amides under solvent-free conditions in short reaction times and excellent yields. To expand of the scope of this avenue, multicomponent synthesis of mono and bis novel amides was tested for the first time. All of the products were characterized by mp, FT-IR, NMR and elemental analysis. Methods: Aldehyde (1mmol), 2-amino benzimidazole (1 mmol), dimedone (1mmol) or indane-1,3-dione (1 mmol) for the synthesis of quinazoline or imidazopyrimidinones and arene (1mmol), anhydride (1mmol), 2- aminobenzimidazole (1mmol) for the synthesis of amides in the nanocatalyst NiFe2O4@SiO2@glucose amine (0.15mol%: 0.05g) were stirred by a magnet for the required reaction time. After completion of the reaction, as indicated by TLC, the products were collected and recrystallized from ethanol if necessary. Results: We present a novel avenue for the synthesis of benzimidazo[1,2-a] pyrimidinones, quinazolinones and amides in the presence of NiFe2O4@SiO2@glucose amine under solvent-free conditions. Conclusion: In conclusion, we developed NiFe2O4@SiO2 @glucose amine-catalysed multicomponent synthesis of quinazolinones and imidazo[1,2-a]pyrimidinones using the reaction of benzaldehyde, dimedone or indane-dione and 2-aminobenzimidazole and multicomponent synthesis of amides using arenes, cyclic anhydrides and 2-aminobenzimidazole by a solvent-free technique. This method proves to be a robust and innovative approach for the synthesis of a biologically important structure. The operational simplicity, the excellent yields of products, ease of separation and recyclability of the magnetic catalyst, waste reduction and high selectivity are the main advantages of this method. Furthermore, this new avenue is cheap and environmentally benign.

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mousavian, Seyedsaman, Parham Faravar, Zeinab Zarei, Reza azimikia, Mohsen Ghasemi Monjezi, and Ehsan kianfar. "Modeling and simulation absorption of CO2 using hollow fiber membranes (HFM) with mono-ethanol amine with computational fluid dynamics." Journal of Environmental Chemical Engineering 8, no. 4 (August 2020): 103946. http://dx.doi.org/10.1016/j.jece.2020.103946.

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Osorio, F., M. Sánchez, and J. C. Torres. "Preliminary Studies for Obtaining Biofuel by Absorption with Mono-ethanol-amine from Anaerobic Digestion Biogas in a Wastewater Treatment Plant." Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 36, no. 18 (July 15, 2014): 2043–51. http://dx.doi.org/10.1080/15567036.2011.561272.

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Kalatjari, Hamid Reza, Ali Haghtalab, Mohammad Reza Jafari Nasr, and Amir Heydarinasab. "Experimental, simulation and thermodynamic modeling of an acid gas removal pilot plant for CO2 capturing by mono-ethanol amine solution." Journal of Natural Gas Science and Engineering 72 (December 2019): 103001. http://dx.doi.org/10.1016/j.jngse.2019.103001.

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Raveshiyan, Saba, Reza Yegani, Behzad Pourabbas, and Akram Tavakkoli. "Study on the Fabrication of Superhydrophobic Microporous Polypropylene Flat Membrane Using In Situ Synthesis of Modified Fluorinated Silica Nano Particles." Advanced Materials Research 829 (November 2013): 371–75. http://dx.doi.org/10.4028/www.scientific.net/amr.829.371.

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The wettability is the most important features of membrane, when it works as contactors. Although the membrane contactors offer many advantages over conventional contacting equipments, additional mass transfer resistance is introduced when micropores are filled with aqueous absorbents. Therefore, fabrication of superhydrophobic membrane which prevents diffusion of aqueous absorbent into membrane pores is a highly challenging task. In this work, superhydrophobic polypropylene (PP) membrane was fabricated using in situ synthesis of silica nano particles via thermally induced phase separation (TIPS) method. Flat sheet fabricated PP membranes were casted with methanolic solution containing various ratios of perfluorooctyltriethoxysilane (PFOTES)/ tetraethylortosilicate (TEOS) and then sol-gel reaction between the mixed silances was completed. The contact angle of coated membrane was reached to 168 degree, when the percentage of PFOTES/TEOS was fixed at 50% (mol/mol). Interestingly, due to the microporous structure of PP membrane, the synthesized fluorinated silica nanoparticles were observed on the surface as well as in the cross-sectional area of the membrane. Field emission scanning electron microscopy (FE-SEM) images were confirmed this point. Chemical structure of the coated membranes with 50% PFOTES was compared with pure PP membrane using ATR-IR. In order to evaluate the operational performance, coated membranes were immersed in aqueous solutions of mono ethanol amine (MEA), di ethanol amine (DEA) and pure water. In comparison with pure PP membrane, obtained results showed that the wettability of coated membranes was considerably decreased.

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Lee, C. H., X. Q. Liu, and X. Q. Gong. "Triazine Monomers and Their Adhesion to Dentin." Journal of Dental Research 65, no. 12 (December 1986): 1402–5. http://dx.doi.org/10.1177/00220345860650120401.

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A series of 4,6-dichloro-1,3,5-triazines [e.g., 2-allylamino-(ADT), diallylamino-(DADT), 2-N-p-allyloxyphenylamino-, 2-N-allyl-N-phenylamino-, and 2-N-allyl-N-p-tolylamino-4,6-dichloro-1,3,5-triazine] was synthesized and characterized by IR, NMR, and mass spectrometry. These monomers have chlorine atoms that can react with NH2 or OH groups and double bonds capable of copolymerization. Aniline reacted readily with ADT and DADT, ethanol reacted with ADT, but acetone, H2O, and DMF did not react with either triazine. It appears that ADT or DADT will react with dentinal collagen through NH2 or OH groups in the peptide side-chains. An aprotic solvent should be used for ADT or DADT, but absolute dryness in clinical usage is not essential because of the slow hydrolysis of ADT and DADT. Stability of the N-di-substituted amino derivative (DADT) is greater than that of the mono-substituted compound (ADT), which may isomerize. ADT and methyl methacrylate were copolymerized at 37°C with amine-peroxide. ADT solutions enhanced the adhesive strength of restorative resin to dentin. Thus, monomers such as ADT and DADT appear to be promising dentin-bonding agents.

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Tukumova, Natalia V., Tatiana R. Usacheva, Tran Thi Dieu Thuan, Valentin A. Sharnin, and Concetta Giancola. "STABILITY OF COORDINATION COMPOUNDS OF SOME d-METAL IONS WITH SUCCINIC ACID ANION IN AQUEOUS-ETHANOL SOLVENTS." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, no. 9-10 (October 22, 2018): 15–22. http://dx.doi.org/10.6060/ivkkt20186109-10.5778.

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The paper provides an overview of own data on complexation of nickel (II), cobalt (II) and cooper (II) ions with succinic acid anion in water-organic mixed solvents. Proper data are compared with data reported in literature for d-metal complexes with anions of maleic and succinic acids. The effect of aqueous ethanol solvent compositions on the stability of coordination compounds of M2+ with succinic acid anion as well as on рК values of stepwise succinic acid dissociation was carried out by a potentiometric titration at ionic strength of 0.1 maintained with sodium perchlorate at 298.15 ± 0.10 K. Mono ligand complexes of Ni2+, Co2+ and Cu2+ ions with succinic acid anion become stronger when ethanol content rises. In aqueous solutions Cu2+ ion forms stronger complexes with succinic and maleic acid anions than Ni2+ and Co2+ ions. In the studied water - ethanol solution this ratio is maintained for complexes with succinic acid anion, but a water-isopropanol solvent exerts leveling effect on the stability of complexes of nickel (II) and cobalt (II). An increase in the stability of complexes of d-metal with anions of maleic and succinic acids is due to the destabilization of the ligand with increasing ethanol concentration. The principal contribution of the changes in the solvation state of ligand is a typical for the stability changes of d-metal complexes with amine, glycinate, and acetate type ligands in water-organic mixed solvents. For citation: Tukumova N.V., Usacheva T.R., Thuan Tran Thi Dieu, Sharnin V.A., Giancola C. Stability of coordination compounds of some d-metal ions with succinic acid anion in aqueous-ethanol solvents. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 9-10. P. 15-22

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Gushikem, Yoshitaka, Edilson V. Benvenutti, and Yuriy V. Kholin. "Synthesis and applications of functionalized silsesquioxane polymers attached to organic and inorganic matrices." Pure and Applied Chemistry 80, no. 7 (January 1, 2008): 1593–611. http://dx.doi.org/10.1351/pac200880071593.

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Organofunctionalized silsesquioxane polymers obtained in a water-soluble form can be used to coat various substrates such as SiO2, SiO2/Al2O3, Al2O3, cellulose/Al2O3, and graphite or, when obtained in a water-insoluble form, can be used directly. These organofunctionalized silsesquioxanes can also be attached to poly(dimethylsiloxane) (PDMS) polymers. The functional groups constituted by neutral amine groups or cationic groups (pyridinium, 3- and 4-picolinium, or 1,4-diazabicyclo[2.2.2]octane (DABCO), mono- or -dicationic) have relatively high affinity for metal ion in ethanol solutions, as shown by their stability constants. Materials containing attached cationic functional groups have also been efficiently used to immobilize various electroactive species and to construct electrochemical sensors for analytical applications. This work discusses the preparation of silsesquioxane derivatives, their characterization as prepared and when dispersed on several substrates, and comments on some applications of these materials, with an emphasis on the metal adsorption process and manufacture of electrochemical sensors.

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Peyrton, Julien, Clémence Chambaretaud, and Luc Avérous. "New Insight on the Study of the Kinetic of Biobased Polyurethanes Synthesis Based on Oleo-Chemistry." Molecules 24, no. 23 (November 27, 2019): 4332. http://dx.doi.org/10.3390/molecules24234332.

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Nowadays, polyols are basic chemicals for the synthesis of a large range of polymers, such as polyurethane foams (PUF), which are produced with several other compounds, such as polyisocyanates. During the last decades, the oleo-chemistry has developed several routes from glycerides to polyols for the polyurethanes (PU) industry to replace mainly conventional fossil-based polyols. A large range of biobased polyols can be now obtained by epoxidation of the double bonds and ring-opening (RO) of the subsequent epoxides with different chemical moieties. In preliminary studies, the RO kinetics of an epoxidized model molecule (methyl oleate) with ethanol and acetic acid were investigated. Subsequently, polyols that were derived from unsaturated triglycerides were explored in the frame of e.g., PUF formulations. Different associations were studied with different mono-alcohols derived from epoxidized and ring-opened methyl oleate while using several ring-openers to model such systems and for comparison purposes. Kinetic studies were realized with the pseudo-first-order principle, meaning that hydroxyls are in large excess when compared to the isocyanate groups. The rate of isocyanate consumption was found to be dependent on the moiety located in β-position of the reactive hydroxyl, following this specific order: tertiary amine >> ether > ester. The tertiary amine in β-position of the hydroxyl tremendously increases the reactivity toward isocyanate. Consequently, a biobased reactive polyurethane catalyst was synthesized from unsaturated glycerides. These approaches offer new insights regarding the replacement of current catalysts often harmful, pungent, and volatile used in PU and PUF industry, in order to revisit this chemistry.

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Kalatjari, Hamid Reza, Ali Haghtalab, Mohammad Reza Jafari Nasr, and Amir Heydarinasab. "Experimental and modeling using a generalized Patel-Teja-Valderrama equation of state for computation of mono ethanol amine (MEA) solution density in a CO2 capturing pilot plant." Fluid Phase Equilibria 525 (December 2020): 112803. http://dx.doi.org/10.1016/j.fluid.2020.112803.

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Ma, Yanqing, Yitao Liao, Yi Su, Baojie Wang, Yong Yang, Dong Ji, Hongwei Li, Huairong Zhou, and Dongliang Wang. "Comparative Investigation of Different CO2 Capture Technologies for Coal to Ethylene Glycol Process." Processes 9, no. 2 (January 22, 2021): 207. http://dx.doi.org/10.3390/pr9020207.

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The coal to ethylene glycol (CTEG) process has drawn much attention due to the serious conflict between supply and demand of ethylene glycol in China. However, it is inevitably accompanied by the problem of high CO2 emissions. Carbon capture is one of the most promising potential effective ways to address this issue. However, the CTEG process, integrated with carbon capture technology, will lead to energy and economic penalties. Thus, a comprehensive evaluation of CTEG process with different CO2 capture technologies is urgently needed. This study analyzed the technoeconomic performance of four CO2 capture alternatives for the CTEG process: Rectisol, mono-ethanol amine (MEA), chilled ammonia process (CAP) and dimethyl carbonate (DMC) technologies. Results show the energy consumption of CO2 capture of the Rectisol process is the lowest, 1.88 GJ/tCO2, followed by the DMC process, 2.10 GJ/tCO2, the CAP process, 3.64 GJ/tCO2, and the MEA process, 5.20 GJ/tCO2. The CO2 capture cost of the Rectisol process is lowest, CNY 169.5/tCO2, followed by the DMC process, CNY 193.2/tCO2, the CAP process CNY 232.6/tCO2, and the MEA process CNY 250.5/tCO2. As the Rectisol technology has the best comprehensive performance, it is the best option for CTEG industry in comparison with the MEA, CAP, and DMC technologies.

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McGaughy, Kyle, and M. Toufiq Reza. "Systems Analysis of SO2-CO2 Co-Capture from a Post-Combustion Coal-Fired Power Plant in Deep Eutectic Solvents." Energies 13, no. 2 (January 16, 2020): 438. http://dx.doi.org/10.3390/en13020438.

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In this study, CO2 and SO2 captures from post-combustion flue gas from a pulverized coal-fired power plant were evaluated using deep eutectic solvents (DES) to replace existing mono-ethanol amine (MEA) and CanSolv technologies. The system design of the DES-based CO2 and SO2 capture was based on the National Energy Technology Laboratory’s (NETL) 550 MWe pulverized coal-fired power plant model using Illinois #06 coal. Two of the most studied DES (choline chloride and urea at a 1:2 molar ratio and methyltriphenylphosphonium bromide (METPB) and ethylene glycol at a 1:3 molar ratio) for CO2 and SO2 capture were evaluated for this system analysis. Physical properties of DES were evaluated using both density functional theory (DFT)-based modeling as well as with documented properties from the literature. A technoeconomic assessment (TEA) was completed to assess DES ability to capture CO2 and SO2. Both solvents were able to fully dissolve and capture all SO2 present in the flue gas. It was also found from the system analyses that choline chloride and urea outperformed METPB and ethylene glycol (had a lower final cost) when assessed at 10–30% CO2 capture at high operating pressures (greater than 10 bar). At high system sizes (flow rate of greater than 50,000 kmoles DES per hour), choline chloride:urea was more cost effective than METPB:ethylene glycol. This study also establishes a modeling framework to evaluate future DES for physical absorption systems by both thermophysical and economic objectives. This framework can be used to greatly expedite DES candidate screening in future studies.

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Djurendic, Evgenija, Gyöngyi Vastag, Teréziám Surányi, Mirjana Popsavesé, and Katarina Penov-Gasi. "Synthesis of some bis- and mono-2-hydroxybenzoic acid derivatives and the determination of their acidity constants." Journal of the Serbian Chemical Society 65, no. 10 (2000): 681–89. http://dx.doi.org/10.2298/jsc0010681d.

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Several bis- and mono-2-hydroxybenzoic acid derivatives were synthesized by the reaction of methyl 2-hydroxybenzoate with some alcohols (diols, polyols and amino alcohols) and their acidity constants were determined in 60% aqueous ethanol by the potentiometric titration method. It has been shown that the biochemical behaviour of these compounds is greatly dependent on then acidity. It appears that the ester derivatives are weaker acids than the amide derivatives and, therefore, can be potentially more involved in the processes of metal ions transport in plants, whereas the introduction of -OH and -??3 groups has a veiy small effect on the biochemical properties.

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Nami, Navabeh, Mehdi Forozani, Vida Khosravimoghadam, and Rahmatallah Taherinasab. "Synthesis and Characterization of Mono- and Bicycle Heterocyclic Derivatives Containing 1, 2,4-Triazole, 1,3,4-Thiadiazine and 1,3-Thiazole Rings." E-Journal of Chemistry 9, no. 1 (2012): 161–66. http://dx.doi.org/10.1155/2012/867637.

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Reaction of tartaric acid with thiocarbohydrazide(2)and thiosemicarbazide(6)afforded 1,2-bis(4-amino-5-mercapto-4H-1,2,4-triazol-3-yl)-ethane-1,2-diol(3)and 1,2-bis(5-mercapto-4H-1,2,4-triazol-3-yl)-ethane-1,2-diol(7). Reaction of compounds3and7with DMAD (dimethylacety lendi carboxylate) and DEAD (diethylacetylendicarboxylate) gave 1,2-bis(7-[(z)-methoxycarbonylmethylen]-5,6-dihydro-5H-6-one-[1,2,4] riazolo[3,4-b] [1,3,4] thiadiazin-3-yl)-ethan-1,2-diol(4), 1,2-bis(7-[(z)-ethoxycarbonylmethylen] -5,6-dihydro -5H-6-one-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl)-ethan-1,2- diol(5)and 1,2-bis(6-[(z)-methoxycarbonylmethylen]-5-oxo-[1,3]thiazolo[2,3-c] [1,2,4]triazol-3-yl)-ethan-1,2-diol(8)in good yields.

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Salmond, Rosanne C., and Orde Q. Munro. "π–π Dimerization of a mono(pyridyl–imine) platinum(II) chelate." Acta Crystallographica Section C Crystal Structure Communications 68, no. 7 (June 15, 2012): m189—m193. http://dx.doi.org/10.1107/s0108270112023748.

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The cation of the title complex salt, chlorido{2,2-dimethyl-N-[(E)-1-(pyridin-2-yl)ethylidene]propane-1,3-diamine}platinum(II) tetrafluoridoborate, [PtCl(C12H19N3)]BF4, exhibits a nominally square-planar PtIIion coordinated to a chloride ion [Pt—Cl = 2.3046 (9) Å] and three unique N-atom types,viz.pyridine, imine and amine, of the tridentate Schiff base ligand formed by the 1:1 condensation of 1-(pyridin-2-yl)ethanone and 2,2-dimethylpropane-1,3-diamine. The cations are π-stacked in inversion-related pairs (dimers), with a mean plane separation of 3.426 Å, an intradimer Pt...Pt separation of 5.0785 (6) Å and a lateral shift of 3.676 Å. The centroid (Cg) of the pyridine ring is positioned approximately over the PtIIion of the neighbouring cation (Pt...Cg= 3.503 Å).

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Bowes, Katharine F., George Ferguson, Alan J. Lough, Choudhury M. Zakaria, and Christopher Glidewell. "Phosphonoacetic acid as a building block in supramolecular chemistry: salts with organic polyamines." Acta Crystallographica Section B Structural Science 59, no. 1 (January 28, 2003): 87–99. http://dx.doi.org/10.1107/s010876810201858x.

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Phosphonoacetic acid, (HO)2P(O)CH2COOH, forms adducts with a range of amines. The acid component in these adducts may be the neutral molecule C2H5O5P, the mono-anion (C2H4O5P)− or the di-anion (C2H3O5P)2−. The substructure formed by the acid component takes the form of simple chains in compounds (1)–(3), which are the 1:1 adducts formed with 1,4-diazabicyclo[2.2.2]octane, 4,4′-bipyridyl and 1,3-trimethylenedipiperidine, respectively. These adducts contain C2H5O5P, (C2H4O5P)− and (C2H3O5P)2−, respectively, although (3) is solvated by a mixture of methanol and water. The (C2H4O5P)− anion substructure in (4), which is the adduct formed with meso-5,5,7,12,12,14-hexa-C-methyl-1,4,8,11-tetraazacyclotetradecane, is a chain of spiro-fused rings, while the substructure in (5), which is the adduct formed with 2,2′-dipyridylamine, is a chain of edge-fused rings. In (6), the adduct formed with 1,2-bis(4′-pyridyl)ethane, the anion substructure is two-dimensional. The chain substructures are linked by the amine units into two-dimensional structures in (1) and (4) and into three-dimensional frameworks in (2), (3) and (5), while the anion sheets in (6) are likewise linked by the amine units into a three-dimensional framework.

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Sonawane, Rahul B., Swapnali R. Sonawane, Nishant K. Rasal, and Sangeeta V. Jagtap. "Room-Temperature, Base-Mediated Selective Synthesis of 2-(Arylamino)ethanols and 2-Aryloxyethanols." SynOpen 03, no. 04 (October 2019): 124–37. http://dx.doi.org/10.1055/s-0039-1690334.

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A simple and efficient protocol for base-mediated selective synthesis of 2-(arylamino)ethanols from primary aromatic amines and 2-aryloxyethanols from phenols, promoted by K2CO3 has been achieved under mild conditions. Even in presence of excess alkyl halide, selective mono-N-alkylation has been achieved. Tolerance of a variety of functional groups is demonstrated by 15 examples of selective N-alkylation of aromatic amines and 19 examples of O-alkylation of phenols. The efficacy of the protocol is demonstrated by the formal synthesis of Ticlopidine®, Vildagliptin®, Quetiapine®, and Gemfibrozil®.

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Hu, Xingen, Guiming Luo, Fumin Pan, Li Yu, Qufei Li, Yulin Liang, Wenjun Fang, and Ruisen Lin. "Enthalpies and entropies of dissociation of mono-substituted amino benzoic acids in water–ethanol mixtures at 298.15 K." Thermochimica Acta 398, no. 1-2 (March 2003): 15–22. http://dx.doi.org/10.1016/s0040-6031(02)00362-3.

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JASIM, Ekhlas Q., Hawraa K. DHAIF, and Munther A. MUHAMMAD-ALI. "SYNTHESIS, CHARACTERIZATION, ANTIFUNGAL ACTIVITY AND STRUCTURE– ACTIVITY RELATIONSHIPS: STUDY OF SOME MONO- AND DI-SCHIFF BASES." Periódico Tchê Química 17, no. 34 (March 20, 2020): 528–40. http://dx.doi.org/10.52571/ptq.v17.n34.2020.552_p34_pgs_528_540.pdf.

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Schiff bases (SB) are an important type of organic compounds and have a wide range of biological activities due to commercial and pharmaceutical trading uses. The different activities of these compounds induced the researchers to synthesized and studied new types of these compounds. Two series of Schiff base derivatives were synthesized by the condensation reactions of substituted aldehydes salicylaldehyde, 4-(N,Ndimethylamino) benzaldehyde or 2,4-dimethoxybenzaldehyde with 2-amino-5-iodobenzoic acid (1:1) or with 3,5- diamenobenzoic acid (1:2) in ethanol absolute as a solvent. Different analytical techniques characterized the structure of the synthesized Schiff bases; for instance, Fourier transform infrared FT-IR and proton nuclear magnetic resonance 1H-NMR. The purity of the synthesized compounds was tested by elemental microanalysis CHN and thin layer chromatography TLC. The structural properties of the studied molecules were investigated theoretically by performing density functional theory (DFT) using the HyperChem software. The lipophilicity of the tested compounds showed that the compounds 2c, 2b, 2a, and 1c have logP values less than (5), 2.90, 3.78, 3.82 and 4.57, respectively, whereas, 1b and 1a have logP values higher than (5), 5.01 and 5.03, respectively. The Mulliken charge distribution showed that the carbonyl oxygen atom of the carboxylic group is more negative (~ - 0.4) as compared to other oxygen atoms (~ -0.3) in all selected compounds. Frontier molecular orbitals energy diagram and their bandgap provided indications about chemical reactivity and kinetic stability of the molecules. The synthesized compounds were tested for antifungal effects against Aspergillus niger and Candida albicans, which indicated that the compounds had good antifungal activity.

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Aljohani, Ghadah, Musa Said, Dieter Lentz, Norazah Basar, Arwa Albar, Shaya Alraqa, and Adeeb Ali. "Microwave-Assisted Synthesis of Mono- and Disubstituted 4-Hydroxyacetophenone Derivatives via Mannich Reaction: Synthesis, XRD and HS-Analysis." Molecules 24, no. 3 (February 7, 2019): 590. http://dx.doi.org/10.3390/molecules24030590.

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An efficient microwave-assisted one-step synthetic route toward Mannich bases is developed from 4-hydroxyacetophenone and different secondary amines in quantitative yields, via a regioselective substitution reaction. The reaction takes a short time and is non-catalyzed and reproducible on a gram scale. The environmentally benign methodology provides a novel alternative, to the conventional methodologies, for the synthesis of mono- and disubstituted Mannich bases of 4-hydroxyacetophenone. All compounds were well-characterized by FT-IR, 1H NMR, 13C NMR, and mass spectrometry. The structures of 1-{4-hydroxy-3-[(morpholin-4-yl)methyl]phenyl}ethan-1-one (2a) and 1-{4-hydroxy-3-[(pyrrolidin-1-yl)methyl]phenyl}ethan-1-one (3a) were determined by single crystal X-ray crystallography. Compound 2a and 3a crystallize in monoclinic, P21/n, and orthorhombic, Pbca, respectively. The most characteristic features of the molecular structure of 2a is that the morpholine fragment adopts a chair conformation with strong intramolecular hydrogen bonding. Compound 3a exhibits intermolecular hydrogen bonding, too. Furthermore, the computed Hirshfeld surface analysis confirms H-bonds and π–π stack interactions obtained by XRD packing analyses.

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Arulkumar, Abimannan, Kumar Satheeshkumar, Sadayan Paramasivam, Palanivel Rameshthangam, and Jose M. Miranda. "Chemical Biopreservative Effects of Red Seaweed on the Shelf Life of Black Tiger Shrimp (Penaeus monodon)." Foods 9, no. 5 (May 14, 2020): 634. http://dx.doi.org/10.3390/foods9050634.

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Hypnea musciformis (HM) and Acanthophora muscoides (AM) red seaweeds were evaluated for their antioxidant properties and efficacy to extend the chemical shelf life of black tiger shrimp (Penaeus monodon) during 14-daystorage. Treated shrimp were soaked in five percent ethanolic solution with 500 µg/mL of AM or HM powder for 30 min. HM had more phenols and flavonoids, increased radical scavenging activity, and greater H2O2 reducing power than AM in vitro. Biochemical quality indicators were significantly higher in the control group, followed by HM- and AM-treated samples during storage. On day 14 of storage, controls contained significantly higher amounts of biogenic amines than HM- or AM-treated samples. The shelf life of chilled stored shrimp increased due to the presence of compounds of butylated hydroxytoluene, sulfurous acid, heptadecane, mono (2-ethylhexyl), and 1,2-propanediol found in AM extract and sulfurous acid and 1,2-propanediol found in HM extract. A control group was soaked in the same ethanolic solution as treated samples without algae powder for 30 min. Each group was kept ice-cold during the soaking period. The results obtained demonstrate the usefulness of two seaweed extracts, Hypnea musciformis and Acanthophora muscoides, combined with ice by decreasing the formation of toxic biogenic amines in shrimp, enhancing its shelf life during ice storage.

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PARRY, Neil J., David E. BEEVER, Emyr OWEN, Isabel VANDENBERGHE, Jozef VAN BEEUMEN, and Mahalingeshwara K. BHAT. "Biochemical characterization and mechanism of action of a thermostable β-glucosidase purified from Thermoascus aurantiacus." Biochemical Journal 353, no. 1 (December 18, 2000): 117–27. http://dx.doi.org/10.1042/bj3530117.

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An extracellular β-glucosidase from Thermoascus aurantiacus was purified to homogeneity by DEAE-Sepharose, Ultrogel AcA 44 and Mono-P column chromatography. The enzyme was a homotrimer, with a monomer molecular mass of 120kDa; only the trimer was optimally active at 80°C and at pH 4.5. At 90°C, the enzyme showed 70% of its optimal activity. It was stable at pH 5.2 and at temperatures up to 70°C for 48h, but stability decreased above 70°C and at pH values above and below 5.0. The enzyme hydrolysed aryl and alkyl β-d-glucosides and cello-oligosaccharides, and was specific for substrates with a β-glycosidic linkage. The hydroxy groups at positions 2, 4 and 6 of a glucose residue at the non-reducing end of a disaccharide appeared to be essential for catalysis. The enzyme had the lowest Km towards p-nitrophenyl β-d-glucoside (0.1137mM) and the highest kcat towards cellobiose and β,β-trehalose (17052min-1). It released one glucose unit at a time from the non-reducing end of cello-oligosaccharides, and the rate of hydrolysis decreased with an increase in chain length. Glucose and d-δ-gluconolactone inhibited the β-glucosidase competitively, with Ki values of 0.29mM and 8.3nM respectively, while methanol, ethanol and propan-2-ol activated the enzyme. The enzyme catalysed the synthesis of methyl, ethyl and propyl β-d-glucosides in the presence of methanol, ethanol and propan-2-ol respectively with either glucose or cellobiose, although cellobiose was preferred. An acidic pH favoured hydrolysis and transglycosylation, but high concentrations of alcohols favoured the latter reaction. The stereochemistry of cellobiose hydrolysis revealed that β-glucosidase from T. aurantiacus is a retaining glycosidase, while N-terminal amino acid sequence alignment indicated that it is a member of glycoside hydrolase family 3.

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Wang, Caicheng, Yao Zhang, Weiwei Zhang, Susu Yuan, Tzibun Ng, and Xiujuan Ye. "Purification of an Antifungal Peptide from Seeds of Brassica oleracea var. gongylodes and Investigation of Its Antifungal Activity and Mechanism of Action." Molecules 24, no. 7 (April 4, 2019): 1337. http://dx.doi.org/10.3390/molecules24071337.

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In this study, a 8.5-kDa antifungal peptide designated as BGAP was purified from the crude extract of the seeds of Brassica oleracea var. gongylodes by employing a protocol that comprised cation exchange chromatography on SP-Sepharose, cation exchange chromatography on Mono S and gel filtration chromatography on Superdex peptide. BGAP showed the highest amino acid sequence similarity to defensin peptides by mass spectrometric analysis. BGAP showed a broad spectrum of antifungal activity with a half maximal inhibitory concentration at 17.33 μg/mL, 12.37 μg/mL, 16.81 μg/mL, and 5.60 μg/mL toward Colletotrichum higginsianum, Exserohilum turcicum, Magnaporthe oryzae and Mycosphaerella arachidicola, respectively. The antifungal activity of BGAP remained stable (i) after heat treatment at 40–100 °C for 15 min; (ii) after exposure to solutions of pH 1–3 and 11–13 for 15 min; (iii) after incubation with solutions containing K+, Ca2+, Mg2+, Mn2+ or Fe3+ ions at the concentrations of 20–150 mmol/L for 2 h; and (iv) following treatment with 10% methyl alcohol, 10% ethanol, 10% isopropanol or 10% chloroform for 2 h. Fluorescence staining experiments showed that BGAP brought about an increase in cell membrane permeability, a rise in reactive oxygen species production, a decrease in mitochondrial membrane potential, and an accumulation of chitin at the hyphal tips of Mycosphaerella arachidicola.

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Kalyuzhnaya, Marina G., Krassimira R. Hristova, Mary E. Lidstrom, and Ludmila Chistoserdova. "Characterization of a Novel Methanol Dehydrogenase in Representatives of Burkholderiales: Implications for Environmental Detection of Methylotrophy and Evidence for Convergent Evolution." Journal of Bacteriology 190, no. 11 (April 4, 2008): 3817–23. http://dx.doi.org/10.1128/jb.00180-08.

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ABSTRACT Some members of Burkholderiales are able to grow on methanol but lack the genes (mxaFI) responsible for the well-characterized two-subunit pyrroloquinoline quinone-dependent quinoprotein methanol dehydrogenase that is widespread in methylotrophic Proteobacteria. Here, we characterized novel, mono-subunit enzymes responsible for methanol oxidation in four strains, Methyloversatilis universalis FAM5, Methylibium petroleiphilum PM1, and unclassified Burkholderiales strains RZ18-153 and FAM1. The enzyme from M. universalis FAM5 was partially purified and subjected to matrix-assisted laser desorption ionization-time of fight peptide mass fingerprinting. The resulting peptide spectrum was used to identify a gene candidate in the genome of M. petroleiphilum PM1 (mdh2) predicted to encode a type I alcohol dehydrogenase related to the characterized methanol dehydrogenase large subunits but at less than 35% amino acid identity. Homologs of mdh2 were amplified from M. universalis FAM5 and strains RZ18-153 and FAM1, and mutants lacking mdh2 were generated in three of the organisms. These mutants lost their ability to grow on methanol and ethanol, demonstrating that mdh2 is responsible for oxidation of both substrates. Our findings have implications for environmental detection of methylotrophy and indicate that this ability is widespread beyond populations possessing mxaF, the gene traditionally used as a genetic marker for environmental detection of methanol-oxidizing capability. Our findings also have implications for understanding the evolution of methanol oxidation, suggesting a convergence toward the enzymatic function for methanol oxidation in MxaF and Mdh2-type proteins.

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Zakaria, Choudhury M., George Ferguson, Alan J. Lough, and Christopher Glidewell. "(1R,3S)-Camphoric acid as a building block in supramolecular chemistry: adducts with organic polyamines." Acta Crystallographica Section B Structural Science 59, no. 1 (January 28, 2003): 118–31. http://dx.doi.org/10.1107/s0108768102022358.

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(1R,3S)-Camphoric acid [(1R,3S)-1,2,2,-trimethylcyclopentane-1,3-dicarboxylic acid, C10H16O4] forms adducts with a range of amines in which the acid component may be the neutral molecule, the mono-anion (C10H15O4)− or the di-anion (C10H14O4)2−. The structures generated by the hard hydrogen bonds take the form of chains in the 1:1 adducts (II) and (III) formed with 4,4′-bipyridyl and 1,2-bis(4-pyridyl)ethane. There are single sheets in the hydrated 1:1 adduct (IV) formed with 1,4-diazabicyclo[2.2.2]octane, and pairwise-interwoven sheets in the 2:1 adduct (V) formed with hexamethylenetetramine. Three-dimensional frameworks are present in the salt-like 1:1 adduct (VI) formed with piperazine and in the hydrated 3:1 adduct (VII) formed with N,N′-dimethylpiperazine. This latter adduct contains both neutral C10H16O4 and anionic (C10H15O4)− units. In (II), (III) and (IV), the chain and sheet substructures are linked by C—H...O hydrogen bonds to form three-dimensional frameworks. The monoclinic polymorph of camphoric acid itself (I) has been reinvestigated.

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Plater, M. John, William T. A. Harrison, and Henry S. Rzepa. "Syntheses and Structures of Pseudo-Mauveine Picrate and 3-Phenylamino-5-(2-Methylphenyl)-7-Amino-8-Methylphenazinium Picrate Ethanol Mono-Solvate: The First Crystal Structures of a Mauveine Chromophore and a Synthetic Derivative." Journal of Chemical Research 39, no. 12 (December 2015): 711–18. http://dx.doi.org/10.3184/174751915x14474318419130.

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Muhammad, Zeinab A., Fatimah Alshehrei, Mohie E. M. Zayed, Thoraya A. Farghaly, and Magda A. Abdallah. "Synthesis of Novel Bis-pyrazole Derivatives as Antimicrobial Agents." Mini-Reviews in Medicinal Chemistry 19, no. 15 (September 4, 2019): 1276–90. http://dx.doi.org/10.2174/1389557519666190313095545.

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Background: bis-heterocycles especially those containing pyrazole moiety display much better antibacterial activity than mono heterocycles. Objective: Herein, we synthesised a series of new bis-pyrazoles and investigated their antimicrobial agents. Methods: A novel series of bis-pyrazole derivatives have been synthesized in good yield by coupling reaction of cyanoacetic acid 4-[(2-cyano-acetyl)-hydrazonomethyl]-benzylidene-hydrazide with a number of diazonium salts of aromatic amines in DMF in the presence of NaOH. Refluxing of the produced hydrazones with hydrazine-hydrate in ethanolic solution afforded the respective bis-pyrazoles. On the other hand, the reaction of bis(cyanoacetic acid hydrazide) derivative with a diversity of hydrazonoyl chlorides in dioxane under reflux gave bis-pyrazoles. Results: The structures of all the products were discussed and assured from all possible spectral data as well as for the elemental analysis. In addition, the results of the antimicrobial activity examination of selected derivatives revealed a high strength of some tested compounds compared to standard bactericides and fungicides utilized. Molecular docking of the newly synthesized compounds into the Enoyl ACP reductase active site supported the in vitro antimicrobial activity. All the tested compounds could fit in the enzyme binding pocket with significant binding affinities (-7.040 to -9.141 Kcal/mol). Conclusion: The good results of the antimicrobial examination of the newly synthesized bis-pyrazoles comprise the considerable evidence of the importance of bis-heterocyclic compounds which encourages us to continue designing and synthesising a novel series with potent biological activity in the future.

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Никошвили, Линда Жановна, Кристина Николаевна Шкерина, Елизавета Евгеньевна Пономарчук, and Михаил Геннадьевич Сульман. "INFLUENCE OF METAL-MODIFIERS ON THE BEHAVIOR OF LIGANDLESS PALLADIUM CATALYSTS OF SUZUKI CROSS-COUPLING." Вестник Тверского государственного университета. Серия: Химия, no. 1(39) (March 19, 2020): 18–25. http://dx.doi.org/10.26456/vtchem2020.1.2.

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В работе рассмотрены перспективы введения второго металла-модификатора в состав палладий-содержащих катализаторов кросс-сочетания Сузуки. Представлены результаты проверки каталитических свойств моно- (Pd) и биметаллических (Au-Pd, Pd-Cu, Pd-Zn) безлигандных катализаторов на основе сверхсшитого полистирола марки MN100, содержащего третичные аминогруппы, в модельной реакции кросс-сочетания 4-броманизола и фенилбороновой кислоты. Реакция проводилась на воздухе в периодическом режиме в мягких условиях (растворитель - смесь этанола и воды в объемном соотношении 4 : 1, температура 60С, основание - NaOH) в отсутствии агентов фазового переноса. Было показано, что в случае образца Pd/MN100, предварительно восстановленного в токе водорода, для достижения 100% конверсии 4-броманизола за 60 мин важно обеспечить определенный избыток фенилбороновой кислоты и NaOH (селективность по продукту кросс-сочетания при этом сохраняется равной 89%). Среди биметаллических образцов наибольшей активностью обладал катализатор Au-Pd/MN100 (достигалась 100% конверсия 4-броманизола за 15 мин реакции), однако наиболее селективным был образец Pd-Cu/MN100 (селективность составила 93%). This paper is devoted to the prospects of introducing the second metal-modifier into the composition of palladium-containing catalysts of Suzuki cross-coupling. The results of catalytic testing of mono- (Pd) and bimetallic (Au-Pd, Pd-Cu, Pd-Zn) ligandless catalysts based on hyper-crosslinked polystyrene of MN100 type containing tertiary amino-groups in the model reaction of cross-coupling of 4-bromanisole and phenylboronic acid are presented. The reaction was carried out in air in a batch mode under mild conditions (solvent - mixture of ethanol and water in a volumetric ratio of 4 : 1, temperature 60C, NaOH was used as a base) in the absence of phase-transfer agents. It was shown that in the case of Pd/MN100 sample preliminarily reduced in hydrogen flow, it is important to provide a certain excess of phenylboronic acid and NaOH in order to achieve 100% conversion of 4-bromanisole in 60 min (selectivity with respect to cross-coupling product was maintained at 89%). Among bimetallic samples, the catalyst Au-Pd/MN100 revealed the highest activity (100% conversion of 4-bromanisole was achieved in 15 min of reaction), however Pd-Cu/MN100 sample was the most selective (selectivity was 93%).

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Kolawole, Toluwanimi, Pierrot Attidekou, James Hendry, and Jonathan Lee. "Comparative Study of CO2 Capture Using Counter and Cross Flow Configurations in a Rotating Packed Bed Absorber Using Mono Ethanol Amine (MEA)." SSRN Electronic Journal, 2019. http://dx.doi.org/10.2139/ssrn.3366018.

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Munshi, Basudeb, Swaraj Panda, and Arvind Kumar. "Modelling and simulation study of CO2 capturing process in coal fired power plant using various amine solvents." WEENTECH Proceedings in Energy, October 22, 2019, 136–52. http://dx.doi.org/10.32438/wpe.5919.

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In the present world, Scientists are very much concern on to reduce the concentration level of carbon dioxide in environment to save the world. In the present work, the CO2 capturing efficiencies of three different amine solvents were analyzed. The selected solvents were mono-ethanol amine (MEA), solvent containing mixture of methyl diethanol amine (MDEA) and piperazine (PZ) called activated -MDEA and aqueous ammonia (NH3) solution. Rigorous simulation method was considered in the current study. The effects of different key parameters for different solvents on the CO2 removal efficiency were analyzed. Packing height, solvent temperature and absorber height were the significant influential parameters for MEA system whereas for activated-MDEA (a-MDEA), those are the ratio of the solvent to feed quantity and the mixed solvent PZ concentration level. For aqueous NH3 solution, absorber and stripper’s temperature, CO2 loading, concentration of NH3, height of the absorber, lean and rich solvent flow rate, boil up ratio, regeneration energy, temperature of the condenser, and duty of the reboiler were considered. The comparative study showed that MEA process recovered the maximum CO2 from flue gas. But it was suffered by the maximum regeneration duty. a-MDEA with PZ recovered 91% CO2. Overall, technically, a-MDEA was the best choice as solvent. Compared to a-MDEA and MEA, aqueous ammonia was identified as more propitious and environment friendly solvent due to its satisfactory performance and easy availability.

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Kalatjari, Hamid R., Mohammad R. Jafari Nasr, Ali Haghtalab, and Amir Heydarinasab. "Improving the accuracy of the Eyring equation by pseudo‐ideal solution model to predict the viscosity of the mono‐ethanol amine‐[Bmim] PF6 ionic liquid blends in a CO 2 capturing pilot plant." Canadian Journal of Chemical Engineering, April 28, 2021. http://dx.doi.org/10.1002/cjce.24009.

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Hossain, Md Shahriar, Suprio Kamal, Mahbub Chowdhury, Md Tariful Islam, and Kawnish Kirtania. "Parametric Study on Co-Feeding of Municipal Solid Waste and Coal in an IGCC Power Plant with Pre-Combustion Carbon Capture." Chemical Engineering Research Bulletin, June 23, 2021, 37–42. http://dx.doi.org/10.3329/cerb.v22i1.54297.

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Municipal solid waste (MSW) is one of the top contributors in greenhouse gas (i.e. methane) emissions - particularly from landfill disposals. However, it could be a remarkable source of renewable energy. In Bangladesh, generation of municipal solid waste is at least 2.7 million tonne per year in the major cities, implying a heavy environmental burden. On the other hand, there are several coal-based power plants are in the pipeline to meet the increasing energy demand in Bangladesh with the potential of significant CO2 emission. To find a remedy to the above situation, a power plant using Integrated Gasification and Combustion Cycle (IGCC) technology with pre-combustion carbon capture is considered in this study. IGCC has the advantage of producing high quality syngas from a wide variety of feed and assists in the capture of CO2 at a lower cost while providing high electric efficiency. The power plant was simulated by commercial simulation packages (Aspen PLUS™ and Aspen HYSYS™) using MSW and bituminous coal (Indonesian) as a combined feed. With a feed rate of 1800 tonne per day, Syngas produced from an entrained flow type gasifier was then treated for CO2 removal using mono-ethanol amine (MEA) solvent after necessary shift in a high temperature shift reactor. About 91% efficiency was achieved in the shift reactor while the CO2 capture efficiency was varied for this study from 30% to 85%. Further parametric variation was studied by varying the moisture content of MSW and MSW to coal feed ratio. Through combustion of the H2 rich syngas in a gas turbine and subsequent steam cycle with reheat resulted in 125 MW of electricity at an efficiency of 28.95% while capturing 50% of the CO2 generated in the process for an MSW to Coal feed ratio of 1:1. With variation in moisture content especially during monsoon season, the plant efficiency could be affected remarkably. On the other hand, it was observed that the energy requirement varied from 6 to 8 MW for every 10% increase in CO2 capture quantity. Overall, by capturing 50% of the generated CO2, it is possible to reduce the emission of a same size ultra-supercritical coal-based power plant from about 700 kg CO2/MWh to about 360 kg of net CO2/MWh incorporating co-feeding and pre-combustion capture in an IGCC power plant. Chemical Engineering Research Bulletin 21(2020) 37-42

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Journal articles on the topic 'Mono ethanol amine'

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