Russian Journal of Applied Chemistry最新文献_第6页

Kinetic Simulation of Amine Synthesis from Carbon Oxides: Investigation of Ammonia’s Effect on Product Distribution 碳氧化物合成胺的动力学模拟：氨对产物分布影响的研究

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2026-03-02 DOI: 10.1134/S1070427226010015

A. V. Starozhitskaya, O. S. Dement’eva, S. D. Bazhenov

{"title":"Kinetic Simulation of Amine Synthesis from Carbon Oxides: Investigation of Ammonia’s Effect on Product Distribution","authors":"A. V. Starozhitskaya, O. S. Dement’eva, S. D. Bazhenov","doi":"10.1134/S1070427226010015","DOIUrl":"10.1134/S1070427226010015","url":null,"abstract":"The work proposes a simplified kinetic model for Fischer–Tropsch synthesis from CO2, incorporating the reverse water-gas shift reaction and generalized steps for the formation of methane, C2–C4 hydrocarbons, and the C5⁺ fraction. The kinetic parameters of the model were determined based on experimental data in the temperature range of 260–320°C and pressures of 20–30 atm by solving the inverse chemical kinetics problem using a combination of a genetic algorithm and the Levenberg–Marquardt method. It is shown that the reverse water-gas shift reaction under the studied conditions does not reach thermodynamic equilibrium and limits the overall conversion of CO2. The analysis of activation energies explains the observed decrease in selectivity towards heavy hydrocarbons in favor of lighter fractions with increasing temperature. Comparing the calculated data (for pure CO2) with experimental results obtained when feeding ammonia made it possible to estimate the contribution of amination reactions. It was revealed that in the presence of ammonia, a reduction in the selectivity of methane formation as the main undesirable reaction product is achieved.","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 1","pages":"13 - 21"},"PeriodicalIF":0.6,"publicationDate":"2026-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Effect of Graphite Properties on Reversible Capacitance and Coulomb Efficiency 石墨性质对可逆电容和库仑效率的影响

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2026-03-02 DOI: 10.1134/S1070427226010039

E. Kuzmina, A. Yusupova, N. Egorova, E. Gaifullina, V. Kolosnitsyn, A. Samodurov, V. Arkhipov, A. Kudashov

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Hydrothermally Engineered Covellite (CuS) Nanoplates with Superior Chemocatalytic and Photocatalytic Responses 具有优异化学催化和光催化反应的水热工程Covellite （cu）纳米板

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2026-03-02 DOI: 10.1134/S1070427225603195

Deepthi S. Nair, V. M. Anandakumar

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The Effect of the Sodium Introduction Method on the Acid-Base and Adsorption Properties of Alumina 钠引入法对氧化铝酸碱及吸附性能的影响

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2026-03-02 DOI: 10.1134/S1070427225601615

Eugene P. Meshcheryakov, Mariya P. Shcherbakova-Sandu, Irina A. Vasilyeva, Irina A. Kurzina

{"title":"The Effect of the Sodium Introduction Method on the Acid-Base and Adsorption Properties of Alumina","authors":"Eugene P. Meshcheryakov, Mariya P. Shcherbakova-Sandu, Irina A. Vasilyeva, Irina A. Kurzina","doi":"10.1134/S1070427225601615","DOIUrl":"10.1134/S1070427225601615","url":null,"abstract":"We investigated the effect of sodium cation modification on the acid-base and adsorption properties of alumina synthesized via centrifugal thermal activation of gibbsite. Two methods of modification were compared: post-synthesis impregnation of finished granules and in situ incorporation of sodium cations during the hydration stage of the precursor. The resulting adsorbents were characterized using X-ray diffraction (XRD) and low-temperature nitrogen adsorption. Their acid-base properties were assessed using a pH-metric method and X-ray photoelectron spectroscopy (XPS). All of the samples obtained consisted of low-temperature modifications, had a specific surface area above 200 m2/g, and were characterized by the presence of small mesopores (2–15 nm). The surface basicity of the alumina samples was found to increase directly with the concentration of introduced sodium, as quantified by the isoionic point pH (pHiip). A strong correlation was observed between the XPS data and the pH-metric method results, confirming the applicability of XPS for evaluating the acid-base characteristics of modified adsorbents. The experimental data on the effect of introducing sodium into alumina on water vapor adsorption were compared with previous results obtained by researchers using various modification methods. The results demonstrated that dynamic water vapor adsorption capacity is influenced by the characteristics of Al2O3 and the method of sodium introduction. The most effective method for modifying aluminum oxide is introducing it at the hydration stage during synthesis. The results demonstrate the possibility of controlling the adsorption properties of alumina by varying the concentration of sodium cations and the synthesis conditions.","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 2","pages":"61 - 70"},"PeriodicalIF":0.6,"publicationDate":"2026-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biological Activity of Quaternary Ammonium Salts Containing a 1,3-Dioxacycloalkane or a gem-Dichlorocyclopropane Moieties 含有1,3-二氧环烷或宝石-二氯环丙烷基团的季铵盐的生物活性

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2026-02-12 DOI: 10.1134/S107042722512002X

G. Z. Raskil’dina, Yu. G. Borisova, A. N. Vereshchagin, E. V. Detusheva, R. M. Sultanova, S. S. Zlotskii

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Synthesis, Characterization, and Evaluation of Biological Activity of Dihydroquinazoline-4-one and 1,3-Benzothiazine-4-one Derivatives 二氢喹唑啉-4- 1和1,3-苯并噻嗪-4- 1衍生物的合成、表征及生物活性评价

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2026-02-12 DOI: 10.1134/S1070427225600956

Wasan K. Damdoom, Oday H. R. Al-Jeilawi, Maha D. Azeez

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Hydrogen Production by Methane Autothermal Pyrolysis in a Moving Bed Reactor with Separate Supply of Reactants 分离供料移动床反应器甲烷自热热解制氢研究

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2026-02-12 DOI: 10.1134/S1070427225120031

Weixing Zhou, Yi Lu, Zhenjian Jia, I. V. Sedov, E. A. Salgansky

引用次数: 0

Catalytic Dehydration of Isomeric Phenylethanols on Alumina in the Presence of Excess Water 过量水存在下氧化铝上异构苯乙醇的催化脱水

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2026-02-12 DOI: 10.1134/S1070427225602335

E. A. Karalin, G. G. Elimanova, A. G. Abramov, O. V. Zhdaneev

{"title":"Catalytic Dehydration of Isomeric Phenylethanols on Alumina in the Presence of Excess Water","authors":"E. A. Karalin, G. G. Elimanova, A. G. Abramov, O. V. Zhdaneev","doi":"10.1134/S1070427225602335","DOIUrl":"10.1134/S1070427225602335","url":null,"abstract":"In the process of coproduction of propylene oxide and styrene (PO/SM), a stream containing isomeric phenylethanols is fed to the dehydration stage. In this work, the contribution of acid sites of different nature and strength to the activity of aluminum oxide-based catalysts in the dehydration reaction of 1- and 2-phenylethanols occurring in the presence of excess water in the temperature range of 230-300°C is compared. It was found that over the entire studied temperature range: the rate of intramolecular dehydration of the primary alcohol is significantly lower than the rate of dehydration of the secondary alcohol; the dehydrating activity of the catalysts with respect to both alcohols is determined primarily by acid sites of the LAS I and LAS II types; the temperature of manifestation of the dehydrating activity of LAS III type sites with respect to the primary alcohol is ~50°C higher compared to the secondary alcohol. The type of kinetic equation for the target reaction is substantiated, the values of the observed rate constants are calculated. It was found that for both alcohols the change in the pre-exponential factor is directly proportional to the change in the Arrhenius activation energy, while the observed activation energy of the dehydration reaction of the primary alcohol significantly exceeds the activation energy of the dehydration of the secondary alcohol.","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"98 12","pages":"613 - 622"},"PeriodicalIF":0.6,"publicationDate":"2026-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147338624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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One-Step Synthesis of a Silicon-substituted Norbornene Derivative Using the Bis-Silylation Reaction of Norbornadiene-2,5 with 1,1,1,2,2,2-Hexamethyldisilane 降冰片二烯-2,5与1,1,1,2,2,2-六甲基二硅烷双硅化反应一步合成硅取代降冰片烯衍生物

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2026-02-12 DOI: 10.1134/S1070427225120018

P. P. Lezhnin, M. V. Bermeshev

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Synthesis and Study of the Properties of an Optically Transparent Copolymer Based on Methyl 2-(4-Vinylphenyl)cyclopropane-1 Carboxylate and Butyl Methacrylate 2-（4-乙烯基苯基）甲基环丙烷-1羧酸甲酯与甲基丙烯酸丁酯光学透明共聚物的合成及性能研究

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2026-02-12 DOI: 10.1134/S1070427224604686

S. B. Mamedli, M. M. Mustafayev, A. G. Rahimli, D. R. Nurullayeva, R. V. Asadov

{"title":"Synthesis and Study of the Properties of an Optically Transparent Copolymer Based on Methyl 2-(4-Vinylphenyl)cyclopropane-1 Carboxylate and Butyl Methacrylate","authors":"S. B. Mamedli, M. M. Mustafayev, A. G. Rahimli, D. R. Nurullayeva, R. V. Asadov","doi":"10.1134/S1070427224604686","DOIUrl":"10.1134/S1070427224604686","url":null,"abstract":"An optically transparent copolymer based on methyl 2-(4-vinylphenyl)cyclopropane-1 carboxylate and butyl methacrylate has been synthesized. The copolymerization of these monomers has been carried out in the presence of a radical initiator in the mass and solution. The copolymerization constants (r1 = 0.68, r2 = 0.32) and activity parameters according to Q–e scheme (Q1 = 1.06; e1 = –1.0) have been calculated. The microstructure of the copolymer has been studied; at a ratio of the initial compounds equal to 0.25 : 0.25 (molar fractions), the blockiness parameter has a maximum value of R = 66.66%. The indices of the average molecular weights of the copolymer samples obtained under various copolymerization conditions vary in the ranges Mw = 97000–127500 and Mn = 64500–95200. The identification of the obtained compound by a method of IR and 1H NMR spectroscopy has been carried out, and the physical-mechanical properties have been evaluated. The degree of optical transparency nD20 = 1.5792 and light transmission of the copolymer has been determined (88–90%).","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"98 12","pages":"632 - 639"},"PeriodicalIF":0.6,"publicationDate":"2026-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147338626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0