Pub Date : 2022-09-29DOI: 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
Thermochemical properties of molecules and thermodynamic characteristics of vacuum distillate hydrotreatment were calculated by quantumchemical methods. A kinetic model of the hydrotreatment process was developed using a formalized transformation scheme of hydrocarbons. The developed kinetic model was employed in numerical studies aimed to estimate the effect of the feedstock composition on the residual content of heteroatomic components in the product of vacuum gas oil hydrotreatment, the effect of temperature on the content of aromatic hydrocarbons, nitrogen and sulfur in the hydrotreatment product, and the effect of the hydrogen-containing gas consumption on the content of sulfur and hydrogen sulfide in the hydrotreated vacuum gas oil.
{"title":"Mathematical Modeling of the Vacuum Gas Oil Hydrotreatment","authors":"A. M. Vorob’ev, N. Belinskaya, D. Afanasieva, S. Arkenova, T. Kaliev, E. Krivtsov, E. Ivashkina, N. Krivtsova","doi":"10.18412/1816-0387-2022-5-40-52","DOIUrl":"https://doi.org/10.18412/1816-0387-2022-5-40-52","url":null,"abstract":"Thermochemical properties of molecules and thermodynamic characteristics of vacuum distillate hydrotreatment were calculated by quantumchemical methods. A kinetic model of the hydrotreatment process was developed using a formalized transformation scheme of hydrocarbons. The developed kinetic model was employed in numerical studies aimed to estimate the effect of the feedstock composition on the residual content of heteroatomic components in the product of vacuum gas oil hydrotreatment, the effect of temperature on the content of aromatic hydrocarbons, nitrogen and sulfur in the hydrotreatment product, and the effect of the hydrogen-containing gas consumption on the content of sulfur and hydrogen sulfide in the hydrotreated vacuum gas oil.","PeriodicalId":17783,"journal":{"name":"Kataliz v promyshlennosti","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88484178","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}
Pub Date : 2022-09-29DOI: 10.18412/1816-0387-2022-5-61-69
S. Egorova, A. Lamberov
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.
{"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":"65 1","pages":""},"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}
Pub Date : 2022-09-29DOI: 10.18412/1816-0387-2022-5-70-82
N. Gromov, T. Medvedeva, V. N. Panchenko, O. Taran, M. Timofeeva, V. Parmon
It was shown that sorbite can be obtained from potato starch by its single-step hydrolysis-reduction in the presence of bifunctional catalysts 0.3–3 wt.%Ru/Cs3HSiW12O40 (Ru/Cs-HPA). Most efficient was the catalyst containing 1 wt.%Ru; this is related to the optimal concentration ratio of Broensted and Lewis acid sites on the support surface and a high specific surface area. The reaction kinetics in the presence of 1%Ru/Сs-HPA was studied and the apparent activation energy of the starch hydrolysis-reduction to sorbite (80±8 kJ/mol) was determined. The experimental and literature data were used to propose a kinetic model of the process, which describes quite adequately the hydrolysisreduction of starch. In the presence of the catalyst with the optimal composition (1%Ru/Cs-HPA) at the optimal temperature (150 °С), the yield of sorbite achieved 88 mol.% (99 wt.%) for 3 hours of the reaction.
{"title":"A Single-Step Hydrolysis-Reduction of Potato Starch to Sorbite in the Presence of Bifunctional Catalyst Ru/Сs3HSiW12O40","authors":"N. Gromov, T. Medvedeva, V. N. Panchenko, O. Taran, M. Timofeeva, V. Parmon","doi":"10.18412/1816-0387-2022-5-70-82","DOIUrl":"https://doi.org/10.18412/1816-0387-2022-5-70-82","url":null,"abstract":"It was shown that sorbite can be obtained from potato starch by its single-step hydrolysis-reduction in the presence of bifunctional catalysts 0.3–3 wt.%Ru/Cs3HSiW12O40 (Ru/Cs-HPA). Most efficient was the catalyst containing 1 wt.%Ru; this is related to the optimal concentration ratio of Broensted and Lewis acid sites on the support surface and a high specific surface area. The reaction kinetics in the presence of 1%Ru/Сs-HPA was studied and the apparent activation energy of the starch hydrolysis-reduction to sorbite (80±8 kJ/mol) was determined. The experimental and literature data were used to propose a kinetic model of the process, which describes quite adequately the hydrolysisreduction of starch. In the presence of the catalyst with the optimal composition (1%Ru/Cs-HPA) at the optimal temperature (150 °С), the yield of sorbite achieved 88 mol.% (99 wt.%) for 3 hours of the reaction.","PeriodicalId":17783,"journal":{"name":"Kataliz v promyshlennosti","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86268960","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}
Pub Date : 2022-09-27DOI: 10.18412/1816-0387-2022-5-6-14
A. Dvoretskaya, L. G. Anikanova, N. V. Dvoretskii
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.
{"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":"26 1","pages":""},"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}
Pub Date : 2022-07-21DOI: 10.18412/1816-0387-2022-4-58-65
T. V. Bobkova, K. I. Dmitriev, O. Potapenko, V. Doronin, T. P. Sorokina
The study revealed the effect of a clay with different content of iron oxides introduced into the cracking catalyst composition on the distribution of feedstock sulfur in the products and on the amount of sulfur oxides formed upon regeneration of the coked catalyst after cracking of the model sulfur-containing feedstock with a sulfur content of 10 000 ppm from 2-methylthiophene or benzothiophene. The use of a sulfur compound with a higher molecular weight increased the fraction of the feedstock sulfur passing into liquid products and coke. When iron oxidecontent in the catalyst was increased from 0.61 to 1.53 wt.% upon cracking of the model feedstock, the yield of liquid products increased, the conversion of model hydrocarbon decreased, and the yield of coke on the catalyst grew from 3.8 to 5.2 wt.%; in the process, the fraction of the feedstock sulfur that passed into SO2 increased fourfold.
{"title":"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","authors":"T. V. Bobkova, K. I. Dmitriev, O. Potapenko, V. Doronin, T. P. Sorokina","doi":"10.18412/1816-0387-2022-4-58-65","DOIUrl":"https://doi.org/10.18412/1816-0387-2022-4-58-65","url":null,"abstract":"The study revealed the effect of a clay with different content of iron oxides introduced into the cracking catalyst composition on the distribution of feedstock sulfur in the products and on the amount of sulfur oxides formed upon regeneration of the coked catalyst after cracking of the model sulfur-containing feedstock with a sulfur content of 10 000 ppm from 2-methylthiophene or benzothiophene. The use of a sulfur compound with a higher molecular weight increased the fraction of the feedstock sulfur passing into liquid products and coke. When iron oxidecontent in the catalyst was increased from 0.61 to 1.53 wt.% upon cracking of the model feedstock, the yield of liquid products increased, the conversion of model hydrocarbon decreased, and the yield of coke on the catalyst grew from 3.8 to 5.2 wt.%; in the process, the fraction of the feedstock sulfur that passed into SO2 increased fourfold.","PeriodicalId":17783,"journal":{"name":"Kataliz v promyshlennosti","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75345665","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}
Pub Date : 2022-07-21DOI: 10.18412/1816-0387-2022-4-66-74
T. Bogomolova, M. Smirnova, O. Klimov, A. Noskov
Bifunctional catalysts based on NiMo(W) sulfides and a ZSM-23-Al2O3 composite support have been synthesized. Their properties were studied in the transformations of diesel fractions with different nitrogen content (< 1, 10 and 20 ppm). It was demonstrated that the synthesized catalysts could be used to obtain hydrogenizates with the limiting filterability temperature –38 °C, which comply with the requirements of GOST R 55475-2013 to the content of gasoline fraction and aromatic compounds, and the derived cetane number. Properties of the developed catalysts based on NiMo and NiW sulfides and characteristics of the corresponding hydrogenizates were compared with each other. In addition, properties of the developed samples were compared with the properties of a foreign commercial platinum catalyst for isodeparaffinization. The synthesized catalysts were found to be less selective than the reference sample, but more stable to N-containing compounds in the feedstock.
合成了以镍钼(W)硫化物和ZSM-23-Al2O3复合载体为载体的双功能催化剂。研究了不同含氮量(< 1、10和20 ppm)柴油馏分的转化特性。结果表明，所合成的催化剂可在-38℃的极限过滤温度下得到符合GOST R 55475-2013对汽油馏分、芳香族化合物含量及衍生十六烷数要求的加氢产物。比较了所研制的两种硫化物催化剂的性能及其加氢产物的特性。此外，还将制备的样品的性能与国外一种商用铂催化剂的性能进行了比较。合成的催化剂比参考样品的选择性低，但对原料中的含氮化合物更稳定。
{"title":"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","authors":"T. Bogomolova, M. Smirnova, O. Klimov, A. Noskov","doi":"10.18412/1816-0387-2022-4-66-74","DOIUrl":"https://doi.org/10.18412/1816-0387-2022-4-66-74","url":null,"abstract":"Bifunctional catalysts based on NiMo(W) sulfides and a ZSM-23-Al2O3 composite support have been synthesized. Their properties were studied in the transformations of diesel fractions with different nitrogen content (< 1, 10 and 20 ppm). It was demonstrated that the synthesized catalysts could be used to obtain hydrogenizates with the limiting filterability temperature –38 °C, which comply with the requirements of GOST R 55475-2013 to the content of gasoline fraction and aromatic compounds, and the derived cetane number. Properties of the developed catalysts based on NiMo and NiW sulfides and characteristics of the corresponding hydrogenizates were compared with each other. In addition, properties of the developed samples were compared with the properties of a foreign commercial platinum catalyst for isodeparaffinization. The synthesized catalysts were found to be less selective than the reference sample, but more stable to N-containing compounds in the feedstock.","PeriodicalId":17783,"journal":{"name":"Kataliz v promyshlennosti","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84120943","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}
Pub Date : 2022-07-21DOI: 10.18412/1816-0387-2022-4-75-81
A. Krasnoshtanova, A. D. Besyaeva
In this work, the effect exerted by the type of polysaccharide support for immobilization and encapsulation on the stability of chemotrypsin was studied. The synthesized biocatalysts were compared with respect to their proteolytic activity. The highest proteolytic activity equal to 192 U/g was observed for the cellulose-chitosan composite. It was found that immobilization slightly shifts the temperature and pH optima of chemotrypsin; however, they are substantially expanded toward higher temperatures and alkaline pH values. A relative increase in the activity of immobilized chemotrypsin was most pronounced in the case of cellulose-chitosan composite. After a 24 month storage of cellulose-chitosan and cellulose-alginate composites, a decrease in chemotrypsin activity did not exceed 45–50 %. The study revealed that the optimal support for immobilization of chemotrypsin is the cellulose-chitosan composite.
{"title":"A comparative characterization of the properties of biocatalysts containing chemotrypsin immobilized on polysaccharide supports","authors":"A. Krasnoshtanova, A. D. Besyaeva","doi":"10.18412/1816-0387-2022-4-75-81","DOIUrl":"https://doi.org/10.18412/1816-0387-2022-4-75-81","url":null,"abstract":"In this work, the effect exerted by the type of polysaccharide support for immobilization and encapsulation on the stability of chemotrypsin was studied. The synthesized biocatalysts were compared with respect to their proteolytic activity. The highest proteolytic activity equal to 192 U/g was observed for the cellulose-chitosan composite. It was found that immobilization slightly shifts the temperature and pH optima of chemotrypsin; however, they are substantially expanded toward higher temperatures and alkaline pH values. A relative increase in the activity of immobilized chemotrypsin was most pronounced in the case of cellulose-chitosan composite. After a 24 month storage of cellulose-chitosan and cellulose-alginate composites, a decrease in chemotrypsin activity did not exceed 45–50 %. The study revealed that the optimal support for immobilization of chemotrypsin is the cellulose-chitosan composite.","PeriodicalId":17783,"journal":{"name":"Kataliz v promyshlennosti","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83366371","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}
Pub Date : 2022-07-20DOI: 10.18412/1816-0387-2022-4-36-42
A. Arbuzov, V. Drozdov, A. V. Lavrenov, N. N. Leontieva
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.
{"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":"44 1","pages":""},"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}
Pub Date : 2022-07-20DOI: 10.18412/1816-0387-2022-4-51-57
A. Urlukov, S. I. Uskov, D. Potemkin, P. Snytnikov
The paper considers technical feasibility of the direct monetization of casing-head gas, which is being flared now. The proposed approach is based on the technology of low-temperature steam conversion of hydrocarbons, which makes it possible to enhance the quality of flame gases to comply with the requirements on a fuel for gas-piston and gas-turbine power stations. The synthesis and performance of advanced rhodium catalysts for the low-temperature steam conversion of flame gas are discussed. For such catalysts, mixed cerium-zirconium oxides are most promising as the supports. The indicated catalysts have some advantages over the well-studied nickel catalysts in the low-temperature steam conversion of hydrocarbons.
{"title":"Catalytic conversion of flame gas on Rh catalysts with subsequent direct monetization","authors":"A. Urlukov, S. I. Uskov, D. Potemkin, P. Snytnikov","doi":"10.18412/1816-0387-2022-4-51-57","DOIUrl":"https://doi.org/10.18412/1816-0387-2022-4-51-57","url":null,"abstract":"The paper considers technical feasibility of the direct monetization of casing-head gas, which is being flared now. The proposed approach is based on the technology of low-temperature steam conversion of hydrocarbons, which makes it possible to enhance the quality of flame gases to comply with the requirements on a fuel for gas-piston and gas-turbine power stations. The synthesis and performance of advanced rhodium catalysts for the low-temperature steam conversion of flame gas are discussed. For such catalysts, mixed cerium-zirconium oxides are most promising as the supports. The indicated catalysts have some advantages over the well-studied nickel catalysts in the low-temperature steam conversion of hydrocarbons.","PeriodicalId":17783,"journal":{"name":"Kataliz v promyshlennosti","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81861976","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}
Pub Date : 2022-07-20DOI: 10.18412/1816-0387-2022-4-43-50
I. Tarkhanova, A. G. Ali-Zade, A. K. Buryak, V. M. Zelikman
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.
{"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":"20 1","pages":""},"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}
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