Catalysis in Industry最新文献_第5页

Studying the Regularities of Ethylene Trimerization to Hexene-1 on a Chromium–Pyrrole Catalytic System 铬-吡咯催化体系中乙烯三聚制己烯-1的规律研究

IF 1.3

Catalysis in Industry Pub Date : 2026-02-27 DOI: 10.1134/S2070050425700412

E. E. Faingol’d, S. L. Saratovskikh, E. I. Knerel’man, A. N. Panin, O. N. Golodkov, I. V. Zharkov, P. I. Kul’chakovskii, N. S. Belinskaya, D. A. Lenev, N. M. Bravaya, I. V. Sedov

{"title":"Studying the Regularities of Ethylene Trimerization to Hexene-1 on a Chromium–Pyrrole Catalytic System","authors":"E. E. Faingol’d, S. L. Saratovskikh, E. I. Knerel’man, A. N. Panin, O. N. Golodkov, I. V. Zharkov, P. I. Kul’chakovskii, N. S. Belinskaya, D. A. Lenev, N. M. Bravaya, I. V. Sedov","doi":"10.1134/S2070050425700412","DOIUrl":"10.1134/S2070050425700412","url":null,"abstract":"This paper reports the results of ethylene trimerization to hexene-1 on a chromium–pyrrole catalytic system in semiperiodic and continuous regimes under varied reaction conditions. The effect of the catalyst concentration, temperature, and ethylene pressure on the kinetic profile of reaction rate–time curves is demonstrated. A generalized scheme is proposed for the process of ethylene trimerization to hexene-1. At the same time, it is shown that the kinetic data on the formation of reaction products are insufficient for the trimerization process to be completely described within the framework of a universal kinetic model due to a multistage character of this process, the experimental establishment of dependence for each stage (formation of catalytic intermediates, initiation, the occurrence of side reactions with participation of catalytic system components, tri-, oligo-, and polymerization reactions) and, thereby, due to variability in the catalytic behavior of the system.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"17 4","pages":"452 - 463"},"PeriodicalIF":1.3,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147342331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Properties of Sodium Hydroxide Modified Carbon Nanofibers in the Catalytic Decomposition of Formic Acid 氢氧化钠改性纳米碳纤维在甲酸催化分解中的性能研究

IF 1.3

Catalysis in Industry Pub Date : 2026-02-27 DOI: 10.1134/S207005042570028X

V. V. Chesnokov

引用次数: 0

Features of the Formation of Catalysts on the Basis of γ-Al2O3 Modified with Ca2+ and Ni2+ Ions Highly Active and Resistant to Carbonization in the Dry Reforming of Methane into Synthesis Gas: Relationship between Physicochemical and Catalytic Properties 高活性、耐碳化的Ca2+和Ni2+改性γ-Al2O3催化剂在甲烷干重整制合成气中的形成特点：理化性质与催化性能的关系

IF 1.3

Catalysis in Industry Pub Date : 2026-02-27 DOI: 10.1134/S2070050425700230

A. A. Shutilov, M. N. Simonov, V. E. Fedorova, A. S. Marchuk, I. P. Danilova, G. A. Zenkovets

{"title":"Features of the Formation of Catalysts on the Basis of γ-Al2O3 Modified with Ca2+ and Ni2+ Ions Highly Active and Resistant to Carbonization in the Dry Reforming of Methane into Synthesis Gas: Relationship between Physicochemical and Catalytic Properties","authors":"A. A. Shutilov, M. N. Simonov, V. E. Fedorova, A. S. Marchuk, I. P. Danilova, G. A. Zenkovets","doi":"10.1134/S2070050425700230","DOIUrl":"10.1134/S2070050425700230","url":null,"abstract":"It has been shown that, in the NixCa1 – xAl2O4 (x = 0.1–0.5) catalysts prepared by coprecipitation after calcination in air at a temperature of 700°C, an oxide compound with a defective structure of γ-Al2O3, in which Ni2+ and Ca2+ ions are stabilized, is formed along with highly dispersed NiAl2O4 and NiO moieties. During reduction in hydrogen at the pretreatment stage and further operation in the reaction medium, nickel is partially reduced to a metallic state and leaves the structure of the compound to form highly dispersed Ni0 particles of 3–15 nm in size on the surface. Calcium is stabilized in the structure of γ-Al2O3 and on its surface. The introduction of Ca leads to a significant increase in the concentration of not very stable surface and bulk carbonates and hydrocarbonates to promote the oxidation of C-containing intermediate compounds formed on Ni0 sites. In addition, the modification of Ca leads to a decrease in the concentration of strong acid sites on the surface, the formation of a weaker CO2 bond under reaction conditions, and the complete disappearance of signals from CO complexes with strong Lewis acid sites (LAS), which significantly reduces the amount of carbon formed at the stage of deposition on the surface. The obtained catalysts exhbit high activity and stable operation over a long period of time in the reaction of dry methane reforming (DMR).","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"17 4","pages":"333 - 344"},"PeriodicalIF":1.3,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147342238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Ethylene–Hexene-1 Copolymers with a Bimodal Molecular Mass Distribution and an Optimal Distribution of Branches on a Highly Active Supported Vanadium–Magnesium Catalyst 在高活性负载型钒镁催化剂上合成具有双峰分子质量分布和最佳支链分布的乙烯-己烯-1共聚物

IF 1.3

Catalysis in Industry Pub Date : 2026-02-27 DOI: 10.1134/S2070050425700266

T. B. Mikenas, V. A. Zakharov, M. A. Mats’ko

{"title":"Synthesis of Ethylene–Hexene-1 Copolymers with a Bimodal Molecular Mass Distribution and an Optimal Distribution of Branches on a Highly Active Supported Vanadium–Magnesium Catalyst","authors":"T. B. Mikenas, V. A. Zakharov, M. A. Mats’ko","doi":"10.1134/S2070050425700266","DOIUrl":"10.1134/S2070050425700266","url":null,"abstract":"A new and highly active vanadium–magnesium catalyst (VMC) modification is used to obtain data on the effect of the content of hydrogen and hexene-1 on catalyst activity, along with the structure of synthesized polymers. It is established that the formation of polyethylene with a broad bimodal molecular mass distribution (MMD) on VMC is due to that these catalysts have two groups of active sites with different reactivity in the reaction of polymer chain transfer with hydrogen. It is also found that the presence of hexene-1 during copolymerization additionally broadens the molecular mass distribution of the copolymer, due to its molecular mass falling predominantly in the low-molecular-weight region. As a result, active VMC sites that produce the high-molecular-weight polymer virtually do not participate in the chain transfer reaction with hexene-1. At the same time, these sites are more reactive in the reaction of hexene-1 insertion, raising the content of butyl branches in the high-molecular-weight fraction of copolymers. The revealed kinetic features of highly active VMCs show they are promising candidates for the synthesis of tube- and film-grade polyethylene using a single-reactor scheme, instead of the two reactors now employed in the production of bimodal polyethylene on traditional titanium–magnesium catalysts.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"17 4","pages":"376 - 385"},"PeriodicalIF":1.3,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147342455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cracking Catalyst Additives Based on МеОх/Al2O3 (Ме = Cu, Fe, Ce, Co, Mn, La) Systems to Decrease the Nitrogen Oxide Content in Generation Gases 基于МеОх/Al2O3 （Ме = Cu, Fe, Ce, Co, Mn, La）体系的裂解催化剂添加剂降低生成气体中氮氧化物含量

IF 1.3

Catalysis in Industry Pub Date : 2026-02-27 DOI: 10.1134/S2070050425700205

E. O. Kobzar’, T. V. Bobkova, O. V. Potapenko, M. O. Anan’eva, D. N. Ogurtsova, V. A. Koveza

{"title":"Cracking Catalyst Additives Based on МеОх/Al2O3 (Ме = Cu, Fe, Ce, Co, Mn, La) Systems to Decrease the Nitrogen Oxide Content in Generation Gases","authors":"E. O. Kobzar’, T. V. Bobkova, O. V. Potapenko, M. O. Anan’eva, D. N. Ogurtsova, V. A. Koveza","doi":"10.1134/S2070050425700205","DOIUrl":"10.1134/S2070050425700205","url":null,"abstract":"The effect of the nature of nitrogen-containing compounds introduced into a model cracking feedstock (n-hexadecane) on the composition of flue gases formed during catalyst regeneration has been studied. It has been found that the content of CO and NOx in the flue gases grows with an increase in the basicity and molecular weight of nitrogen compounds in the following order: pyridine < n-butylamine < pyrrole < quinoline < indole. The effect of a Pt-based CO afterburning promoter on the regeneration gas composition has been studied. The introduction of this additive provides a decrease in the CO concentration in the regeneration gases by 99.4%; however, it leads to an increase in the NOx concentration by 72.1%. Additives for decreasing the nitrogen oxide content in cracking catalyst regeneration gases have been synthesized and studied. These additives are represented by МеОх (Me = Cu, Fe, Ce, Co, Mn, La) oxide systems supported on γ-alumina. The introduction of the studied additives into the catalyst system at the regeneration stage provides a decrease in the content of nitrogen oxides formed during regeneration. For the additive based on copper oxide, the efficiency in decreasing the nitrogen oxide content in regeneration gases is up to 12.2%.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"17 4","pages":"299 - 308"},"PeriodicalIF":1.3,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147342240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Catalytic Etching of Industrial Pt–Pd–Rh–Ru Gauzes During High-Temperature Oxidation of Ammonia with Air 高温氨氧化过程中工业Pt-Pd-Rh-Ru纱布的催化蚀刻

IF 1.3

Catalysis in Industry Pub Date : 2026-02-27 DOI: 10.1134/S2070050425700321

A. N. Salanov, A. N. Serkova, A. V. Kalinkin, M. Yu. Smirnov, L. A. Isupova, V. N. Parmon

{"title":"Catalytic Etching of Industrial Pt–Pd–Rh–Ru Gauzes During High-Temperature Oxidation of Ammonia with Air","authors":"A. N. Salanov, A. N. Serkova, A. V. Kalinkin, M. Yu. Smirnov, L. A. Isupova, V. N. Parmon","doi":"10.1134/S2070050425700321","DOIUrl":"10.1134/S2070050425700321","url":null,"abstract":"High-temperature oxidation of ammonia on Pt alloy gauzes to NO oxide is used for the industrial production of nitric acid. The world annual production of HNO3 reaches 70–80 million tons. About 80% of the produced acid is used to manufacture mineral fertilizers utilized in agriculture. In the process of oxidation of NH3 on Pt alloy gauzes, etched layers are formed, which reduce the activity and strength of the gauzes and increase catalyst losses. To improve the efficiency of catalysts used in the industrial oxidation of NH3, etched structures on the surface of catalysts are being actively studied. This paper presents the results of a study of the morphology, microstructure, and chemical composition of etched structures on industrial Pt–Pd–Rh–Ru gauzes with a composition of 81, 15, 3.5, and 0.5 wt %, used in the oxidation of NH3 with air at T = 1133 K and a pressure of 3.6 bar in industrial and laboratory reactors. The used gauzes were found to contain a etched layer, including porous crystalline agglomerates with dimensions of 10–50 µm and other crystalline structures. The etched layers are characterized by an increased specific surface area and a stable crystalline structure and phase composition, as well as an increased concentration of absorbed atoms Oab and Nab (20–25 at %) in the near-surface layers of the catalyst. Due to the formation of catalyst areas with different temperatures, the mass transfer of metals from “hot” to “cold” areas occurs both during the surface diffusion of metal atoms and the evaporation and condensation of volatile oxides such as PtO2 and others. As a result of these processes, deep etching of the catalyst occurs with the formation of a rough layer of large crystalline agglomerates.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"17 4","pages":"345 - 361"},"PeriodicalIF":1.3,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147342334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Supported Nickel-Containing Catalysts for Methane Tri-reforming: Effect of Pretreatment Conditions 甲烷三重整负载型含镍催化剂的研制：预处理条件的影响

IF 1.3

Catalysis in Industry Pub Date : 2026-02-27 DOI: 10.1134/S2070050425700278

E. V. Matus, E. N. Kovalenko, O. B. Sukhova, I. Z. Ismagilov, A. A. Pochtar’, A. V. Kapishnikov, O. A. Stonkus, S. A. Yashnik, M. A. Kerzhentsev, S. R. Khairulin

{"title":"Development of Supported Nickel-Containing Catalysts for Methane Tri-reforming: Effect of Pretreatment Conditions","authors":"E. V. Matus, E. N. Kovalenko, O. B. Sukhova, I. Z. Ismagilov, A. A. Pochtar’, A. V. Kapishnikov, O. A. Stonkus, S. A. Yashnik, M. A. Kerzhentsev, S. R. Khairulin","doi":"10.1134/S2070050425700278","DOIUrl":"10.1134/S2070050425700278","url":null,"abstract":"To improve the efficiency of methane tri-reforming catalysts, the effect of pretreatment conditions of a Ce0.2Ni0.8O1.2/Al2O3 catalyst on the physicochemical and functional properties of the catalyst has been studied. Using a set of methods (thermal analysis, low-temperature nitrogen adsorption, X-ray diffraction analysis, electron microscopy, temperature-programmed reduction with hydrogen), it has been revealed that varying the composition of the gaseous medium used during pretreatment at 800°C (oxidizing, inert, reducing medium) it is possible to control the textural, structural, and redox characteristics of the catalyst and, as a consequence, the functional properties of it. It has been shown that the specific surface area and degree of dispersion of the active component increase in the following order of compositions of the gaseous medium used for catalyst pretreatment: oxidizing → inert → reducing; the resistance of the sample to reoxidation and coking decreases in the same order. It has been found that the highest and most stable parameters of the methane tri-reforming process (H2 yield of 86% at a CH4 conversion of 95%) are provided by the catalyst after pretreatment in an inert medium due to the implementation of the metal–support interaction at an optimum level and an increase in the concentration of sites involved in the activation of CO2.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"17 4","pages":"386 - 399"},"PeriodicalIF":1.3,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147342456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of the Reaction Mixture Composition on the Catalytic Properties of MoVSbNbСeOx/SiO2 Catalysts in the Oxidative Dehydrogenation of Ethane to Ethylene 反应混合物组成对MoVSbNbСeOx/SiO2催化剂乙烷氧化脱氢制乙烯催化性能的影响

IF 1.3

Catalysis in Industry Pub Date : 2026-02-27 DOI: 10.1134/S2070050425700394

G. A. Zenkovets, V. M. Bondareva, V. I. Sobolev, A. A. Shutilov

引用次数: 0

Synthesis and Properties of Palladium Catalysts Supported on N-Modified Carbon Material Sibunit in the Reaction of Selective Acetylene Hydrogenation 选择性乙炔加氢反应中n改性碳材料Sibunit负载钯催化剂的合成及性能研究

IF 1.3

Catalysis in Industry Pub Date : 2026-02-27 DOI: 10.1134/S2070050425700217

D. V. Yurpalova, E. O. Akhralovich, M. A. Panafidin, A. V. Nartova, A. M. Dmitrachkov, O. V. Gorbunova, A. V. Syrieva, V. L. Temerev

引用次数: 0

Composites Based on Cellulose and Metal-Organic Frameworks for Removing Dye from Wastewater 纤维素-金属-有机骨架复合材料对废水中染料的去除