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Journal articles on the topic 'Catalyse de fer'

Author: Grafiati

Published: 30 November 2024

Last updated: 31 July 2025

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1

Berger, Jade. "Le vestige sidérurgique, du déchet industriel à l’objet patrimonial." Journal des anthropologues 180-181 (2025): 103–18. https://doi.org/10.4000/14bx3.

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En Lorraine du Fer, le phénomène de désindustrialisation fait apparaître à partir de 1968 de multiples friches sidérurgiques où les lieux de production et les machines, devenus désuets, sont assimilés à des déchets industriels sans valeur apparente. La politique de table rase engagée par les industriels, puis celle de renaturation préconisée par les acteurs de la reconversion, entrainent la démolition des usines sidérurgiques. Pourtant, la disparition rapide des vestiges catalyse le phénomène de patrimonialisation puisque de nombreux acteurs s’investissent dans le devenir-déchet de l’usine. Ce

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2

Siffert, B., and A. Naidja. "Decarboxylation catalytique de l'acide oxaloacetique en presence de montmorillonite." Clay Minerals 22, no. 4 (1987): 435–46. http://dx.doi.org/10.1180/claymin.1987.022.4.07.

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ResumeLa décarboxylation de l'acide oxaloacétique en acide pyruvique a été étudiée en présence de montmorillonite saturée en cations différents et des mêmes cations à l'état libre (non incorporés). L'action catalytique dépend de la nature du cation, cést-à-dire de sa facilité à former des complexes avec l'acide oxaloacétique. Le réseau argileux intervient dans la catalyse essentiellement par les atomes d'aluminium (ou de fer) situés sur les bords des feuillets argileux. Il joue le rôle d'un métalloenzyme biologique. Le calcul des énergies d'activation pour les différents systèmes met bien en é

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3

D'Hont, M., and J. C. Jungers. "Contribution à l'étude du mécanisme de la catalyse hétérogène: L'Activation de l'Azote par le fer et le Nickel." Bulletin des Sociétés Chimiques Belges 58, no. 10-12 (2010): 450–59. http://dx.doi.org/10.1002/bscb.19490581004.

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4

Jurkowski, Artur, and Zofia Lendzion-Bieluń. "Determination of Fe2+/Fe3+ mole ratio based on the change of precursor lattice parameters of wustite based iron catalysts for the ammonia synthesis." Polish Journal of Chemical Technology 21, no. 3 (2019): 48–52. http://dx.doi.org/10.2478/pjct-2019-0029.

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Abstract In the presented article, oxide forms of iron catalysts with the wustite structure and with a R = Fe2+/Fe3+ molar ratio in the range from 3.78 to 8.16 were investigated. The chemical composition of the tested catalyst precursors was determined by inductively coupled plasma optical emission spectrometry (ICP-OES). The X-ray diffraction (XRD) technique was used to determine the phase composition and location of reflections characteristic of the Fe1−xO phase. The molar ratio of iron ions R = Fe2+/Fe3+ was determined by manganometric titration. The distribution of promoters in the structu

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5

Sun, Xinhui, Antonios Arvanitis, Devaiah Damma, et al. "Carbon Nanotube Formation on Cr-Doped Ferrite Catalyst during Water Gas Shift Membrane Reaction: Mechanistic Implications and Extended Studies on Dry Gas Conversions." Catalysts 10, no. 8 (2020): 927. http://dx.doi.org/10.3390/catal10080927.

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A nanocrystalline chromium-doped ferrite (FeCr) catalyst was shown to coproduce H2 and multiwalled carbon nanotubes (MWCNTs) during water gas shift (WGS) reaction in a H2-permselective zeolite membrane reactor (MR) at reaction pressures of ~20 bar. The FeCr catalyst was further demonstrated in the synthesis of highly crystalline and dimensionally uniform MWCNTs from a dry gas mixture of CO and CH4, which were the apparent sources for MWCNT growth in the WGS MR. In both the WGS MR and dry gas reactions, the operating temperature was 500 °C, which is significantly lower than those commonly used

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6

Gholami, Fatemeh, Zahra Gholami, Martin Tomas, Veronika Vavrunkova, Somayeh Mirzaei, and Mohammadtaghi Vakili. "Promotional Effect of Manganese on Selective Catalytic Reduction of NO by CO in the Presence of Excess O2 over M@La–Fe/AC (M = Mn, Ce) Catalyst." Catalysts 10, no. 11 (2020): 1322. http://dx.doi.org/10.3390/catal10111322.

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The catalytic performance of a series of La-Fe/AC catalysts was studied for the selective catalytic reduction (SCR) of NO by CO. With the increase in La content, the Fe2+/Fe3+ ratio and amount of surface oxygen vacancies (SOV) in the catalysts increased; thus the catalytic activity improved. Incorporating the promoters to La3-Fe1/active carbon (AC) catalyst could affect the catalyst activity by changing the electronic structure. The increase in Fe2+/Fe3+ ratio after the promoter addition is possibly due to the extra synergistic interaction of M (Mn and Ce) and Fe through the redox equilibrium

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7

Wang, Yizhou, Zheng Wang, Qiuyue Zhang, et al. "Non-Symmetrically Fused Bis(arylimino)pyridines with para-Phenyl Substitution: Exploring Their Use as N′,N,N″-Supports in Iron Ethylene Polymerization Catalysis." Catalysts 14, no. 3 (2024): 213. http://dx.doi.org/10.3390/catal14030213.

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Through the implementation of a one-pot strategy, five examples of non-symmetrical [N,N-diaryl-11-phenyl-1,2,3,7,8,9,10-heptahydrocyclohepta[b]quinoline-4,6-diimine]iron(II) chloride complexes (aryl = 2,6-Me2Ph Fe1, 2,6-Et2Ph Fe2, 2,6-i-Pr2Ph Fe3, 2,4,6-Me3Ph Fe4, and 2,6-Et2-4-MePh Fe5), incorporating fused six- and seven-membered carbocyclic rings and appended with a remote para-phenyl group, were readily prepared. The molecular structures of Fe2 and Fe3 emphasize the variation in fused ring size and the skewed disposition of the para-phenyl group present in the N′,N,N″-ligand support. Upon

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8

Gowri Krishnan, Shamala, Fei Ling Pua, Kumaran Palanisamy, and Sharifah Nabihah. "Preparation of Oil Palm EFB Derived Solid Acid Catalyst for Esterification Reaction: Effect of Calcination Temperature." Key Engineering Materials 701 (July 2016): 117–21. http://dx.doi.org/10.4028/www.scientific.net/kem.701.117.

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Oil palm empty fruit bunch (EFB) is one of the palm biomass produced in abundance after oil extraction in Malaysia. This study was focused to utilize this waste biomass as a beneficial raw materials. EFB was used to prepare new solid acid catalyst for biodiesel production. EFB was converted into solid catalyst via direct impregnation method and it was used to catalyse esterification of oleic acid. Transition metal sulfide salt, Fe2(SO4)3 was impregnated on EFB fibres. Effect of different calcination temperature was studied on the properties of catalyst. The result shows that Fe2(SO4)3 based so

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9

Boscá, Lisardo, and Antonio Castrillo. "Nitric oxide, vascular function and exercise." Biochemist 34, no. 3 (2012): 28–32. http://dx.doi.org/10.1042/bio03403028.

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NO (nitric oxide) is a diffusible gas molecule produced intracellularly by three distinct nitric oxide synthase (NOS) enzymes that are highly conserved in mammalian species. The NOS enzymes are haemcontaining proteins that catalyse a fiveelectron oxidation process of the guanidino nitrogen of arginine and in the presence of O2. NOS activity is, in fact, a tandem of two consecutive reactions: a reductase step catalysed by a moiety of NOS homologous with the cytochrome P450 reductase, including the NADPH and flavin nucleotide cofactorbinding domains, and an oxygenase step coupling the reduction

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10

Rusconi, Brigida, and Gilbert Greub. "Discovery of catalases in members of the Chlamydiales order." Journal of Bacteriology 195, no. 16 (2013): 3543–51. https://doi.org/10.1128/JB.00563-13.

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Catalase is an important virulence factor for survival in macrophages and other phagocytic cells. In Chlamydiaceae, no catalase had been described so far. With the sequencing and annotation of the full genomes of Chlamydia-related bacteria, the presence of different catalase-encoding genes has been documented. However, their distribution in the Chlamydiales order and the functionality of these catalases remain unknown. Phylogeny of chlamydial catalases was inferred using MrBayes, maximum likelihood, and maximum parsimony algorithms, allowing the description of three clade 3 and two clade 2 cat

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Ghosh, Shishir, Graeme Hogarth, Nathan Hollingsworth, Katherine B. Holt, Shariff E. Kabir та Ben E. Sanchez. "Hydrogenase biomimetics: Fe2(CO)4(μ-dppf)(μ-pdt) (dppf = 1,1′-bis(diphenylphosphino)ferrocene) both a proton-reduction and hydrogen oxidation catalyst". Chem. Commun. 50, № 8 (2014): 945–47. http://dx.doi.org/10.1039/c3cc46456c.

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The diiron complex Fe<sub>2</sub>(CO)<sub>4</sub>(μ-dppf)(μ-pdt) is an active catalyst for both the reduction of protons to give hydrogen and also the reverse oxidation of hydrogen and thus mimics hydrogenases which are able to catalyse both reactions.

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12

Liu, Hua Zhang, Xia Zhen Yang, Ya Qing Cen, and Hao Dong Tang. "A Novel Fe_1-xO-Based Fused Iron Catalyst for Fischer-Tropsch Synthesis with the High Olefine Selectivity." Advanced Materials Research 512-515 (May 2012): 2207–11. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.2207.

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The performance and stability for FTS was studied on novel Fe1-xO-based iron catalyst (FIC) in agitated slurry reactor (ASR) and fixed bed reactor (FBR), and compared with precipitation-iron catalyst (PIC). The studied results indicate that novel Fe1-xO-based iron catalyst has the high conversion and high stability, especially, the high alkene selectivity in C2 ~ C4 products that the ratios of olefines and paraffines the more than 9 and the low cost, the preparation process and the high mechanical intensity. The catalyst can be used at FBR or ASR, and FTS at high temperature or low temperature

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13

Ettwig, Katharina F., Baoli Zhu, Daan Speth, Jan T. Keltjens, Mike S. M. Jetten, and Boran Kartal. "Archaea catalyze iron-dependent anaerobic oxidation of methane." Proceedings of the National Academy of Sciences 113, no. 45 (2016): 12792–96. http://dx.doi.org/10.1073/pnas.1609534113.

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Anaerobic oxidation of methane (AOM) is crucial for controlling the emission of this potent greenhouse gas to the atmosphere. Nitrite-, nitrate-, and sulfate-dependent methane oxidation is well-documented, but AOM coupled to the reduction of oxidized metals has so far been demonstrated only in environmental samples. Here, using a freshwater enrichment culture, we show that archaea of the order Methanosarcinales, related to “Candidatus Methanoperedens nitroreducens,” couple the reduction of environmentally relevant forms of Fe3+ and Mn4+ to the oxidation of methane. We obtained an enrichment cu

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14

Muñiz, Kilian. "Metal-free catalytic vicinal diamination of alkenes." Pure and Applied Chemistry 85, no. 4 (2013): 755–61. http://dx.doi.org/10.1351/pac-con-12-10-23.

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The development of an intramolecular vicinal diamination protocol using metal-free conditions is discussed. The reaction uses a bromide source to generate a Br(I) catalyst in situ from a benign terminal oxidant such as sodium chlorite. The reaction is of great scope and surpasses the transition-metal catalyses developed so far for these types of reactions.

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15

Kukielka, E., and A. I. Cederbaum. "DNA strand cleavage as a sensitive assay for the production of hydroxyl radicals by microsomes: role of cytochrome P4502E1 in the increased activity after ethanol treatment." Biochemical Journal 302, no. 3 (1994): 773–79. http://dx.doi.org/10.1042/bj3020773.

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There is increasing interest in the role of reactive oxygen radicals in the hepatotoxicity associated with ethanol consumption. Reactive oxygen intermediates interact with DNA and can cause single-strand breaks of supercoiled DNA. Experiments were carried out to evaluate the utility of this system as a sensitive assay for the detection of potent oxidants generated by rat liver microsomes isolated from pair-fed control rats and rats treated chronically with ethanol. DNA strand cleavage was assayed by monitoring the migration of the supercoiled and open circular forms in agarose. Microsomes cata

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16

Rindler, Paul M., Angela Cacciola, Michael Kinter, and Luke I. Szweda. "Catalase-dependent H2O2consumption by cardiac mitochondria and redox-mediated loss in insulin signaling." American Journal of Physiology-Heart and Circulatory Physiology 311, no. 5 (2016): H1091—H1096. http://dx.doi.org/10.1152/ajpheart.00066.2016.

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We have recently demonstrated that catalase content in mouse cardiac mitochondria is selectively elevated in response to high dietary fat, a nutritional state associated with oxidative stress and loss in insulin signaling. Catalase and various isoforms of glutathione peroxidase and peroxiredoxin each catalyze the consumption of H2O2. Catalase, located primarily within peroxisomes and to a lesser extent mitochondria, has a low binding affinity for H2O2relative to glutathione peroxidase and peroxiredoxin. As such, the contribution of catalase to mitochondrial H2O2consumption is not well understo

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17

Wang, Zheng, Gregory A. Solan, Yanping Ma, Qingbin Liu, Tongling Liang, and Wen-Hua Sun. "Fusing Carbocycles of Inequivalent Ring Size to a Bis(imino)pyridine-Iron Ethylene Polymerization Catalyst: Distinctive Effects on Activity, PE Molecular Weight, and Dispersity." Research 2019 (October 16, 2019): 1–15. http://dx.doi.org/10.34133/2019/9426063.

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The 4,6-bis(arylimino)-1,2,3,7,8,9,10-heptahydrocyclohepta[b]quinoline-iron(II) chlorides (aryl = 2,6-Me2C6H3Fe1; 2,6-Et2C6H3Fe2; 2,6-i-Pr2C6H3Fe3; 2,4,6-Me3C6H2Fe4; and 2,6-Et2-4-Me2C6H2Fe5) have been prepared in good yield by a straightforward one-pot reaction of 2,3,7,8,9,10-hexahydro-1H-cyclohepta[b]quinoline-4,6-dione, FeCl2·4H2O, and the appropriate aniline in acetic acid. All ferrous complexes have been characterized by elemental analysis and FT-IR spectroscopy. In addition, the structure of Fe3 has been determined by single crystal X-ray diffraction, which showed the iron center to ado

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18

Melki, Rafik, Nadia Aïcha Laoufi, and Abdelkader Mouheb. "Effects of iron ions, doping methods and nanotubular morphology on TiO2 solar photocatalytic performance." Water Science and Technology 83, no. 12 (2021): 3020–32. http://dx.doi.org/10.2166/wst.2021.182.

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Abstract The effects of Fe2+ and Fe3+ as TiO2 cocatalysts were studied, and the experimental results showed that Fe3+ was more efficient than Fe2+, which needed an intermediate reaction to produce hydroxyl radicals. TiO2 was modified with the aim of improving its structural, optical, and adsorption properties, thus improving its photocatalytic performance. The light range of the catalyst activation process was expanded, which increased the catalyst's ability to absorb visible light. Consequently, this study exploits solar energy in photocatalysis by Fe ion doping using different methods, inclu

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Ghorbel, Mouna, Kaouthar Feki, Sana Tounsi, Najla Haddaji, Moez Hanin, and Faiçal Brini. "The Activity of the Durum Wheat (Triticum durum L.) Catalase 1 (TdCAT1) Is Modulated by Calmodulin." Antioxidants 11, no. 8 (2022): 1483. http://dx.doi.org/10.3390/antiox11081483.

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Plant catalases (CAT) are involved in the cellular scavenging of the reactive oxygen species during developmental processes and in response to abiotic and biotic stresses. However, little is known about the regulation of the CAT activity to ensure efficient antioxidant function. Using bioinformatic analyses, we showed that durum wheat catalase 1 (TdCAT1) harbors highly conserved cation-binding and calmodulin binding (CaMBD) domains which are localized at different positions of the protein. As a result, the catalytic activity of TdCAT1 is enhanced in vitro by the divalent cations Mn2+ and Fe2+

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Yang, Ruiguang, Guiying Li, and Changwei Hu. "The preparation of Fe/wood-based activated carbon catalyst for phenol hydroxylation from Fe2+ and Fe3+ precursors." Catalysis Science & Technology 5, no. 4 (2015): 2486–95. http://dx.doi.org/10.1039/c4cy01705f.

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21

Milgrom, Lionel. "Why is catalase so fast?" International Journal of High Dilution Research - ISSN 1982-6206 15, no. 4 (2021): 38. http://dx.doi.org/10.51910/ijhdr.v15i4.865.

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ded network of hydrogen-bonded water and H2O2 molecules, stretching out far beyond the enzymesâ€™ active sites, into the cell's internal aqueous medium. As catalases function, they provide coherent oxidative â€˜pulsesâ€™, which rapidly spread throughout the H-bonded network, effectively â€˜unzippingâ€™ H2O2Â molecules as far as they extend from the enzyme. Result/discussion: This 'memory-of-water'-like mechanism predicts catalase H2O2 disproportionation should occur outside the enzyme. An experimental protocol is proposed to test this prediction. If successful, it would suggest a) holist

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Jia, Xianbo, Jichen Chen, Chenqiang Lin, and Xinjian Lin. "Cloning, Expression, and Characterization of a Novel Thermophilic Monofunctional Catalase fromGeobacillussp. CHB1." BioMed Research International 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/7535604.

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Catalases are widely used in many scientific areas. A catalase gene (Kat) fromGeobacillussp. CHB1 encoding a monofunctional catalase was cloned and recombinant expressed inEscherichia coli(E. coli), which was the first time to clone and express this type of catalase ofgenus Geobacillusstrains as far as we know. ThisKatgene was 1,467 bp in length and encoded a catalase with 488 amino acid residuals, which is only 81% similar to the previously studiedBacillussp. catalase in terms of amino acid sequence. Recombinant catalase was highly soluble inE. coliand made up 30% of the totalE. coliprotein.

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23

Tsai, Meng-Che, Yohannes Ayele Awoke, Wei-Nien Su, and Bing Joe Hwang. "Value-Added Electrolysis Hydrogen Production Via Methanol Oxidation over a Synergetic Pt₁-W Dual-Site Catalyst." ECS Meeting Abstracts MA2024-01, no. 35 (2024): 1923. http://dx.doi.org/10.1149/ma2024-01351923mtgabs.

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Electrochemical water splitting is a promising way of generating hydrogen for future sustainable green energy source technology options to replace nonrenewable and environmentally pollutant hydrocarbon energy sources. However, due to its high overpotential in oxygen evolution reaction (OER) and low-value product O2, some candidate anodic reactions with low potential should be proposed to replace OER, such as alcohol oxidation. Unlike fuel cell applications, partial oxidation is preferred to achieve high-value products rather than complete oxidation. For this purpose, we design a synergistic ef

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Nasuha, Norhaslinda, and B. H. Hameed. "Effects of Substituted Transition Metals (Me:Cr³⁺, Mn³⁺, Fe³⁺ and Mo) on the Fe²⁺/Modified Silica in the Oxidative Degradation of Reactive Black 5." Applied Mechanics and Materials 802 (October 2015): 531–36. http://dx.doi.org/10.4028/www.scientific.net/amm.802.531.

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The Fe2+/modified silica catalysts have been substituted with four types of transition metals such as Fe3+, Cr3+, Mn3+ and Mo. The catalytic activity of these catalysts has been tested for the oxidative degradation of Reactive Black 5 (RB5) at 30°C and pH 4.5. The substituted Fe2+/modified silica with Fe3+ (Fe2+:Fe3+/ m-SiO2) exhibited the highest catalytic performance compared to others transition metals by degrading the RB5 nearly to 95%. This catalyst possessed on high stability by maintaining its performance during the three successive cycles of reaction. These findings can be ascribed to

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Khanh, Huynh Hoang Nhu, Vo Thi Dieu Trang, Pham Duc Thinh, and Pham Trung San. "CATALYTIC CONDITIONS OF FUCOIDAN DEGRADING ENZYMES FROM VASTICARDIUM FLAVUM." Vietnam Journal of Science and Technology 57, no. 1 (2019): 28. http://dx.doi.org/10.15625/2525-2518/57/1/12249.

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The fucoidanase from the digestive glands of the marine shell Vasticardium flavum was studied. The fucoidanase catalysed the hydrolysis of 1→3-L-fucan from sea cucumbers Stichopus variegatus, Holothuria spinifera, did not catalyze the hydrolysis of fucoidan from F. evanescens and F. vesiculosus containing alternating α-1→4 and α-1→3 glycoside bonds. This enzyme also did not catalyze the hydrolysis of fucoidan from U. pinnatifida, S. mcclurei, which belong to the galactofucan group. Optima of pH and time incubation were at 3-4 and 24 hours, respectively. The enzyme activity was significantly in

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Wang, Xilin, and Dexin Liu. "Study on Photocatalytic Degradation of Rhodamine B by Modified Red Mud Catalyst with Biochar." European Journal of Sustainable Development 14, no. 2 (2025): 877. https://doi.org/10.14207/ejsd.2025.v14n2p877.

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In this work, a red mud(RM)-coffee grounds(CGs) pyrolysis composite material (RC-PC) was prepared and applied to the study of photocatalytic Fenton degradation of organic pollutants. The results of SEM, TEM, and XRD analyses show that during the pyrolysis process, the coffee residue is transformed into biochar with a porous structure, and the hematite in the RM is stepwise reduced to Fe3O4 and Fe0. In the experiment of degrading Rhodamine B (RhB) under simulated visible light conditions, after 30 minutes of reaction, RhB exhibited a degradation efficiency of 94.8% in the light condition, signi

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Tisa, Farhana, Abdul Aziz Abdul Raman, and Wan Mohd Ashri Wan Daud. "Simulation for Supporting Scale-Up of a Fluidized Bed Reactor for Advanced Water Oxidation." Scientific World Journal 2014 (2014): 1–17. http://dx.doi.org/10.1155/2014/348974.

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Simulation of fluidized bed reactor (FBR) was accomplished for treating wastewater using Fenton reaction, which is an advanced oxidation process (AOP). The simulation was performed to determine characteristics of FBR performance, concentration profile of the contaminants, and various prominent hydrodynamic properties (e.g., Reynolds number, velocity, and pressure) in the reactor. Simulation was implemented for 2.8 L working volume using hydrodynamic correlations, continuous equation, and simplified kinetic information for phenols degradation as a model. The simulation shows that, by using Fe3+

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Huang, Yao-Hui, Chun-Ping Huang, Yu-Wen Lu, and Chun-Yu Lo. "Oxidation and immobilization of iron and manganese by a fluidized bed reactor." Water Supply 9, no. 6 (2009): 619–25. http://dx.doi.org/10.2166/ws.2009.677.

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An iron and manganese species immobilization technology was developed in a fluidized bed reactor (FBR) with a new fluidized media, immobilized iron oxide (namely FeOx-30). The FeOx-30 catalyst exhibited excellent performance as a catalyst for the oxidation of Mn2 + . About 95% and 30% of the manganese species were immobilized on FeOx-30 and silica sand in FBR, respectively. The oxidation rates of Fe2 + and Mn2 + and the immobilization efficiencies of iron and manganese oxides strongly depend on pH value. Usually during oxidization the pH values of the solution containing Fe2 + must be above 7,

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Palumbo, A., G. Misuraca, M. D'Ischia, and G. Prota. "Effect of metal ions on the kinetics of tyrosine oxidation catalysed by tyrosinase." Biochemical Journal 228, no. 3 (1985): 647–51. http://dx.doi.org/10.1042/bj2280647.

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The conversion of tyrosine into dopa [3-(3,4-dihydroxyphenyl)alanine] is the rate limiting step in the biosynthesis of melanins catalysed by tyrosinase. This hydroxylation reaction is characterized by a lag period, the extent of which depends on various parameters, notably the presence of a suitable hydrogen donor such as dopa or tetrahydropterin. We have now found that catalytic amounts of Fe2+ ions have the same effect as dopa in stimulating the tyrosine hydroxylase activity of the enzyme. Kinetic experiments showed that the shortening of the induction time depends on the concentration of th

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Aniokete, T. C., V. O. Aniaku, and M. O. Daramola. "Experimental and Mathematical Modelling of Conversion of Animal Fat Oil into Biodiesel Over Waste-Derived Hydroxy Sodalite in a Fixed-Bed Bioreactor." American Journal of Applied Sciences and Engineering 4, no. 1 (2023): 50–62. https://doi.org/10.5281/zenodo.8248527.

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<em>An experimental and mathematical modelling of conversion of animal fat oil (AFO) to biodiesel using waste-derived hydroxy sodalite (HSOD) catalyst in a fixed-bed reactor was conducted. A modified three step Eley-Rideal reaction model was employed and previous studies carried out using a batch reactor with AFO catalyzed by waste-derived HSOD provided some preliminary experimental and reaction kinetics data. A comparism of the kinetic performance of the batch and continuous fixed bed reactor (FBR) processes were investigated to further understand the overall conversion performance with the w

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Porter, A. J., C. H. Botchway, B. Kwakye-Awuah, et al. "Local and nanoscale methanol mobility in different H-FER catalysts." Catalysis Science & Technology 12, no. 5 (2022): 1663–77. http://dx.doi.org/10.1039/d1cy02001c.

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Methanol dynamics in commercial and natural kaolin synthesised FER zeolite catalysts were probed using quasielastic neutron scattering and molecular modelling. Significant differences are observed due to the induced changes in catalyst composition.

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Futó, Judit Edit, and Anna Lovász. "The Long Road Towards Women’s Equality in the Labour Market : Claudia Goldin’s Research on Historical Trends and Contributing Factors." Financial and Economic Review 23, no. 1 (2024): 135–54. http://dx.doi.org/10.33893/fer.23.1.135.

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Claudia Goldin won the 2023 Nobel Prize in Economics for her research on women in the labour market. Her body of work provides a broad, data-driven, historical overview of gender inequalities and evidence of the impacts of specific changes and institutional elements. We review her main findings regarding the evolution of women’s employment and earnings in light of key historical events. She documented a U-shaped labour supply curve over time, which challenged past notions of a monotonous positive relationship between economic development and women’s labour supply. Her work brought attention to

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Khazzal Hummadi, Khalid, Karim H. Hassan, and Phillip C. H. Mitchell. "Selectivity and Activity of Iron Molybdate Catalysts in Oxidation of Methanol." Journal of Engineering Research [TJER] 6, no. 1 (2009): 1. http://dx.doi.org/10.24200/tjer.vol6iss1pp1-7.

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The selectivity and activity of iron molybdate catalysts prepared by different methods are compared with those of a commercial catalyst in the oxidation of methanol to formaldehyde in a continuous tubular bed reactor at 200-350 oC (473-623 oK), 10 atm (1013 kPa), with a methanol-oxygen mixture fixed at 5.5% by volume methanol: air ratio. The iron(III) molybdate catalyst prepared by co-precipitation and filtration had a selectivity towards formaldehyde in methanol oxidation comparable with a commercial catalyst; maximum selectivity (82.3%) was obtained at 573oK when the conversion was 59.7%. Ca

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Huszár, Bianka, Réka Henyecz, Zoltán Mucsi, and György Keglevich. "MW-Promoted Cu(I)-Catalyzed P–C Coupling Reactions without the Addition of Conventional Ligands; an Experimental and a Theoretical Study." Catalysts 11, no. 8 (2021): 933. http://dx.doi.org/10.3390/catal11080933.

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An experimental and a theoretical study on the so far less investigated Cu(I) salt-catalyzed Hirao reaction of iodobenzene and diarylphosphine oxides (DAPOs) revealed that Cu(I)Br or Cu(I)Cl is the most efficient catalyst under microwave irradiation. The optimum conditions included 165 °C and a 1:2 molar ratio for DAPOs and triethylamine. The possible ligations of Cu(I) were studied in detail. Bisligated P---Cu(I)---P (A), P---Cu(I)---N (B) and N---Cu(I)---N (C) complexes were considered as the catalysts. Calculations on the mechanism suggested that complexes A and B may catalyze the P–C coupl

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35

Zhang, Yuchen, Xigai Jia, Ziyang Kang, et al. "Degradation of Tetracycline in Water by Fe-Modified Sterculia Foetida Biochar Activated Peroxodisulfate." Sustainability 14, no. 19 (2022): 12097. http://dx.doi.org/10.3390/su141912097.

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Tetracycline (TC) is a broad-spectrum antibiotic commonly, made use of in aquaculture and animal husbandry. After entering water bodies, it will represent a major threat to human health. In this study, sterculia foetida biochar (SFC) was readied by the combined hydrothermal pyrolysis (co-HTP) method with sterculia foetida as raw materials. Fen-SFC (Fe2-SFC, Fe3-SFC, and Fe4-SFC) was obtained by doping SFH with different concentrations of FeCl3. Finally, activation of peroxodisulfate (PDS) was achieved, using Fe3-SFC to degrade TC. The degradation of TC obeyed pseudo-second-order kinetics, and

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Metcalfe, D. D., H. L. Thompson, S. J. Klebanoff, and W. R. Henderson. "Oxidative degradation of rat mast-cell heparin proteoglycan." Biochemical Journal 272, no. 1 (1990): 51–57. http://dx.doi.org/10.1042/bj2720051.

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The susceptibility of rat mast-cell heparin to oxidative degradation was examined. Heparin as a component of intact mast-cell granules (MCG) was degraded following ingestion by normal human neutrophils. In contrast, neutrophils from patients with chronic granulomatous disease (CGD), which do not respond to stimulation with respiratory-burst activity, exhibited a greatly diminished ability to degrade phagocytosed MCG heparin. MCG-associated heparin also was cleaved by H2O2 plus Fe2+ (Fenton's reagent). Isolated heparin proteoglycan (average Mr approx. 750,000) was rapidly cleaved to smaller mol

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Antia, David D. J. "Conversion of Waste Synthesis Gas to Desalination Catalyst at Ambient Temperatures." Waste 1, no. 2 (2023): 426–54. http://dx.doi.org/10.3390/waste1020026.

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In this study, a continuous flow of a synthetic, dry, and acidic waste synthesis gas (WSG) (containing N2, H2, CO, CH4, and CO2) at ambient temperatures was first passed through a fixed bed reactor (FBR) containing halite + m-Fe0 and then a saline bubble column diffusion reactor (BCDR) containing m-Fe0. The FBR converted 47.5% of the CO + CH4 + CO2 into n-C0. Passage of the n-C0 into the BCDR resulted in the formation of the desalination catalyst (Fe0:Fe(a,b,c)@C0) + CH4 + CO + CO2 + CxHy, where 64% of the feed n-C0 was converted to gaseous products. The desalination pellets can remove >60%

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Duan, Xiaoxu, Jinxiao Dou, Yongqi Zhao, Salman Khoshk Rish, and Jianglong Yu. "A Study on Mn-Fe Catalysts Supported on Coal Fly Ash for Low-Temperature Selective Catalytic Reduction of NOX in Flue Gas." Catalysts 10, no. 12 (2020): 1399. http://dx.doi.org/10.3390/catal10121399.

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A series of Mn0.15Fe0.05/fly-ash catalysts have been synthesized by the co-precipitation method using coal fly ash (FA) as the catalyst carrier. The catalyst showed high catalytic activity for low-temperature selective catalytic reduction (LTSCR) of NO with NH3. The catalytic reaction experiments were carried out using a lab-scale fixed-bed reactor. De-NOx experimental results showed the use of optimum weight ratio of Mn/FA and Fe/FA, resulted in high NH3-SCR (selective catalytic reduction) activity with a broad operating temperature range (130–300 °C) under 50000 h−1. Various characterization

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Hao, Shijie, Yandi Cai, Chuanzhi Sun, Jingfang Sun, Changjin Tang, and Lin Dong. "High Resistance of SO2 and H2O over Monolithic Mn-Fe-Ce-Al-O Catalyst for Low Temperature NH3-SCR." Catalysts 10, no. 11 (2020): 1329. http://dx.doi.org/10.3390/catal10111329.

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Monolithic Mn-Fe-Ce-Al-O catalyst with honeycomb cordierite ceramic as a carrier was reported for the first time for low temperature deNOx application. In the reaction of selective catalytic reduction (SCR) of NO with NH3, a NO conversion of above 80% at 100 °C was obtained. Notably, the catalyst also showed excellent resistance against SO2 and H2O. About 60% NO conversion was maintained after successive operation in the mixed stream of SO2 and H2O for 168 h. The Brunner−Emmet−Teller (BET) measurement, SEM, EDS, thermogravimetric analysis (TG), FT-IR, and XPS results of the used catalysts indi

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Stathi, Panagiota, George Mitrikas, Yiannis Sanakis, Maria Louloudi, and Yiannis Deligiannakis. "Back-clocking of Fe2+/Fe1+spin states in a H2-producing catalyst by advanced EPR." Molecular Physics 111, no. 18-19 (2013): 2942–49. http://dx.doi.org/10.1080/00268976.2013.798045.

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Ha, Bui Manh. "Oxidation of diazinon by homogeneous fenton process." Tạp chí Khoa học 16, no. 3 (2019): 5. http://dx.doi.org/10.54607/hcmue.js.16.3.2466(2019).

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The degradation of aqueous diazinon from an aqueous solution using H2O2/Fe2+ process is performed in a 1L batch chemical reactor. The extent of diazinon degradation (20 mg/L) has been investigated from a known initial pH solution, temperature and catalyst type (Fe2+, Fe3+) and for various initial concentrations of diazinon, H2O2 and Fe2+. The degradation efficiency was obtained (90.82% and 90.63%) at pH 3 and 4 of the initial solution respectively while catalyst type and reaction temperature have a slight impact on the final degradation of diazinon. Efficiency of diazinon removal can be enhanc

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Han, Mingyang, Qiuyue Zhang, Ivan I. Oleynik, et al. "Adjusting Ortho-Cycloalkyl Ring Size in a Cycloheptyl-Fused N,N,N-Iron Catalyst as Means to Control Catalytic Activity and Polyethylene Properties." Catalysts 10, no. 9 (2020): 1002. http://dx.doi.org/10.3390/catal10091002.

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Five examples of bis(arylimino)tetrahydrocyclohepta[b]pyridine dichloroiron(II) complex, [2-{(Ar)N=CMe}-9-{N(Ar)}C10H10N]FeCl2 (Ar = 2-(C5H9)-4,6-(CHPh2)2C6H2Fe1, 2-(C6H11)-4,6-(CHPh2)2C6H2Fe2, 2-(C8H15)-4,6-(CHPh2)2C6H2Fe3, 2-(C12H23)-4,6-(CHPh2)2C6H2Fe4, and 2,6-(C5H9)2-4-(CHPh2)C6H2Fe5), incorporating ortho-pairings based on either benzhydryl/cycloalkyl (ring sizes ranging from 5 to 12) or cyclopentyl/cyclopentyl groups, have been prepared in reasonable yield by employing a simple one-pot template strategy. Each complex was characterized by FT-IR spectroscopy, elemental analysis, and for Fe

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Yi, Jiali, Junjun Xu, Jiatong Liu, Yue Zheng, and Qiong Wang. "High-Efficient Elimination of Spiramycin by Fe3O4/ZSM-5/Sch via Heterogeneous Photo-Fenton Oxidation at Neutral pH." Sustainability 15, no. 16 (2023): 12343. http://dx.doi.org/10.3390/su151612343.

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Spiramycin (SPM), a widely employed antibiotic in both clinical therapy and the livestock industry, poses significant challenges in terms of safe and efficacious management. A heterogeneous photo-Fenton system, devised using Schwertmannite (Sch), can effectively degrade contaminants. However, it is accompanied by a relatively low conversion efficiency of ≡Fe3+/≡Fe2+ and a significant iron loss. In this study, a catalyst featuring Fe3O4 and ZSM-5 molecular sieve-modified Sch (Fe3O4/ZSM-5/Sch) was devised to enhance the catalytic activity and stability. The findings revealed that Fe3O4/ZSM-5/Sch

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Fan, Jinlong, Xuedong Zhu, Fan Yang, Yarong Xu, and Lantian Chen. "Seeds Combining Pyrrolidine Control the Framework Al Distribution of FER Zeolite to Enhance Its Performance in the Skeletal Isomerization of n-Butene." Catalysts 14, no. 10 (2024): 697. http://dx.doi.org/10.3390/catal14100697.

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FER zeolites have a unique framework structure and acid distribution, and are widely studied as a catalyst for reactions such as n-butene skeletal isomerization and dimethyl ether carbonylation. The Brönsted acid site (BAS) located in the 10-member ring (10-MR) of FER zeolites serves as the active site for the isomerization reaction of skeletal n-butene to produce isobutene. This study prepared five types of FER zeolites using different methods: using pyrrolidine (PY) alone as a template; using Na-form FER as seeds (SN) or H-form FER as seeds without organic structure directing agents (OSDAs);

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45

Hu, Sihai, Yaoguo Wu, Hairui Yao, Cong Lu, and Chengjun Zhang. "Enhanced Fenton-like removal of nitrobenzene via internal microelectrolysis in nano zerovalent iron/activated carbon composite." Water Science and Technology 73, no. 1 (2015): 153–60. http://dx.doi.org/10.2166/wst.2015.467.

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The efficiency of Fenton-like catalysis using nano zerovalent iron (nZVI) is limited by nZVI aggregation and activity loss due to inactive ferric oxide forming on the nZVI surface, which hinders electron transfer. A novel iron–carbon composite catalyst consisting of nZVI and granular activated carbon (GAC), which can undergo internal iron–carbon microelectrolysis spontaneously, was successfully fabricated by the adsorption–reduction method. The catalyst efficiency was evaluated in nitrobenzene (NB) removal via the Fenton-like process (H2O2-nZVI/GAC). The results showed that nZVI/GAC composite

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46

Lee, Mihwa, Donggeun Yoo, and Kwonpil Park. "Analysis of Binder Degradation By Measuring Fluorine Emission Rate in PEMFC MEA Made with Speek Membrane and Nafion Binder." ECS Meeting Abstracts MA2024-02, no. 67 (2024): 4685. https://doi.org/10.1149/ma2024-02674685mtgabs.

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In fuel cell vehicles for large commercial vehicles that require high power, oxygen must be sufficiently transmitted through the binder to the catalyst surface in the catalyst layer of the stack, and the durability of the binder must be high. Although research is actively underway to improve the durability of binders, an in-situ durability evaluation method for binders has not yet been established. In this study, a study was conducted to accelerate degradation of the catalyst layer using Nafion as a binder with hydrocarbon-based sPEEK membrane and measure the binder degradation rate (FER, Fluo

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Wild, Stefan, Sabrina Polierer, Thomas A. Zevaco, et al. "Direct DME synthesis on CZZ/H-FER from variable CO2/CO syngas feeds." RSC Advances 11, no. 5 (2021): 2556–64. http://dx.doi.org/10.1039/d0ra09754c.

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Catalyst systems for the conversion of synthesis gas, which are tolerant to fluctuating CO/CO<sub>2</sub> gas compositions, have great potential for process-technical applications, related to the expected changes in the synthesis gas supply.

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Tang, Juntao, Taotao Zhou, Zhiqiao He, Feilong Dong, Xiaoying Li, and Shuang Song. "Carbonized eggshell membranes as highly active co-catalyst with Fe3+/persulfate for boosting degradation of carbamazepine by accelerating Fe3+/Fe2+ cycle." Separation and Purification Technology 332 (March 2024): 125725. http://dx.doi.org/10.1016/j.seppur.2023.125725.

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Lin, Y. T., and M. C. Lu. "Catalytic action of goethite in the oxidation of 2-chlorophenols with hydrogen peroxide." Water Science and Technology 55, no. 12 (2007): 101–6. http://dx.doi.org/10.2166/wst.2007.386.

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The use of goethite and hydrogen peroxide was recently found to effectively oxidise organic compounds. This research was to investigate the effect of adsorption, pH, Fe2 + and Fe3 + on 2-CP oxidation. Results indicated that 2-CP can be decomposed with hydrogen peroxide catalysed by goethite and the oxidation rate increased with decreasing goethite particle size. The optimum oxidation rate was observed at the pH below 3.0.Addition of Fe2 + and Fe3 + can enhance the catalytic oxidation rate of 2-CP very efficiently. The main mechanism of goethite catalysing hydrogen peroxide to oxidise 2-CP may

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Margi, Nikhil H., and Ganapati D. Yadav. "Design and Development of Novel Continuous Flow Stirred Multiphase Reactor: Liquid–Liquid–Liquid Phase Transfer Catalysed Synthesis of Guaiacol Glycidyl Ether." Processes 8, no. 10 (2020): 1271. http://dx.doi.org/10.3390/pr8101271.

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Phase transfer catalysed (PTC) reactions are used in several pharmaceutical and fine chemical industrial processes. We have developed a novel stirred tank reactor (Yadav reactor) to conduct batch and continuous liquid–liquid–liquid (L-L-L) PTC reactions. The reactor had a provision of using three independent stirrers for each phase, thereby having complete control over the rate of mass transfer across the two interfaces. In the continuous mode of operation, the top and bottom phases were continuously fed into the reactor while the middle phase was used as a batch. All three stirrers were used

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