Kataliz v promyshlennosti最新文献_第7页

Mathematical Modeling of the Vacuum Gas Oil Hydrotreatment 真空气油加氢处理的数学建模

Kataliz v promyshlennosti Pub Date : 2022-09-29 DOI: 10.18412/1816-0387-2022-5-40-52

A. M. Vorob’ev, N. Belinskaya, D. Afanasieva, S. Arkenova, T. Kaliev, E. Krivtsov, E. Ivashkina, N. Krivtsova

引用次数: 0

Experience in the Development and Implementation of Chromium-Alumina Catalysts of the KDI Series for Isobutane Dehydrogenation in a Fluidized Bed KDI系列异丁烷流化床脱氢铬-氧化铝催化剂的研制与应用经验

Kataliz v promyshlennosti Pub Date : 2022-09-29 DOI: 10.18412/1816-0387-2022-5-61-69

S. Egorova, A. Lamberov

{"title":"Experience in the Development and Implementation of Chromium-Alumina Catalysts of the KDI Series for Isobutane Dehydrogenation in a Fluidized Bed","authors":"S. Egorova, A. Lamberov","doi":"10.18412/1816-0387-2022-5-61-69","DOIUrl":"https://doi.org/10.18412/1816-0387-2022-5-61-69","url":null,"abstract":"The paper summarizes the experience in the development of a microspherical chromium-alumina catalyst for isobutane dehydrogenation to isobutylene according to the technology devised at Yarsintez. The development of commercial catalysts of the KDI series based on a new boehmite support was considered. Interrelations of elemental and phase composition of the catalysts with their performance were established. A new two-step scheme for producing the boehmite support by hydrothermal treatment of the thermal decomposition product of gibbsite agglomerates with a desired size makes it possible to control its phase composition as well as the physico-mechanical characteristics of the catalysts and their catalytic properties, which allowed obtaining a series of KDI, KDI-M, and KDI-M1 catalysts. The most important steps in commercial implementation of the catalyst at PJSC Nizhnekamskneftekhim were noted. The commercial KDI-M catalyst provided a stable 33–37 % yield of isobutylene in isobutane dehydrogenation and a 30 % yield of methylbutenes in isopentane dehydrogenation. The catalyst consumption was 2–3 kg per ton of the produced isobutylene. The catalyst operation was monitored to propose a way for its improvement and optimization of the reactor instrumentation. According to the laboratory testing, a commercial sample of the KDI-M1 catalyst modified with a silicon-containing inorganic complex compound has higher activity and selectivity than previous catalysts of this series and is ready to industrial implementation.","PeriodicalId":17783,"journal":{"name":"Kataliz v promyshlennosti","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80953125","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

A Single-Step Hydrolysis-Reduction of Potato Starch to Sorbite in the Presence of Bifunctional Catalyst Ru/Сs3HSiW12O40 双功能催化剂Ru/Сs3HSiW12O40下马铃薯淀粉一步水解还原制索氏体

Kataliz v promyshlennosti Pub Date : 2022-09-29 DOI: 10.18412/1816-0387-2022-5-70-82

N. Gromov, T. Medvedeva, V. N. Panchenko, O. Taran, M. Timofeeva, V. Parmon

引用次数: 0

Effect of the Precursor and Synthesis Mode on the Properties of Hematite for the Preparation of Promoted Iron Oxide Catalysts 前驱体及合成方式对制备促进氧化铁催化剂赤铁矿性能的影响

Kataliz v promyshlennosti Pub Date : 2022-09-27 DOI: 10.18412/1816-0387-2022-5-6-14

A. Dvoretskaya, L. G. Anikanova, N. V. Dvoretskii

{"title":"Effect of the Precursor and Synthesis Mode on the Properties of Hematite for the Preparation of Promoted Iron Oxide Catalysts","authors":"A. Dvoretskaya, L. G. Anikanova, N. V. Dvoretskii","doi":"10.18412/1816-0387-2022-5-6-14","DOIUrl":"https://doi.org/10.18412/1816-0387-2022-5-6-14","url":null,"abstract":"The fine crystal structure of hematite samples used to prepare potassium-promoted iron oxide dehydrogenation catalysts has been studied by X-ray diffraction and scanning electron microscopy. Samples of α-Fe2O3 were obtained under nonequilibrium conditions from several precursors under different thermolysis regimes. The most important characteristic of hematite, which determines the activity and selectivity of the catalyst based on it, is the fine crystal structure (TCS). The TCS of hematite determines the phase composition of the catalyst. The TCS of hematite is formed during the synthesis of hematite and is determined by the nature of the precursor, the temperature of sample synthesis, and the temperature gradient of the rate of removal of gaseous thermolysis products. The highest activity was demonstrated by a catalyst prepared on the basis of hematite with mosaic blocks of 70–90 nm, with a minimum concentration of SF due to half and quaternary dislocations. Such hematite was obtained by thermolysis of iron sulfate at 950 K under fluidized bed conditions and a low temperature gradient. Hematite from iron carbonate is not recommended for the synthesis of a catalyst due to the high concentration of low-temperature SF, which leads to the formation of catalytically inactive potassium β-polyferrite.","PeriodicalId":17783,"journal":{"name":"Kataliz v promyshlennosti","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90148985","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

The effect of iron oxide content in bentonite clay in the catalytic composition on the distribution of sulfur in the cracking products of the model sulfur-containing feedstock 研究了催化组份中膨润土中氧化铁含量对模型含硫原料裂解产物中硫分布的影响

Kataliz v promyshlennosti Pub Date : 2022-07-21 DOI: 10.18412/1816-0387-2022-4-58-65

T. V. Bobkova, K. I. Dmitriev, O. Potapenko, V. Doronin, T. P. Sorokina

引用次数: 0

Investigation of the hydroisomerization of diesel fractions with different concentration of nitrogen-containing compounds on bifunctional catalysts based on ZSM-23 and non-noble metals ZSM-23和非贵金属双功能催化剂对不同含氮化合物浓度柴油馏分加氢异构反应的研究

Kataliz v promyshlennosti Pub Date : 2022-07-21 DOI: 10.18412/1816-0387-2022-4-66-74

T. Bogomolova, M. Smirnova, O. Klimov, A. Noskov

引用次数: 1

A comparative characterization of the properties of biocatalysts containing chemotrypsin immobilized on polysaccharide supports 在多糖载体上固定化胰蛋白酶生物催化剂性能的比较研究

Kataliz v promyshlennosti Pub Date : 2022-07-21 DOI: 10.18412/1816-0387-2022-4-75-81

A. Krasnoshtanova, A. D. Besyaeva

引用次数: 0

The formation of a heterogeneous-homogeneous catalytic system for the benzene alkylation with ethylene upon interaction of aluminum and carbon tetrachloride alloys 铝和四氯化碳合金相互作用下苯与乙烯烷基化反应的多相-均相催化体系的形成

Kataliz v promyshlennosti Pub Date : 2022-07-20 DOI: 10.18412/1816-0387-2022-4-36-42

A. Arbuzov, V. Drozdov, A. V. Lavrenov, N. N. Leontieva

{"title":"The formation of a heterogeneous-homogeneous catalytic system for the benzene alkylation with ethylene upon interaction of aluminum and carbon tetrachloride alloys","authors":"A. Arbuzov, V. Drozdov, A. V. Lavrenov, N. N. Leontieva","doi":"10.18412/1816-0387-2022-4-36-42","DOIUrl":"https://doi.org/10.18412/1816-0387-2022-4-36-42","url":null,"abstract":"The in situ formation of the catalytic heterogeneous-homogeneous system including the Al-M (M = Ni, Co, Cu) alloy and the Al(M)/Cl complex in a benzene-ethylene medium at a temperature of 80 °C and pressure 0.2–0.3 MPa was studied. Regularities were found in the interaction of Al-M alloys activated by the liquid-metal Ga-In eutectic with a chlorinating agent (CCl4), which led to the formation of catalytically active Al(M)/Cl metal-aluminum chloride complexes. Spectrokinetic measurements showed that reactivity of the activated alloys toward an excess of CCl4 can form the following series: Al-Cu ≈ Al-Ni > Al > Al-Co. The highest catalytic activity was observed for the nickel-aluminum chloride complexes; their selectivity to ethyl benzene was up to 48 %. According to IR and UV-vis spectroscopy data, the structure and composition of the metal-chloride complexes formed in situ in the aromatic reaction medium are determined by a combination of the coupled ion pairs [AlCl4]–tetrahed./[NiCl6]4–octahed. and [AlCl4]–tetrahed./[CuCl2]–lin. stabilized by the (C6H5)3C+ carbocation.","PeriodicalId":17783,"journal":{"name":"Kataliz v promyshlennosti","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82231888","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 conversion of flame gas on Rh catalysts with subsequent direct monetization Rh催化剂上火焰气体的催化转化及其后续的直接货币化

Kataliz v promyshlennosti Pub Date : 2022-07-20 DOI: 10.18412/1816-0387-2022-4-51-57

A. Urlukov, S. I. Uskov, D. Potemkin, P. Snytnikov

引用次数: 1

The effect of the nature of metal-containing anions on the catalytic properties of imidazolium derivatives immobilized on silochrom in oxidative desulfurization 含金属阴离子性质对硅铬固载咪唑衍生物氧化脱硫催化性能的影响

Kataliz v promyshlennosti Pub Date : 2022-07-20 DOI: 10.18412/1816-0387-2022-4-43-50

I. Tarkhanova, A. G. Ali-Zade, A. K. Buryak, V. M. Zelikman

{"title":"The effect of the nature of metal-containing anions on the catalytic properties of imidazolium derivatives immobilized on silochrom in oxidative desulfurization","authors":"I. Tarkhanova, A. G. Ali-Zade, A. K. Buryak, V. M. Zelikman","doi":"10.18412/1816-0387-2022-4-43-50","DOIUrl":"https://doi.org/10.18412/1816-0387-2022-4-43-50","url":null,"abstract":"Two types of catalysts – Fenton catalysts based on Cu(I) and Fe(III), and polyoxometalates Mo(VI) and W(VI) – were compared in the oxidation of sulfur-containing compounds by hydrogen peroxide and desulfurization of oil stock. Heterogeneous samples were represented by imidazolium salts chemically anchored on the silochrom surface and containing chloride complexes of iron and copper or anions of phosphomolybdic and tungstophosphoric acids. Thiophene (T), dibenzothiophene (DBT) and methyl phenyl sulfide (MPS) as well as the diesel fraction with the initial sulfur content of 1080 ppm were used as the model substrates. The reactivity of thiophene substrates was found to depend on the nature of metal-containing anions: on Cu and Fe catalysts, thiophene > DBT, while on polyoxometalate catalysts, DBT > thiophene. This effect was interpreted using literature data. The catalyst based on tungstophosphoric acid provided desulfurization of the diesel fraction of oil to the sulfur content < 10 ppm, which corresponds to modern environmental standards.","PeriodicalId":17783,"journal":{"name":"Kataliz v promyshlennosti","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72769203","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: 1