Academic literature on the topic 'Kinetics of the Base·Catalysed'

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Journal articles on the topic "Kinetics of the Base·Catalysed"

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Crampton, Michael R., та Ian A. Robotham. "Kinetic studies of bold σ -adduct formation and nucleophilic substitution in the reactions of ethyl 2,4,6-trinitrophenyl ether, some phenyl 2,4,6-trinitrophenyl ethers, and phenyl 2,4-dinitronaphthyl ether with aniline in dimethyl sulfoxide". Canadian Journal of Chemistry 76, № 6 (1998): 627–34. http://dx.doi.org/10.1139/v97-225.

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The reaction of ethyl 2,4,6-trinitrophenyl ether with aniline in dimethyl sulfoxide containing Dabco occurs in two stages. The first gives 5, the σ -adduct intermediate on the substitution pathway, which has been identified spectroscopically. The second yields 2,4,6-trinitrodiphenylamine, the substitution product. Kinetic studies show that proton transfer is rate limiting both in the formation of the intermediate and in its subsequent acid-catalysed decomposition. Phenoxide is a considerably better leaving group than ethoxide and the substitution reactions of phenyl 2,4,6-trinitrophenyl ethers
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Zhang, Jin, Jia-qing Xie, Ying Tang, et al. "Hydrolysis of phosphate diester catalysed by transition metal complexes of a salicylaldimine Schiff base bearing dibenzo-18-crown-6." Journal of Chemical Research 2005, no. 2 (2005): 130–34. http://dx.doi.org/10.3184/0308234054497137.

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A new crowned Schiff base ligand and its cobalt(II) and manganese(III) complexes were synthesised and characterised. These complexes were used to catalyse the hydrolysis of bis(4-nitrophenyl) phosphate (BNPP) in order to mimic the action of hydrolytic metalloenzymes. The kinetics and the mechanism of the titled reactions were investigated. The change of the characteristic ultraviolet spectra of the reaction systems was also analysed. A kinetic mathematical model of BNPP cleavage catalysed by the complexes is proposed. The function of the crown ether ring and the effects of the reaction conditi
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Banerjee, Sudheer K., R. Shanker, and Om P. Sachdeva. "Kinetics of Pb(IV) Oxidation of Substituted Methyl Mandelates — A L.F. E. R. Study." Zeitschrift für Naturforschung B 41, no. 4 (1986): 467–72. http://dx.doi.org/10.1515/znb-1986-0411.

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Lead tetra acetate (Pb(IV) or LTA) oxidation of the esters X -C6H4-CH(OH)-COOCH3(X = H, m-NO2, p-NO2, m-Cl, p-Cl, p-Br. p-CH3 and p-C2H5) gives corresponding keto esters. The reaction is first order in [Pb(IV)] and second order in [Ester], and is catalysed by pyridine and 2,6-lutidine. The pyridine catalysed reaction is first order each in [Pb(IV)]. [Ester] and [Pyridine]. A kinetic isotope effect is observed in oxidation of methyl m andelate for both uncatalysed reaction (kH/kD = 4.2) and pyridine catalysed reaction (kH/kD = 1.8). Activation param eters for both uncatalysed and pyridine catal
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Monirul, Islam. "Kinetics and mechanism of hetero-aromatic N-base ligand 1,10-phenanthroline assisted chromic acid oxidation of DL-malic acid in aqueous micellar acid media." Journal of Indian Chemical Society Vol. 96, Oct 2019 (2019): 1333–42. https://doi.org/10.5281/zenodo.5642633.

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Department of Chemistry, Seth Anandram Jaipuria College, Kolkata-700 005, India <em>E-mail</em>: monirul_vu@yahoo.co.in, michem989@gmail.com <em>Manuscript received online 18 September 2019, accepted 24 September 2019</em> Hetero-aromatic N-base ligand like 1,10-phenanthroline (phen) assisted chromic acid oxidation of malic acid in aqueous sulfuric acid media have been studied under the experimental conditions, [malic acid]<sub>T</sub> &gt;&gt; [Cr(VI)<sub>T</sub> ] at different temperatures. Under the kinetic conditions, HCrO<sub>4</sub><sup>&ndash;</sup> has been found kinetically active in
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Engell, Karen M., Robert A. McClelland, and Poul E. Sørensen. "The decomposition of methyl hemiacetals of benzaldehyde in aqueous solution: a study of the effect of aromatic substitution." Canadian Journal of Chemistry 77, no. 5-6 (1999): 978–89. http://dx.doi.org/10.1139/v99-102.

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The acid-base catalysed decomposition of hydrates and hemiacetals of carbonyl compounds are classical examples of reactions where (slow) proton transfer is coupled with heavy atom reorganization, i.e., C—O bond breaking and solvent reorganization. We have studied the influence of m- and p-substitution in the carbonyl electrophile on the kinetics of the acid and base catalysis of the decomposition of methyl hemiacetals of benzaldehyde. The experimental data are well described by three-dimensional More O'Ferrall - Jencks energy contour diagrams according to principles developed by Jencks (the BE
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Fedoroňko, Michal, Mária Petrušová, and Vladimír Kováčik. "Kinetics and mechanism of base-catalysed aldolization of 1,3-dimethoxy-2-propanone." Collection of Czechoslovak Chemical Communications 50, no. 10 (1985): 2252–59. http://dx.doi.org/10.1135/cccc19852252.

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1,3-Dimethoxy-2-propanone (HA) in an aqueous alkaline solution undergoes specifically base-catalysed aldolization with the formation of a dimer, 4-hydroxy-1,3,5-trimethoxy-4-methoxymethyl-2-pentanone (H2A2). The reaction is reversible and involves the formation or decomposition of an intermediate anion, HA2-, as the rate-determining step. The formation of a carbanion ion, A-, of the starting compound and of the HA2- anion are rapid, preceding, and generally base-catalysed reaction steps. The activation and thermodynamic parameters of the reversible reaction were determined from the dependences
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Jackson, WG, and RL Angel. "The SN1CB Mechanism in Non-Aqueous Solution." Australian Journal of Chemistry 41, no. 9 (1988): 1369. http://dx.doi.org/10.1071/ch9881369.

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The reaction between (NH3)5Co-NCMe3+ and dimethyl sulfoxide (Me2SO) to produce (NH3)5Co-OSMe23+ and MeCN in Me2SO solvent is general base-catalysed. The rates and rate laws have been determined for 10 substituted amines. First-order kinetics are observed, and the rates show a dependence which is less than first order on base (B) concentration. These facts are rationalized in terms of a common, reactive conjugate base (NH3)4(NH2)CoNCMe2+, the solvolysis of which occurs at a rate competitive with its rate of reprotonation by BH+. Alternative mechanisms are considered. The measured rates, which s
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Janík, Marek, Vojeslav Štěrba, Jiří Černý, Vladimír Macháček, and Petr Jansa. "Kinetics of base-catalysed ring closure of methyl 2,6-dinitrophenylsulfanylethanoate." Journal of Physical Organic Chemistry 18, no. 8 (2005): 844–49. http://dx.doi.org/10.1002/poc.949.

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P., A. Sarathi, A.Vijayakumar, Gnanasekaran C. та Shunmugasundaram A. "Base catalysed addition of thiophenol to β-nitrostyrene in aqueous acetonitrile - A kinetic study". Journal of Indian Chemical Society Vol. 81, Dec 2004 (2004): 1157–62. https://doi.org/10.5281/zenodo.5833645.

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Research Department of Chemistry, VHNSN College, Virudhunagar-626 001, India <em>E-mail</em> : shunmugee@hotmail.com <em>Manuscript received 11 October 2004</em> The kinetics of nucleophilic addition of thiophenol (PhSH) to &beta;-nitrostyrene (&beta;NS) has been investigated in 80% (v/v) acetonitrile-water at 25&deg;C. The reaction follows second order, first order in each rcadant. The effect of solvent composition on the rate is significant that the decrease in polarity of the medium decreases the reaction rate. A mechanism involving the formation of zwitterionic addition complex in a fast e
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Rehman, Abdul, M. F. M. Gunam Resul, Valentine C. Eze, and Adam Harvey. "A kinetic study of Zn halide/TBAB-catalysed fixation of CO2 with styrene oxide in propylene carbonate." Green Processing and Synthesis 8, no. 1 (2019): 719–29. http://dx.doi.org/10.1515/gps-2019-0042.

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Abstract Synthesis of styrene carbonate (SC) via the fixation of CO2 with styrene oxide (SO) has been investigated using a combination of zinc bromide (ZnBr2) and tetrabutylammonium halides (TBAX) as acid-base binary homogeneous catalysts. The combination of ZnBr2 and TBAB had a synergistic effect, which led to about 6-fold enhancement in the rate of SC formation as compared to using TBAB alone as a catalyst. Propylene carbonate (PC) was chosen as a green solvent for a comprehensive study of reaction kinetics. The reaction followed a first-order kinetics with respect to SO, CO2, and TBAB, wher
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Dissertations / Theses on the topic "Kinetics of the Base·Catalysed"

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Beng, Timothy Kum. "Kinetics and mechanism of the catalysis of the decomposition of hydrogen peroxide by Schiff base complexes of copper(II)." [Johnson City, Tenn. : East Tennessee State University], 2004. http://etd-submit.etsu.edu/etd/theses/available/etd-1113104-182005/unrestricted/BengT120104f.pdf.

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Thesis (M.S.)--East Tennessee State University, 2004.<br>Title from electronic submission form. ETSU ETD database URN: etd-1113104-182005 Includes bibliographical references. Also available via Internet at the UMI web site.
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Parry, Damian. "Restriction endonuclease EcoRV : use of base analogues to investigate catalysis and binding employing single turn-over kinetics and fluorescent techniques." Thesis, University of Newcastle Upon Tyne, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263130.

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Ludwichk, Raquel. "Síntese, preparação e caracterização de fotocatalisadores a base de TiO2 imobilizados em vidro borosilicato." Universidade Tecnológica Federal do Paraná, 2014. http://repositorio.utfpr.edu.br/jspui/handle/1/1111.

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CAPES<br>O presente estudo teve como foco avaliar a obtenção e caracterização de fotocatalisadores a base de TiO2 imobilizados sobre vidro borosilicato. A síntese do semicondutor foi realizada segundo o método sol-gel, tendo sido utilizado um desenho multivariado fundamentado em planejamento fatorial de experimentos, para avaliar os efeitos de variáveis experimentais de interesse sobre a microestrutura, aderência e atividade fotocatalítica do material, para a qual o corante reativo Azul QR-19 e o efluente da indústria de explosivos água vermelha foram utilizados como substratos modelo. Dentre
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Peyrovi, Mohammad-Hassan. "Etude de la destruction du coke et de ses précurseurs en presence d'hydrogène sur catalyseurs à base de platine." Poitiers, 1987. http://www.theses.fr/1987POIT2038.

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L'etude de la reaction et de la cinetique de decomposition du coke est realisee sur des catalyseurs bifonctionnels. L'influence de l'aire metallique ou d'addition de rhenium ou d'iridium sur la reaction de cokage est determinee. La formation, uniquement de methane, montre que l'elimination des precurseurs de coke est le resultat de l'hydrogenolyse
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Shiels, Rebecca Anne. "Synthesis, characterization, and evaluation of silica and polymer supported catalysts for the production of fine chemicals." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/29629.

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Thesis (Ph. D.)--Chemical Engineering, Georgia Institute of Technology, 2008.<br>Committee Chair: Dr. Christopher Jones; Committee Member: Dr. Dennis Hess; Committee Member: Dr. Hang Lu; Committee Member: Dr. Marcus Weck; Committee Member: Dr. Pradeep Agrawal. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Sousa, Joao Fernandes De. "Valorisation chimique de l'amidon de mais par hydrolyse et hydrogenolyse sur un catalyseur solide a base de ruthénium." Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL090N.

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L'étude de la valorisation de l'amidon de maïs a été effectuée dans un réacteur triphasé mécaniquement agité. La phase liquide et la phase solide finement broyée évoluent en système fermé. La phase gazeuse se comporte comme un système semi-fermé dans la mesure où la pression totale dans le réacteur est maintenue constante et égale à 75 bars. Le catalyseur utilisé est à base de ruthénium imprégné sur charbon actif et la fraction massique de ruthénium est de 5%. Dans les conditions opératoires choisies, la réaction d'hydrogenolyse doit être réalisée en 2 étapes distinctes. La première est une ét
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Alam, David. "Decomposition of Lignin Model Compounds Under Catalysed and Non-catalysed Hydrothermal Liquefaction Conditions." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/16178.

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The decomposition of lignin under Hydrothermal Liquefaction (HTL) conditions yields an aqueous product containing valuable aromatic chemicals in addition to solids and gaseous products. This thesis shows the kinetics and reaction pathways of lignin decomposition under HTL conditions using diaryl model compounds representative of the α–O–4 and β–O–4 ether linkages found in lignin. Additionally, aromatic aldehydes with varying degrees of hydroxy and methoxy substitution have been investigated to determine their respective reaction pathways and possible contribution to CO2 formation. A laboratory
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Schweicher, Julien. "Kinetic and mechanistic studies of CO hydrogenation over cobalt-based catalysts." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210036.

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During this PhD thesis, cobalt (Co) catalysts have been prepared, characterized and studied in the carbon monoxide hydrogenation (CO+H2) reaction (also known as “Fischer-Tropsch” (FT) reaction). In industry, the FT synthesis aims at producing long chain hydrocarbons such as gasoline or diesel fuels. The interest is that the reactants (CO and H2) are obtained from other carbonaceous sources than crude oil: natural gas, coal, biomass or even petroleum residues. As it is well known that the worldwide crude oil reserves will be depleted in a few decades, the FT reaction represents an attractive al
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Chaieb, Tesnim. "Vers une meilleure compréhension de la réduction sélective des oxydes d'azote par les hydrocarbures sur les catalyseurs à base d'argent et d'or supportés sur alumine." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066431/document.

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Ces travaux de thèse ont porté sur l'étude approfondie de catalyseurs à base d'argent et d'or dans la réduction catalytique sélective des NOx par C3H6. Pour le système Ag/Al2O3, nous avons réussi à fournir une explication rationnelle de l'origine de l'existence d'un optimum d'activité pour une teneur en Ag de l'ordre de 2 %pds reporté à plusieurs reprises. La caractérisation par NOx-TPD des catalyseurs Ag/Al2O3 a permis d'attribuer l'origine de cet optimum à la teneur maximale en Ag pour laquelle la dispersion quasi-atomique de l'argent est préservée. Nous avons aussi démontré pour la première
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Zhou, Mingxia. "First-principles based micro-kinetic modeling for catalysts design." Diss., Kansas State University, 2018. http://hdl.handle.net/2097/38608.

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Doctor of Philosophy<br>Department of Chemical Engineering<br>Bin Liu<br>Efficient and selective catalysis lies at the heart of many chemical reactions, enabling the synthesis of chemicals and fuels with enormous societal and technological impact. A fundamental understanding of intrinsic catalyst properties for effective manipulation of the reactivity and selectivity of industrial catalysts is essential to select proper catalysts to catalyze the reactions we want and hinder the reactions we do not want. The progress in density functional theory (DFT) makes it possible to describe interfac
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Books on the topic "Kinetics of the Base·Catalysed"

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Moosavi, Sayed Mojtaba. Base-catalysed ring opening reactions of cycloalkanols. Universityof Manchester, 1996.

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Ljungström, Sten. Laser diagnostics and kinetics of OH formation in the catalysed H₂+O₂ reaction. Dept., Univ., 1988.

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Sverdrup, Harald U. The kinetics of base cation release due to chemical weathering. Lund University Press, 1990.

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Laks, Peter Edward. Condensed tannins: Base-catalysed reactions of polymeric procyanidins with phloroglucinol : intramolecular rearrangements / Peter E. Laks and Richard W. Hemingway, Anthony H. Conner. Forest Products Laboratory, 1988.

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Laks, Peter Edward. Condensed tannins: Base-catalysed reactions of polymeric procyanidins with phloroglucinol : intramolecular rearrangements / Peter E. Laks and Richard W. Hemingway, Anthony H. Conner. Forest Products Laboratory, 1988.

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Laks, Peter E. Condensed tannins: Base-catalysed reactions of polymeric procyanidins with phloroglucinol : intramolecular rearrangements / Peter E. Laks and Richard W. Hemingway, Anthony H. Conner. Forest Products Laboratory, 1988.

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Laks, Peter E. Condensed tannins: Base-catalysed reactions of polymeric procyanidins with phloroglucinol : intramolecular rearrangements / Peter E. Laks and Richard W. Hemingway, Anthony H. Conner. Forest Products Laboratory, 1988.

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Laks, Peter E. Condensed tannins: Base-catalysed reactions of polymeric procyanidins with phloroglucinol : intramolecular rearrangements / Peter E. Laks and Richard W. Hemingway, Anthony H. Conner. Forest Products Laboratory, 1988.

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Laks, Peter Edward. Condensed tannins: Base-catalysed reactions of polymeric procyanidins with phloroglucinol : intramolecular rearrangements / Peter E. Laks and Richard W. Hemingway, Anthony H. Conner. Forest Products Laboratory, 1988.

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Biodiesel kinetics: One-phase base-catalyzed methanolysis of soybean oil using tetrahdrofuran as cosolvent. National Library of Canada, 1995.

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Book chapters on the topic "Kinetics of the Base·Catalysed"

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Punekar, N. S. "Acid–Base Chemistry and Catalysis." In ENZYMES: Catalysis, Kinetics and Mechanisms. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0785-0_30.

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Punekar, Narayan S. "Acid–Base Chemistry and Catalysis." In ENZYMES: Catalysis, Kinetics and Mechanisms. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-97-8179-9_28.

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Kapteijn, F., and J. A. Moulijn. "Kinetics of Catalysed and Uncatalysed Coal Gasification." In Carbon and Coal Gasification. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4382-7_11.

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Yon-Kahn, Jeannine, and Guy Hervé. "Kinetics of Enzymatic Reactions Catalysed by Immobilised Enzymes." In Molecular and Cellular Enzymology. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-01228-0_18.

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Divakar, Soundar. "Kinetics of Some Selected Enzyme-Catalysed Reactions in Organic Solvents." In Enzymatic Transformation. Springer India, 2012. http://dx.doi.org/10.1007/978-81-322-0873-0_10.

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Kuo, Jeff (Jih Fen). "Acid-Base Equilibria in Aqueous Solutions." In Chemistry, Thermodynamics, and Reaction Kinetics for Environmental Engineers. CRC Press, 2024. http://dx.doi.org/10.1201/9781003502661-8.

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Leroy, Jean Louis, Daniel Broseta, Nicolas Bolo, and Maurice Guéron. "NMR Studies of Base-Pair Kinetics of Nucleic Acids." In Structure and Dynamics of RNA. Springer US, 1986. http://dx.doi.org/10.1007/978-1-4684-5173-3_3.

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Denisov, E. T., O. M. Sarkisov, and G. I. Likhtenshtein. "Acid-base catalysis." In Chemical Kinetics. Elsevier, 2003. http://dx.doi.org/10.1016/b978-044450938-3/50037-5.

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Arnaut, Luis, Sebastiao Formosinho, and Hugh Burrows. "Acid-Base Catalysis and Proton-Transfer Reactions." In Chemical Kinetics. Elsevier, 2007. http://dx.doi.org/10.1016/b978-044452186-6/50013-4.

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Arnaut, Luis. "Acid–base catalysis and proton-transfer reactions." In Chemical Kinetics. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-444-64039-0.00011-x.

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Conference papers on the topic "Kinetics of the Base·Catalysed"

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Keestra, Hilbert, Yordi Slotboom, Kevin H. R. Rouwenhorst, and Derk W. F. Brilman. "A Century of Data: Thermodynamics and Kinetics for Ammonia Synthesis on Various Commercial Iron-based Catalysts." In The 35th European Symposium on Computer Aided Process Engineering. PSE Press, 2025. https://doi.org/10.69997/sct.128811.

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This work presents an improved thermodynamic model, an equilibrium model, and a unified kinetic model for ammonia synthesis. The thermodynamic model accurately describes the non-ideality of the reaction system up to 1000 bar using a modified Soave-Redlich-Kwong Equation-of-State. The developed Langmuir-Hinshelwood kinetic model accurately describes ammonia synthesis on iron-based catalysts by incorporating N* and H* surface species, whereas H* species are mainly relevant below 400�C. The model fits an extensive dataset across diverse conditions (251-550�C, 1-324 bar, H2/N2 ratios 0.33-8.5, and
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Bravo, Leonardo, Camilo Rengifo, Martha Cobo, and Manuel Figueredo. "A 2D Axisymmetric Transient State CFD Modelling of a Fixed-bed Reactor for Ammonia Synthesis." In The 35th European Symposium on Computer Aided Process Engineering. PSE Press, 2025. https://doi.org/10.69997/sct.158817.

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Power-to-Ammonia technology offers sustainable pathways for energy storage and chemical production, with fixed-bed reactors being critical components for efficient synthesis. Understanding reactor dynamics under varying conditions is essential for optimizing these systems, particularly when integrated with intermittent renewable energy sources. This study aims to develop and validate a 2D axisymmetric CFD model for analysing the dynamic response of a ruthenium-catalysed ammonia synthesis reactor to thermal perturbations. The model incorporates detailed reaction kinetics, multicomponent mass tr
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Hornus, Edgar C., Martín A. Rodríguez, Ricardo M. Carranza, and Raul B. Rebak. "Effect of Temperature on the Repassivation Kinetics of Crevice-Corroded Nickel Base Alloys." In CORROSION 2015. NACE International, 2015. https://doi.org/10.5006/c2015-05739.

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Abstract Nickel alloys containing chromium and molybdenum are candidate materials for the construction of high-level nuclear waste containers. The temperature at the waste containers surface will rise after the repository closure due to the heat released from radioactive decay. After reaching a peak, temperature will slowly decrease. In the present work, we have studied the crevice corrosion repassivation kinetics on cooling, for alloys N06022, N07022 and N10362 in chloride solutions. A two-stage electrochemical test was used. Crevice corrosion initiation and propagation occurred after an incu
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Manaenkov, Oleg, Olga Kislitsa, Antonina Stepacheva, Linda Nikoshvili, and Valentina Matveeva. "OPTIMIZATION OF PROCESS CONDITIONS FOR THE CATALYTIC CONVERSION OF MICROCRYSTALLINE CELLULOSE INTO SUGAR ALCOHOLS." In 24th SGEM International Multidisciplinary Scientific GeoConference 24. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/4.1/s17.21.

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The scale of annual reproduction of cellulose-containing biomass in nature allows us to draw an unambiguous conclusion that cellulose is the only source of raw materials for the chemical and fuel industries, representing a real alternative to fossil resources and, first of all, oil. Cellulose is the main component of plant biomass. According to some estimates, almost half of the organic carbon in the biosphere is contained in cellulose. Hydrolytic hydrogenation is a special case of carbohydrate hydrogenation. With regard to cellulose, the essence of the process is to combine the processes of i
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Simonen, E. P., L. E. Thomas, and S. M. Bruemmer. "Diffusion Kinetic Issues During Intergranular Corrosion of Ni-Base Alloys." In CORROSION 2000. NACE International, 2000. https://doi.org/10.5006/c2000-00226.

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Abstract Exposure of Ni-base alloys to hot water results in corrosion reactions at advancing stress corrosion cracks and intergranular degradation at crack walls. The morphology of the corrosion is characterized by very narrow widths of oxides for long distances along grain boundaries. Of particular interest is that this response of alloys occurs during exposure to non-oxidizing water at 330°C. The mechanisms by which oxidation reactions occur in these tight restricted pathways have critical impact on stress corrosion cracking susceptibility. In the present paper, diffusion kinetic analyses ar
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Angeliu, T. M., and P. L. Andresen. "The Effect of Zinc Additions on the Oxide Rupture Strain and Repassivation Kinetics of FE-Base Alloys in 288°C Water." In CORROSION 1995. NACE International, 1995. https://doi.org/10.5006/c1995-95411.

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Abstract The effect of Zn water chemistry additions on the mechanism of intergranular stress corrosion cracking (IGSCC) of Fe-base alloys in water at 288°C was evaluated in terms of the slip-dissolution model. In this model, an increase in the oxide film rupture strain or surface film repassivation kinetics will improve the resistance to IGSCC. The oxide rupture strain of 304L stainless steel increases up to a factor of 2 in both deaerated and 200 ppb oxygenated, high purity water (&amp;lt;0.08 μS/cm outlet) after exposure to Zn concentrations up to 60 ppb and at 20 ppb Zn for &amp;gt;300 hour
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Harper, Mark A., and Robert A. Rapp. "Chromized/Siliconized Diffusion Coatings for Iron-Base Alloys by Pack Cementation." In CORROSION 1991. NACE International, 1991. https://doi.org/10.5006/c1991-91066.

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Abstract The codeposition of chromium and silicon into a 2.25Cr-1.0Mo-0.15C steel, Alloy 800, and 304 stainless steel has been achieved using the pack cementation process. The ferritic coating produced on the 2.25Cr-1.0Mo steel was approximately 225 microns (9 mils) thick, whereas the inward diffusion of chromium and silicon produced a two-phase structure of ferrite and austenite for the 304 stainless steel. Chromium and silicon were incorporated into the austenitic solid solution upon diffusion into Alloy 800. Ail of the coatings had approximately 25-35wt% Cr and 24% Si at the surface. Cyclic
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Church, Benjamin, Elmer A. Prenzlow, Lizeth Ortiz, and James Myers. "Oxidation Kinetics of Cast Alumina-Forming Austenitic Alloys in Steam." In CORROSION 2017. NACE International, 2017. https://doi.org/10.5006/c2017-09785.

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Abstract Alloy tubes used in petrochemical processing reactor systems are often subjected to oxidizing conditions in high temperature steam such as during de-coking cycles. The ability of the alloy to form an adherent and continuous oxide layer is critical to ensure the material resists coking and other high temperature attack during operation. A new class of heat resistant austenitic cast alloys are being developed that are designed to form protective oxides of alumina. Experimental compositions based on a 25Cr-35Ni base composition with aluminum additions ranging from 2.6 to 3.9 wt% were fab
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Andresen, Peter L. "A Mechanism for the Effects of Ionic Impurities on SCC of Austenitic Iron and Nickel Base Alloys in High Temperature Water." In CORROSION 1985. NACE International, 1985. https://doi.org/10.5006/c1985-85101.

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Abstract Evidence for mass transport control of stress corrosion cracking kinetics in high temperature water will be discussed, particularly with reference to observations of crack growth rate enhancement in impure water. Aqueous impurities cause complexing and pH shifts at the crack tip, which influence mass transport processes via enhanced metal ion solubility and decreased transport path tortuosity resulting from the higher metal oxide solubility. The crack growth rate enhancement by impurities is sensitive to the effects of cyclic loading and flow rate and to material behavior (branching,
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Rakowski, James M. "High Temperature Oxidation of Heat-Resistant Alloys in Combustion Environments." In CORROSION 2008. NACE International, 2008. https://doi.org/10.5006/c2008-08446.

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Abstract Water vapor is a major component of most combustion gas streams, and has been shown to generally increase the rate of attack of heat-resistant alloys at elevated temperatures. The role of water vapor in causing accelerated oxidation will be reviewed for a variety of alloys, including austenitic stainless steels, ferritic stainless steels, and nickel-base superalloys. A variety of factors will be considered, including environmental variables such as gas composition and temperature, alloy composition, and specimen thickness. Specifically, iron-base alloys are more susceptible to increas
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Reports on the topic "Kinetics of the Base·Catalysed"

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Zauche, Timothy. Kinetics and mechanisms of the oxidation of alcohols and hydroxylamines by hydrogen peroxide, catalyzed by methyltrioxorhenium, MTO, and the oxygen binding properties of cobalt Schiff base complexes. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/770652.

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Herron, J., and W. Tsang. Kinetics data base for combustion modeling. Office of Scientific and Technical Information (OSTI), 1988. http://dx.doi.org/10.2172/5417264.

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Gu, Tianbao, Samuel Simon Araya, and Vincenzo Liso. CFD Modeling of NH3 Synthesis on Ru-Based Catalyst for Hydrogen Storage and Transport. Aalborg University, 2024. https://doi.org/10.54337/aau772652211.

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Hydrogen is often considered as a promising alternative to fossil fuels, however its low boiling point and diffusivity cause a huge challenge for storage and transport. Therefore an alternative fuel like ammonia, containing 17 wt.% hydrogen with a higher boiling point, seems a very promising solution for hydrogen storage and transport. In this paper, ammonia synthesis via the most widely used Haber-Bosch process has been investigated. A computational fluid dynamics (CFD) model is developed for a lab-scale reactor, incorporating the modified Temkin kinetic model describing the complex catalytic
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Dumesic, J. Experimental and kinetic modeling of acid/base and redox reaction over oxide catalysts: Annual report. Office of Scientific and Technical Information (OSTI), 1989. http://dx.doi.org/10.2172/5999460.

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Chulalaksananukul, Warawut. Synthesis and amyl acetate by lipases from various microorgamisms. Chulalongkorn University, 1997. https://doi.org/10.58837/chula.res.1997.15.

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The main objective of this study is to synthesize biofragrance "amyl acetate" naturally extractable from the flowers of the Thai plant called "Nom Maew" (Rauwenhoffia siamenesis Scheff.) by a biotechnological method. Lipases from various microorganisms namely Aspergillus niger, Candida cylindracea, Pseudomonas species and Mucor miehei were applied to catalyze the synthetic reaction between amyl alcohol and octyl acetate through the process of "transesterification". The reaction mixture was incubated in organic solvent, hexane, at 40 ํC, with continous stirring by magnetic stirrer. The products
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Jacobs, Timothy, and Jacob Hedrick. PR-457-14201-R03 Variable NG Composition Effects in LB 2S Compressor Engines - Prediction Enhancement. Pipeline Research Council International, Inc. (PRCI), 2017. http://dx.doi.org/10.55274/r0011406.

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Phase II of the project has focused on improving the initial analysis performed in the first phase by enhancing the various aspects of predictive combustion for lean burn spark ignition natural gas engines under variable composition fueling. These enhancements have incorporated validation data from a Cooper-Bessemer GMVH-10C3 engine located in New Jersey, which improves upon the lack of field data to bound the scope of composition variation. In simulation related endeavors, effort was made to improve the fundamental combustion physics related parameters, namely laminar flame speed, by developi
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[Experimental and kinetic modeling of acid/base and redox reactions over oxide catalysts]. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/6341603.

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(Experimental and kinetic modeling of acid/base redox reactions over metal oxide catalysts). Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6740083.

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[Experimental and kinetic modeling of acid/base and redox reactions over oxide catalysts]. Technical progress report. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10161261.

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