Catalysis in Industry最新文献_第6页

Structural and Catalytic Properties of Binary Alumina‒Amorphous Aluminosilicate Systems 二元氧化铝-非晶铝硅酸盐体系的结构与催化性能

IF 0.7

Catalysis in Industry Pub Date : 2023-09-04 DOI: 10.1134/S2070050423030030

V. P. Doronin, T. V. Bobkova, T. P. Sorokina, O. V. Potapenko, A. S. Yurtaeva, N. N. Leont’eva, T. I. Gulyaeva

{"title":"Structural and Catalytic Properties of Binary Alumina‒Amorphous Aluminosilicate Systems","authors":"V. P. Doronin, T. V. Bobkova, T. P. Sorokina, O. V. Potapenko, A. S. Yurtaeva, N. N. Leont’eva, T. I. Gulyaeva","doi":"10.1134/S2070050423030030","DOIUrl":"10.1134/S2070050423030030","url":null,"abstract":"Amorphous aluminosilicate‒alumina systems are investigated by a set of physicochemical means that includes studying the NMR 27Al spectra of solid samples and the acidity of catalysts via ammonia temperature-programmed desorption, a structural X-ray diffraction study, and a thermogravimetric analysis of samples. Studying the catalytic properties of samples under the conditions of cracking on a model feedstock of n-dodecane in a mixture with 2-methylthiophene shows that the conversion of feedstock grows in the order 100% Al2O3 (AHO) > 70% Al‒Si + 30% Al2O3 (AHO) > 30% Al‒Si + 70% Al2O3 (AHO) > 100% Al‒Si (where AHO is the aluminum hydroxide of sulfate synthesis, and Al‒Si is an amorphous aluminosilicate). Raising the calcination temperature of samples from 500 to 700°C reduces the conversion of feedstock. Increasing the contribution from hydrogen transfer reactions leads to an increase improves the selectivity toward hydrogen sulfide and lowers the content of sulfur compounds in the liquid products.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"15 3","pages":"229 - 237"},"PeriodicalIF":0.7,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4191290","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

Chromatography in Catalysis 催化色谱

IF 0.7

Catalysis in Industry Pub Date : 2023-09-04 DOI: 10.1134/S2070050423030108

L. N. Stepanova, A. V. Lavrenov

引用次数: 0

Deactivation and Regeneration of a Zeolite-Containing Cobalt Catalyst in a Fisher–Tropsch Synthesis Reactor 含钴沸石催化剂在费托合成反应器中的失活与再生

IF 0.7

Catalysis in Industry Pub Date : 2023-06-17 DOI: 10.1134/S207005042302006X

A. S. Gorshkov, L. V. Sineva, K. O. Gryaznov, E. Yu. Asalieva, V. Z. Mordkovich

引用次数: 1

Study of Iron-Based Catalysts Performance in Fischer–Tropsch Synthesis: Temperature and Promoter Effect 费托合成中铁基催化剂性能的研究:温度和促进剂效应

IF 0.7

Catalysis in Industry Pub Date : 2023-06-17 DOI: 10.1134/S2070050423020071

Mahin Jabalameli, Yahya Zamani, Sahar Baniyaghoob, Laleh Shirazi

{"title":"Study of Iron-Based Catalysts Performance in Fischer–Tropsch Synthesis: Temperature and Promoter Effect","authors":"Mahin Jabalameli, Yahya Zamani, Sahar Baniyaghoob, Laleh Shirazi","doi":"10.1134/S2070050423020071","DOIUrl":"10.1134/S2070050423020071","url":null,"abstract":"The iron-based catalysts were prepared via wet-impregnation method. The composition of the final iron catalysts, regarding to the weight ratio is as follow 14%Fe/γ-Al2O3, 14%Fe/3%Cu/γ-Al2O3, 14%Fe/3%Sn/γ-Al2O3 and 14%Fe/3%Cu/1%Sn/γ-Al2O3. The catalysts were characterized using XRD, ICP, BET, H2-TPR, FE-SEM and EDX techniques. The catalytic activity was evaluated in a fixed bed reactor under 2.0 MPa of pressure, H2 : CO = 1 : 1, GHSV = 2 L h–1 ({text{g}}_{{{text{cat}}}}^{{-1}}), in the temperature range of 270–300°C. Then, the effect of temperature and promoters (Cu and Sn) on the catalyst performance was investigated. CO conversion and product selectivity were also calculated using the results of GC. The results showed that the Cu and Sn promoters increased the reduction rate of Fe2O3 by providing H2 dissociation sites. Higher temperatures were also shown to change the CO conversion and product selectivity. The selectivity of both methane and C2–C4 hydrocarbons decreased while the selectivity of C5+ increased because of simultaneous use of Cu and Sn for promoting iron catalyst. Sn promoter increased FT and WGS activities.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"15 2","pages":"132 - 143"},"PeriodicalIF":0.7,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4687169","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 Iron Oxide Content in Bentonite Clay Incorporated into a Catalytic System on the Sulfur Distribution in the Products of Cracking from Model Sulfur-Containing Feedstock 膨润土催化体系中氧化铁含量对模型含硫原料裂化产物中硫分布的影响

IF 0.7

Catalysis in Industry Pub Date : 2023-06-17 DOI: 10.1134/S2070050423020022

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

引用次数: 0

Mathematical Modeling of Vacuum Gasoil Hydrotreatment 真空汽油加氢处理的数学建模

IF 0.7

Catalysis in Industry Pub Date : 2023-06-17 DOI: 10.1134/S2070050423020113

A. M. Vorob’ev, N. S. Belinskaya, D. A. Afanas’eva, S. B. Arkenova, T. A. Kaliyev, E. B. Krivtsov, E. N. Ivashkina, N. I. Krivtsova

引用次数: 0

Effect of the Precursor and Synthesis Regime on the Properties of Hematite for Preparing 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

IF 0.7

Catalysis in Industry Pub Date : 2023-06-17 DOI: 10.1134/S2070050423020046

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

{"title":"Effect of the Precursor and Synthesis Regime on the Properties of Hematite for Preparing Promoted Iron Oxide Catalysts","authors":"A. N. Dvoretskaya, L. G. Anikanova, N. V. Dvoretskii","doi":"10.1134/S2070050423020046","DOIUrl":"10.1134/S2070050423020046","url":null,"abstract":"The fine crystal structure of hematite samples used for preparing potassium promoted iron oxide catalysts of dehydrogenation is studied via X-ray diffraction and scanning electron microscopy. α-Fe2O3 samples are synthesized under non-equilibrium conditions from several precursors in different regimes of thermolysis. The most important characteristic of hematite that causes the activity and selectivity of a hematite-based catalyst is its fine crystal structure (FCS). The fine crystal structure of hematite predetermines the phase composition of the catalyst. The fine crystal structure of hematite forms during its synthesis and is determined by the nature of the precursor, the temperature of synthesis, the temperature gradient, and the rate of the removal of gaseous thermolysis products. The highest activity is displayed by the catalyst prepared on the basis of hematite with mosaic blocks 70–90 nm in size and a minimum SF concentration caused by half and quaternary dislocations. Such hematite was synthesized via the thermolysis of iron sulfate at 950 K under fluidized bed and low temperature gradient conditions. Hematite from iron carbonate is not recommended for use in synthesizing a catalyst due to the high concentration of low-temperature SFs, which result in the formation of catalytically low-active potassium β-polyferrite.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"15 2","pages":"144 - 151"},"PeriodicalIF":0.7,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4687199","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

Phenol and Tetralin Co-Conversion Regularities under Catalytic Cracking Conditions 催化裂化条件下苯酚与四氢萘共转化规律

IF 0.7

Catalysis in Industry Pub Date : 2023-06-17 DOI: 10.1134/S2070050423020095

P. V. Lipin, V. P. Doronin, O. V. Potapenko, T. P. Sorokina

{"title":"Phenol and Tetralin Co-Conversion Regularities under Catalytic Cracking Conditions","authors":"P. V. Lipin, V. P. Doronin, O. V. Potapenko, T. P. Sorokina","doi":"10.1134/S2070050423020095","DOIUrl":"10.1134/S2070050423020095","url":null,"abstract":"The effect of an oxygen-containing compound on the cracking of an aromatic hydrocarbon is studied using the example of a model phenol–tetralin mixture. An analysis of the temperature dependences of the cracking rate constant of tetralin and tetralin in a mixture with phenol indicates that tetralin cracking is ihhibited during its co-conversion with an oxygen-containing compound due to the greater adsorption capacity of phenol on the catalyst’s surface. It is found that phenol in the model mixture changes the composition of liquid products, especially at low cracking temperatures. The effect of water on the conversion of a phenol-tetralin mixture is studied. It is established that water in the model feedstock reduces the inhibition of the cracking reaction of an aromatic hydrocarbon by an oxygen-containing compound. Based on the results of catalytic reactions, it is determined that when water is added, the level of the overall conversion of the mixture and the conversion of tetralin increase regardless of temperature. No appreciable qualitative differences between the distributions of cracking products in model mixtures with and without water have been revealed.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"15 2","pages":"203 - 211"},"PeriodicalIF":0.7,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4690085","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

Experience in the Development and Introduction of Aluminochromic for Fluidized-Bed Isobutane Dehydrogenation 异丁烷流化床脱氢用变色铝的研制与引进经验

IF 0.7

Catalysis in Industry Pub Date : 2023-06-17 DOI: 10.1134/S2070050423020058

S. R. Egorova, A. A. Lamberov

{"title":"Experience in the Development and Introduction of Aluminochromic for Fluidized-Bed Isobutane Dehydrogenation","authors":"S. R. Egorova, A. A. Lamberov","doi":"10.1134/S2070050423020058","DOIUrl":"10.1134/S2070050423020058","url":null,"abstract":"A summary of experience in the development of a microspherical aluminum–chromium catalyst isobutane dehydrogenation to isobutylene using the Yarsintez technology is presented. The development dynamics of KDI industrial catalysts based on a new boehmite support is considered. The relationships between elemental and phase compositions of catalysts and their operational characteristics are found. A boehmite support was obtained according to a new two-stage scheme, including the hydrothermal treatment of a thermal decomposition product of gibbsite agglomerates with a required size. This technology makes it possible to control the phase composition of a support and the physicomechanical properties of catalysts and their catalytic properties, which made it possible to obtain KDI, KDI-M, and KDI-M1 catalysts. The most important stages of their introduction into commercial operation at Nizhnekamskneftekhim are described. The KDI-M industrial catalyst provides a stable yield of isobutylene of 33–37% during the isobutane dehydrogenation and a yield of methylbutenes of 30% during the isopentane dehydrogenation. The catalyst consumption is 2−3 kg per ton of isobutylene produced. The ways are proposed for the improvement of a catalyst and the optimization of reactor equipment on the basis of monitoring the catalyst operation results. The KDI-M1 industrial catalyst modified with a silicon-containing inorganic complex is better than earlier products of this series in its activity and selectivity according to laboratory tests and is ready for production.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"15 2","pages":"212 - 219"},"PeriodicalIF":0.7,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4688486","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 Metal-Containing Anions on the Catalytic Properties of Imidazolium Derivatives Immobilized on Silochrome in Oxidative Desulfurization 含金属阴离子对硅铬固载咪唑衍生物氧化脱硫性能的影响

IF 0.7

Catalysis in Industry Pub Date : 2023-06-17 DOI: 10.1134/S2070050423020101

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

{"title":"Effect of Metal-Containing Anions on the Catalytic Properties of Imidazolium Derivatives Immobilized on Silochrome in Oxidative Desulfurization","authors":"I. G. Tarkhanova, A. G. Ali-Zade, A. K. Buryak, V. M. Zelikman","doi":"10.1134/S2070050423020101","DOIUrl":"10.1134/S2070050423020101","url":null,"abstract":"A comparative analysis is performed for the properties of two Fenton-type catalysts in the oxidation of sulfur-containing compounds with hydrogen peroxide and the desulfurization of crude oil. The catalysts are based on Cu(I) and Fe(III), and Mo(VI) and W(VI) polyoxometalates. Heterogeneous samples are imidazolium salts chemically immobilized on surfaces of silochrome and contain the iron and copper chloride complexes or phosphomolybdic and phosphotungstic acid anions. Thiophene (T), dibenzothiophene (DBT), methylphenyl sulfide (MPS), and a diesel fraction with an initial amount of sulfur of 1080 ppm are used as model substrates. It is found that the order of reactivity of thiophene substrates depends on the nature of metal-containing anions: thiophene > DBT on the Cu and Fe catalysts and DBT > thiophene on the polyoxometalate catalysts. This effect is explained using literature data. The catalyst based on phosphotungstic acid allows desulfurization of the diesel fraction of oil to amounts of sulfur of < 10 ppm, which meets today’s environmental standards.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"15 2","pages":"125 - 131"},"PeriodicalIF":0.7,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4979211","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