Catalysis in Industry最新文献

Studying of the Effect of Gas Recycle Ratio on the Formation of C5–C18 Alkenes in the Fischer–Tropsch Synthesis

IF 0.7

Catalysis in Industry Pub Date : 2025-01-27 DOI: 10.1134/S2070050424700284

I. N. Zubkov, O. D. Denisov, M. A. Timokhina, A. P. Savostyanov, R. E. Yakovenko

{"title":"Studying of the Effect of Gas Recycle Ratio on the Formation of C5–C18 Alkenes in the Fischer–Tropsch Synthesis","authors":"I. N. Zubkov, O. D. Denisov, M. A. Timokhina, A. P. Savostyanov, R. E. Yakovenko","doi":"10.1134/S2070050424700284","DOIUrl":"10.1134/S2070050424700284","url":null,"abstract":"The synthesis of C5–C18 alkenes in the presence of a zeolite-containing Co–Al2O3/SiO2/ZSM-5/Al2O3 catalyst in flow and recycle flow operation modes at a temperature of 250°C, a pressure of 2.0 MPa, a gas hourly space velocity (GHSV) of 1000 h−1, an H2/CO ratio of 1.70 in the feed gas, and recycle ratios of 4, 8, and 16 has been studied. It has been found that the process parameters (selectivity and productivity with respect to C5+ hydrocarbons) pass through a maximum at a recycle ratio of 8. The use of gas recycling, unlike the flow synthesis mode, makes it possible to control the product composition. An increase in the recycle ratio in a range of 4–16 leads to an increase in the content of synthesized C5–C20 alkenes from 53.9 to 65.7 wt %. The use of a zeolite-containing catalyst, compared with a Co–Al2O3/SiO2 catalyst, intensifies the formation of C8–C12 alkenes by 3.3 times: their content increases from 13.5 to 44.2 wt % at identical recycle ratios, pressures, and an H2/CO ratio of 1.70 in the feed gas. It has been found that with an increase in the recycle ratio, the deactivation rate of the zeolite-containing catalyst decreases; this fact can be attributed to a decrease in the partial pressure of water in the reaction volume.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"16 4","pages":"443 - 450"},"PeriodicalIF":0.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109298","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

Commercial Aluminum Hydroxides. Part 1: Phase Composition and Textural Characteristics of Commercial Aluminum Hydroxides/Oxides

IF 0.7

Catalysis in Industry Pub Date : 2025-01-27 DOI: 10.1134/S207005042470020X

A. P. Bebyakina, M. I. Farid, A. V. Boretskaya, S. R. Egorova, A. A. Lamberov

{"title":"Commercial Aluminum Hydroxides. Part 1: Phase Composition and Textural Characteristics of Commercial Aluminum Hydroxides/Oxides","authors":"A. P. Bebyakina, M. I. Farid, A. V. Boretskaya, S. R. Egorova, A. A. Lamberov","doi":"10.1134/S207005042470020X","DOIUrl":"10.1134/S207005042470020X","url":null,"abstract":"Aluminum oxides are the most common component used in the design of heterogeneous catalysts of oil refining and petrochemistry. The optimum characteristics of aluminum oxide supports and catalysts (e.g., specific surface area, pore size, and phase and impurity compositions) correspond to the type of hydrocarbon feedstocks and technological process. In light of the trend toward import substitution, it is becoming ever more relevant to study the market for domestic producers of aluminum hydroxide feedstocks used in the synthesis of aluminum oxides. In this work, domestic commercial samples of aluminum hydroxides are investigated via X-ray diffraction, simultaneous thermogravimetry/differential scanning calorimetry, low-temperature nitrogen adsorption, and elemental analysis. It is established that the objects of study are most often inhomogeneous in phase and contain iron, silicon, and calcium impurities. The effect of degree of crystallinity and the sizes of coherent scattering regions in aluminum hydroxides with a predominantly boehmite structure (and in some cases, aluminum hydroxides containing bayerite) on the textural characteristics of synthesized aluminum oxides is demonstrated.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"16 4","pages":"363 - 371"},"PeriodicalIF":0.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109300","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

Dehydrogenation of n-Butane to Butadiene-1,3 on an Alumina-Chromium Catalyst. Part 1: Kinetics of Dehydrogenation and Reactions of Coke Formation

IF 0.7

Catalysis in Industry Pub Date : 2025-01-27 DOI: 10.1134/S2070050424700259

E. V. Ovchinnikova, R. V. Petrov, V. A. Chumachenko, A. S. Noskov

{"title":"Dehydrogenation of n-Butane to Butadiene-1,3 on an Alumina-Chromium Catalyst. Part 1: Kinetics of Dehydrogenation and Reactions of Coke Formation","authors":"E. V. Ovchinnikova, R. V. Petrov, V. A. Chumachenko, A. S. Noskov","doi":"10.1134/S2070050424700259","DOIUrl":"10.1134/S2070050424700259","url":null,"abstract":"The kinetics of n-butane dehydrogenation to butadiene is studied with temperature (T) variation of 550–625°C, duration of dehydrogenation stage (t) of 5–30 min, and space velocity (V) of 4400–35 200 h−1 on industrial catalyst K-CrOx/γ-Al2O3 at a fraction of 56–94 μm. The catalyst is stabilized before studies. The granulated catalyst in a reduction–dehydrogenation–regeneration cycle at 593°C, and then as a fraction of 56–94 μm in dehydrogenation–regeneration cycle at 650°C. The maximum selectivity toward butadiene of ~25 mol % is achieved with n-butane conversion of 26–30% (V = 35 200 h−1), T = 600 °C, and t = 5 min, while the maximum yield of butadiene ~10 mol % is obtained with an increase in conversion up to ~50% (V = 8800 h–1) under the same conditions. Raising T to 625°C and t to 30 min and lowering V to ~4400 h–1 increases the selectivity toward by-products to ~50 mol %. It is found that the energy of activation for the rates of product formation falls in the order by-products > butylene > butadiene. A kinetic model is proposed that describes the formation of butadiene via butylene, the formation of ethane/ethylene and methane/propylene by-products during butylene hydrocracking, and secondary conversions of by-products, plus the formation of coke and its effect on catalyst activity. In the model, the inhibition of dehydrogenation reactions by components of reaction mixture is described by a mechanism in which the limiting stage is a surface reaction on two active centers. The adequacy of the kinetic model is confirmed by good agreement between the calculated and experimental results.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"16 4","pages":"413 - 423"},"PeriodicalIF":0.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109418","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

Variation in the Shape of Catalyst Modules during the Autothermal Reforming of Hexadecane, Propane, and Methane by the Mathematical Modeling Method

IF 0.7

Catalysis in Industry Pub Date : 2025-01-27 DOI: 10.1134/S2070050424700302

S. V. Zazhigalov, V. A. Shilov, A. N. Zagoruiko, P. V. Snytnikov

引用次数: 0

Dehydrogenation of n-Butane to Butadiene-1,3 on Aluminochromium Catalyst. Part 2: Formulating a Mathematical Model of the Reactor

IF 0.7

Catalysis in Industry Pub Date : 2025-01-27 DOI: 10.1134/S2070050424700260

E. S. Borisova, V. M. Khanaev, V. A. Chumachenko, E. V. Ovchinnikova, A. S. Noskov

{"title":"Dehydrogenation of n-Butane to Butadiene-1,3 on Aluminochromium Catalyst. Part 2: Formulating a Mathematical Model of the Reactor","authors":"E. S. Borisova, V. M. Khanaev, V. A. Chumachenko, E. V. Ovchinnikova, A. S. Noskov","doi":"10.1134/S2070050424700260","DOIUrl":"10.1134/S2070050424700260","url":null,"abstract":"The authors formulate a mathematical model of the non-stationary single-stage dehydrogenation of n-butane to butadiene in an adiabatic fixed-bed reactor for the first time, based on a kinetic model that describes the formation of coke and primary and secondary by-products on a K-CrOx/γ-Al2O3 catalyst. The model allows prediction of the yield of butadiene and other products depending on the activity of the catalyst, the composition of initial mixture, the period of the dehydrogenation cycle, and the degree of catalyst dilution with an inert material (including the non-uniform dilution of a catalyst with an inert material along the bed length). It also allows assessment of the temperature regime of the catalyst’s operation and the degree of its coking along the bed. It is shown that the model is adequate for describing the conversion of n-butane, the formation of butadiene and butylene, the accumulation of coke, and the loss of catalyst activity using test calculations of main technological parameters as an example.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"16 4","pages":"424 - 432"},"PeriodicalIF":0.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109291","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 Reduction of Carbon Dioxide on Commercial Catalysts

IF 0.7

Catalysis in Industry Pub Date : 2025-01-27 DOI: 10.1134/S2070050424700235

A. N. Saliev, V. B. Il’in, M. A. Timokhina, A. V. Dul’nev, A. P. Savost’yanov, R. E. Yakovenko

{"title":"Catalytic Reduction of Carbon Dioxide on Commercial Catalysts","authors":"A. N. Saliev, V. B. Il’in, M. A. Timokhina, A. V. Dul’nev, A. P. Savost’yanov, R. E. Yakovenko","doi":"10.1134/S2070050424700235","DOIUrl":"10.1134/S2070050424700235","url":null,"abstract":"The applicability of some commercial catalysts in the conversion of carbon dioxide into syngas is estimated. Catalysts based on Cu and transitional metals (Fe, Ni, Co) and used in large-capacity hydrogenation and syngas technology are selected for study. They include NIAP-03-01 (steam conversion of hydrocarbon gases), NIAP-06-06 (low-temperature CO conversion), AmoMax 10 (synthesis of ammonia), and Со-Al2O3/SiO2 (synthesis of hydrocarbons). The catalysts are tested in the reduction of СО2 using the reverse water gas shift (RWGS) reaction. Cu-containing catalyst NIAP-06-06 is shown to have the highest activity and selectivity in the reduction of СО2, with 97% equilibrium in the RWGS reaction being reached at GHSV = 32 000 h−1, Н2/СО2 = 2, and temperatures of 500–800°C. The possibility is shown of obtaining syngas with the composition required for the synthesis of hydrocarbons and methanol by changing the parameters of СО2 reduction (temperature, Н2/СО2 ratio).","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"16 4","pages":"394 - 404"},"PeriodicalIF":0.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109493","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

Nickel-Containing Catalysts of Ethylene Conversion for Synthesizing Motor Fuel Components and Light Alkenes

IF 0.7

Catalysis in Industry Pub Date : 2025-01-27 DOI: 10.1134/S2070050424700247

T. R. Karpova, A. V. Lavrenov, M. A. Moiseenko, E. A. Buluchevskii, T. I. Gulyaeva, A. B. Arbuzov

{"title":"Nickel-Containing Catalysts of Ethylene Conversion for Synthesizing Motor Fuel Components and Light Alkenes","authors":"T. R. Karpova, A. V. Lavrenov, M. A. Moiseenko, E. A. Buluchevskii, T. I. Gulyaeva, A. B. Arbuzov","doi":"10.1134/S2070050424700247","DOIUrl":"10.1134/S2070050424700247","url":null,"abstract":"Polyfunctional nickel-containing catalysts based on B2O3–Al2O3 and MoO3–Al2O3 oxide supports have been synthesized by sequential impregnation and studied in the conversion of ethylene into C5+ alkenes or propylene. The physicochemical properties of the prepared catalysts has been studied using X-ray diffraction analysis, IR spectroscopy, IR spectroscopy of adsorbed CO, UV-Visible diffuse reflectance spectroscopy (UV-Vis DRS), temperature-programmed reduction of hydrogen (H2-TPR), and temperature-programmed desorption of ammonia (TPD-NH3). The most active catalysts of ethylene oligomerization are NiO/B2O3–Al2O3, where Ni2+ cations chemically bounded to the acidic support are formed. NiO/MoO3–Al2O3 activity in conversion of ethylene to propylene is provided by the presence on the surface of ethylene dimerization active sites, i.e., Ni2+ cations bounded with the support acidic sites, and active sites of metathesis based on monomolybdate species.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"16 4","pages":"405 - 412"},"PeriodicalIF":0.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109494","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

Fabrication of SBA-15-Supported Nanoscale Co3O4 and Its Use in the Catalytic Hydrogenation of Cinnamaldehyde

IF 0.7

Catalysis in Industry Pub Date : 2025-01-27 DOI: 10.1134/S2070050424700223

Ruhul Amin Bepari, Birinchi Kumar Das

{"title":"Fabrication of SBA-15-Supported Nanoscale Co3O4 and Its Use in the Catalytic Hydrogenation of Cinnamaldehyde","authors":"Ruhul Amin Bepari,  Birinchi Kumar Das","doi":"10.1134/S2070050424700223","DOIUrl":"10.1134/S2070050424700223","url":null,"abstract":"Nanoscale Co3O4 has successfully been supported onto the mesoporous SBA-15 following two methods viz. direct deposition (DD) and isonicotinate ligand assisted (INL) route. The later method (INL) involves the formation of cobalt isonicotinate tetrahydrate complex inside mesopore volumes of SBA-15 and subsequent calcination of the cobalt complex loaded SBA-15 composite. The present method is found to be advantageous in reducing the formation of oxide particles outside mesopores. The synthesized materials are investigated by various physical tools such as XRD, SEM, TEM and H2-TPR in combination with N2 adsorption-desorption study. As a promoter, little amount of gold is also deposited in SBA-15 supported Co3O4 samples and all these materials are explored as catalysts in the hydrogenation of cinnamaldehyde. The composite material that is synthesized via DD method has shown promising results in the hydrogenation reaction giving 50% cinnamaldehyde (CAL) conversion with 66% selectivity for hydrocinnamaldehyde (HCAL) at 170°C under the hydrogen pressure of 2 MPa.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"16 4","pages":"372 - 381"},"PeriodicalIF":0.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109299","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

Use of Microalgae Biomass to Synthesize Marketable Products. Part 5: Production of Jet Fuel from Microalgae Biomass

IF 0.7

Catalysis in Industry Pub Date : 2025-01-27 DOI: 10.1134/S2070050424700326

Yu. V. Samoylova, K. N. Sorokina, V. N. Parmon

引用次数: 0

Studying the Kinetic Laws of the Liquid-Phase Oxidation of sec-Butylbenzene in the Presence of N-Hydroxyphthalimide

IF 0.7

Catalysis in Industry Pub Date : 2025-01-27 DOI: 10.1134/S2070050424700272

V. S. Kabanova, A. S. Frolov, E. A. Kurganova, V. N. Sapunov, G. N. Koshel, E. I. Bayov

引用次数: 0