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Potential for Converting Geological CO2 Storage Site into Methane Deposits via Indigenous Microorganisms and Mitigating Storage Overpressure Risks (A Review) 利用本地微生物将地质CO2储存地转化为甲烷储存地的潜力及降低储存超压风险(综述)
IF 1.1 4区 工程技术
Petroleum Chemistry Pub Date : 2026-04-16 DOI: 10.1134/S0965544124602941
Rizwan Younas, Mohd Zaidi Jaafar, Shaziera Omar, Muhammad Shahid, Sajid Khan, Muftahu N. Yahya, Muhammad Muhammad
{"title":"Potential for Converting Geological CO2 Storage Site into Methane Deposits via Indigenous Microorganisms and Mitigating Storage Overpressure Risks (A Review)","authors":"Rizwan Younas,&nbsp;Mohd Zaidi Jaafar,&nbsp;Shaziera Omar,&nbsp;Muhammad Shahid,&nbsp;Sajid Khan,&nbsp;Muftahu N. Yahya,&nbsp;Muhammad Muhammad","doi":"10.1134/S0965544124602941","DOIUrl":"10.1134/S0965544124602941","url":null,"abstract":"<p>Microbial methanogenesis can potentially mitigate atmospheric CO<sub>2</sub> emissions while simultaneously establishing new methane reserves. Natural CO<sub>2</sub> fields demonstrate geological stability and are frequently used for enhanced oil recovery. However, anthropogenic CO<sub>2</sub> sequestration entails significant safety risks and operational drawbacks. Long-term global CO<sub>2</sub> storage generates high-pressure environments, poses leakage risks, and requires extensive monitoring. This review evaluates the potential conversion of CO<sub>2</sub> storage site into methane deposits and the mitigation of overpressure risks through the activity of indigenous organisms. Furthermore, the analysis characterizes potential reservoir types, various CH<sub>4</sub> production pathways, microbial communities, and microbial survivability under extreme conditions, alongside the side effects of microorganisms and the overall potential of methanogenic technology. Bacterial conversion of CO<sub>2</sub> to methane is considered as the most effective sequestration process. Depleted oil and gas reservoirs have been identified as optimal sites for CO<sub>2</sub> sequestration and microbial methane restoration, with Methanomicrobiales, Methanobacteriales, and Methanococcales identified as the primary taxa suitable for microbial methane production. Optimized nutritient and substrate delivery can enhance the viability of these organisms under reservoir conditions. Integrating CO<sub>2</sub> sequestration with indigenous microorganisms for microbial methane (CH<sub>4</sub>) production represents an attractive waste recycling strategy. This approach is expected not only to reduce CO<sub>2</sub> emissions and environmental impact, but also to expand methane deposits to meet future energy demands.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"66 2","pages":"155 - 177"},"PeriodicalIF":1.1,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147985226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Halloysite-Supported Cr-Based Catalysts for the CO2-Assisted Oxidative Dehydrogenation of Propane 二氧化碳辅助丙烷氧化脱氢的高岭石负载cr基催化剂
IF 1.1 4区 工程技术
Petroleum Chemistry Pub Date : 2026-04-16 DOI: 10.1134/S0965544126600396
Ekaterina M. Smirnova, Nataliya R. Demikhova, Daniil V. Ekimenkov, Dmitry P. Melnikov
{"title":"Halloysite-Supported Cr-Based Catalysts for the CO2-Assisted Oxidative Dehydrogenation of Propane","authors":"Ekaterina M. Smirnova,&nbsp;Nataliya R. Demikhova,&nbsp;Daniil V. Ekimenkov,&nbsp;Dmitry P. Melnikov","doi":"10.1134/S0965544126600396","DOIUrl":"10.1134/S0965544126600396","url":null,"abstract":"<p>A series of chromium-based catalysts supported on halloysite/boehmite with varying Cr loadings (<i>x</i>Cr/HNT/Al<sub>2</sub>O<sub>3</sub>, where <i>x</i> = 3, 5, and 7 wt %) were synthesized for the oxidative dehydrogenation of propane. The effects of calcination temperature (550–700°C) on the textural and structural properties of the supports were investigated. The support calcined at 550°C showed optimal properties, including a specific surface area of 143 m<sup>2</sup>/g, a pore volume of 0.26 cm<sup>3</sup>/g, and a crushing strength of 3.3 N/mm<sup>2</sup>. As the Cr loading and reaction temperature were increased, the selectivity toward the desired product (propylene) declined due to the intensification of side reactions such as cracking and hydrogenolysis, which produce methane, ethane, and ethylene. The optimum activity/selectivity balance was achieved with the catalyst that contained 5 wt % Cr. At 650°C this sample provided the highest propylene space-time yield (7.2 mol kg<sup>–1</sup> h<sup>–1</sup>) and an optimal balance of propane conversion (40.7%) and propylene selectivity (66.2%).</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"66 3","pages":"287 - 294"},"PeriodicalIF":1.1,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148208716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and Properties of Diesters Based on Synthetic Petroleum Acids and 1,4-Butanediol 合成石油酸和1,4-丁二醇二酯的合成及性能研究
IF 1.1 4区 工程技术
Petroleum Chemistry Pub Date : 2026-04-07 DOI: 10.1134/S0965544126600311
Lala M. Afandiyeva, Gunay G. Nasibova, Nazile F. Sadiyeva, Sayyara G. Aliyeva, Anton S. Lyadov, Yutta. P. Cherepnova, Shahnaz N. Asadova
{"title":"Synthesis and Properties of Diesters Based on Synthetic Petroleum Acids and 1,4-Butanediol","authors":"Lala M. Afandiyeva,&nbsp;Gunay G. Nasibova,&nbsp;Nazile F. Sadiyeva,&nbsp;Sayyara G. Aliyeva,&nbsp;Anton S. Lyadov,&nbsp;Yutta. P. Cherepnova,&nbsp;Shahnaz N. Asadova","doi":"10.1134/S0965544126600311","DOIUrl":"10.1134/S0965544126600311","url":null,"abstract":"<p>A mixture of synthetic petroleum acids (SPAs), obtained via liquid-phase oxidation of naphthene–paraffinic hydrocarbons from a kerosene fraction, was used for the catalytic esterification of 1,4-butanediol. Under optimal reaction conditions (a temperature of 120°C, a catalyst loading of 1.5 wt %, and a SPA/1,4-butanediol molar ratio of 2 : 1.5), a diester mixture was synthesized in 92% yield. These diesters were evaluated as plasticizers for polyvinyl chloride (PVC) grade S-6358. The PVC/diester blends exhibited a full swelling time of 5–6 h, which is 2–3 h shorter than that for commercial dioctyl phthalate, a commonly used plasticizer. Furthermore, the synthesized diester mixture was tested as a multifunctional additive for diesel fuels. At a concentration of 0.004 wt %, the diesters notably enhanced the thermo-oxidative stability of the diesel fuel. Separately, adding 0.05 wt % diesters lowered the cloud point of the fuel by 9°C (to –11°C) and its pour point by 5°C (to –25°C) without adversely affecting its cetane number (CN). These results demonstrate the feasibility of using SPAs as available feedstocks for functional materials and fuel additives.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"66 3","pages":"335 - 340"},"PeriodicalIF":1.1,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148208757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Catalytic Activity and Stability of Alkaline Phosphatase and β-Galactosidase on Aluminosilicate Adsorbents 碱性磷酸酶和β-半乳糖苷酶在铝硅酸盐吸附剂上的催化活性和稳定性
IF 1.1 4区 工程技术
Petroleum Chemistry Pub Date : 2026-04-07 DOI: 10.1134/S0965544126600268
Larisa F. Atyaksheva, Artur Yu. Fastov, Sergey A. Fastov, Daniil A. Fedosov
{"title":"Catalytic Activity and Stability of Alkaline Phosphatase and β-Galactosidase on Aluminosilicate Adsorbents","authors":"Larisa F. Atyaksheva,&nbsp;Artur Yu. Fastov,&nbsp;Sergey A. Fastov,&nbsp;Daniil A. Fedosov","doi":"10.1134/S0965544126600268","DOIUrl":"10.1134/S0965544126600268","url":null,"abstract":"<p>This study investigates the catalytic activity and thermal stability of two enzymes—alkaline phosphatase and β-galactosidase—immobilized on the surface of BEA and MFI-type zeolites, as well as on natural aluminosilicate halloysite nanotubes (HNTs). The catalytic performance parameters (activity and Michaelis constant) were evaluated for all prepared catalysts. Thermal inactivation of the enzymes on the adsorbent surfaces was studied at 50, 55, and 60°C, and the first-order effective rate constants for inactivation (denaturation) and the corresponding activation energies were determined. The adsorbed enzyme layers partially retained their catalytic activity, while their thermal stability was significantly enhanced.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"66 5","pages":"585 - 592"},"PeriodicalIF":1.1,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Environmentally Friendly Multifunctional Additive for Catalytic Cracking 一种环保型催化裂化多功能添加剂
IF 1.1 4区 工程技术
Petroleum Chemistry Pub Date : 2026-04-07 DOI: 10.1134/S0965544125600584
Shuping Yang, Chenyang Li, Bo Li, Xiaoqiang Wang, Zhengguo Tan, Xionghou Gao
{"title":"An Environmentally Friendly Multifunctional Additive for Catalytic Cracking","authors":"Shuping Yang,&nbsp;Chenyang Li,&nbsp;Bo Li,&nbsp;Xiaoqiang Wang,&nbsp;Zhengguo Tan,&nbsp;Xionghou Gao","doi":"10.1134/S0965544125600584","DOIUrl":"10.1134/S0965544125600584","url":null,"abstract":"<p>Metal passivator technology is the most widely adopted strategy for inhibiting heavy metal poisoning in catalytic cracking. In this study, a simple, efficient, and environmentally friendly multifunctional additive has been developed by selecting non-toxic components. The mechanism of action of this additive was characterized via TPR, BET, and XRD, and its performance was evaluated in a catalytic cracking riser unit. The results demonstrate that the multifunctional additive reduces dry gas yield by 0.40 percentage points, hydrogen yield by 15.8%, coke yield by 1.09 percentage points, and heavy oil yield by 0.45 percentage points. Concurrently, gasoline and overall light oil yields increased by 2.18 and 2.87 percentage points, respectively. The additive exhibits excellent efficacy in suppressing Ni and V poisoning while optimizing product distribution.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"66 2","pages":"146 - 154"},"PeriodicalIF":1.1,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147985244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of Platinum-Group Promoters for Cobalt-Based Catalysts on Fischer-Tropsch Performance 铂基促进剂对钴基催化剂费托性能的影响
IF 1.1 4区 工程技术
Petroleum Chemistry Pub Date : 2026-03-18 DOI: 10.1134/S0965544126600220
Oleg L. Eliseev, Dmitry P. Melnikov, Ekaterina M. Smirnova, Ruslan V. Kazantsev, Nataliya R. Demikhova, Anna V. Stavitskaya
{"title":"Effects of Platinum-Group Promoters for Cobalt-Based Catalysts on Fischer-Tropsch Performance","authors":"Oleg L. Eliseev,&nbsp;Dmitry P. Melnikov,&nbsp;Ekaterina M. Smirnova,&nbsp;Ruslan V. Kazantsev,&nbsp;Nataliya R. Demikhova,&nbsp;Anna V. Stavitskaya","doi":"10.1134/S0965544126600220","DOIUrl":"10.1134/S0965544126600220","url":null,"abstract":"<p>A series of alumina-supported cobalt catalysts promoted with palladium, platinum, and ruthenium were investigated for the synthesis of hydrocarbons from CO and H<sub>2</sub>. The addition platinum-group metals facilitated the reduction of cobalt and significantly enhanced catalytic activity. At high CO conversion levels, the CO<sub>2</sub> content in the gaseous products increased considerably, most likely due to a shift in the water–gas equilibrium toward the right. At a low synthesis temperature (210°C), the 0.15%Ru–15%Co/Al<sub>2</sub>O<sub>3</sub> catalyst demonstrated the highest performance: it exhibited the greatest selectivity toward C<sub>5+</sub> hydrocarbons (84.6%) alongside the lowest methane selectivity (8.6%), at CO conversion of 31.0%. However, at 240°C, when CO conversion increased to 86–89%, the selectivity advantages of the Ru- and Pt-promoted catalysts diminished. Under these same conditions, the Pd-promoted catalyst maintained a sufficiently high C<sub>5+</sub> selectivity (72.3%), and the content of the valuable diesel fraction (C<sub>11</sub>–C<sub>18</sub>) in the synthesized hydrocarbons reached its highest level, accounting for 52% of the total C<sub>5+</sub> products.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"66 3","pages":"270 - 276"},"PeriodicalIF":1.1,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148208717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Plasma-Assisted Synthesis and Mechanisms of Action of (Ni/Cu)/γ-Al2O3 Catalysts for Heavy Oil Upgrading 等离子体辅助合成(Ni/Cu)/γ-Al2O3重油提质催化剂及其作用机理
IF 1.1 4区 工程技术
Petroleum Chemistry Pub Date : 2026-03-18 DOI: 10.1134/S096554412460276X
Quanli Wang, Ruochang Li, Yanbin Xin, Jingfeng Dong, Jiabin Wang, Jing Zhao, Peili Zhang, Bing Sun
{"title":"Plasma-Assisted Synthesis and Mechanisms of Action of (Ni/Cu)/γ-Al2O3 Catalysts for Heavy Oil Upgrading","authors":"Quanli Wang,&nbsp;Ruochang Li,&nbsp;Yanbin Xin,&nbsp;Jingfeng Dong,&nbsp;Jiabin Wang,&nbsp;Jing Zhao,&nbsp;Peili Zhang,&nbsp;Bing Sun","doi":"10.1134/S096554412460276X","DOIUrl":"10.1134/S096554412460276X","url":null,"abstract":"<p><i>In situ</i> catalytic hydrocracking is a highly promising approach for improving heavy oil recovery. However, high reaction temperatures and prolonged processing times in the complex geological environments of oil reservoirs hinder the large-scale application of this method. In this study, dielectric barrier discharge (DBD) plasma was used to rapidly synthesize two catalysts, Ni/γ-Al<sub>2</sub>O<sub>3</sub> and Ni-Cu/γ-Al<sub>2</sub>O<sub>3</sub>, for heavy oil upgrading. Changes in the physical properties (including density, viscosity, American Petroleum Institute (API) gravity) and chemical composition (including elemental composition, functional groups, and evolved gases) of the oil samples were analyzed prior and after upgrading. Based on these analyses, the mechanism of catalytic heavy oil upgrading was elucidated. Following catalytic upgrading, both catalysts achieved a viscosity reduction exceeding 53% within a short time. Notably, the catalyst with the nickel phase content of 1.28% exhibited a viscosity reduction ratio of 57.28% after a 10-min discharge treatment, while simultaneously achieving effective desulfurization. The results indicate that Ni/γ-Al<sub>2</sub>O<sub>3</sub> catalysts are more favorable for the side-chain scission and ring-opening of saturated hydrocarbons and colloidal components, whereas Ni-Cu/γ-Al<sub>2</sub>O<sub>3</sub> catalysts better suit for the hydrocracking and ring-opening of asphaltenes and aromatic hydrocarbons. This study provides an effective method for preparing high-performance catalysts for heavy oil upgrading using atmospheric pressure plasmas and offers insights into the catalytic effects of the heavy oil upgrading process.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"66 2","pages":"127 - 145"},"PeriodicalIF":1.1,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147985243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Oxidation of Tar over Manganese Catalysts 锰催化剂上焦油的氧化
IF 1.1 4区 工程技术
Petroleum Chemistry Pub Date : 2026-03-18 DOI: 10.1134/S0965544126600232
Vagif M. Abbasov, Lala M. Afandiyeva, Yutta P. Cherepnova, Gunay G. Nasibova, Saida F. Ahmadbayova, Nushaba M. Aliyeva, Anton S. Lyadov, Emin I. Azizbayli
{"title":"Oxidation of Tar over Manganese Catalysts","authors":"Vagif M. Abbasov,&nbsp;Lala M. Afandiyeva,&nbsp;Yutta P. Cherepnova,&nbsp;Gunay G. Nasibova,&nbsp;Saida F. Ahmadbayova,&nbsp;Nushaba M. Aliyeva,&nbsp;Anton S. Lyadov,&nbsp;Emin I. Azizbayli","doi":"10.1134/S0965544126600232","DOIUrl":"10.1134/S0965544126600232","url":null,"abstract":"<p>This study investigates the effects of a catalytic modifier based on manganese salts of natural petroleum acids on the performance of tar oxidation and the properties of the resulting bitumen product. It is demonstrated that, compared to noncatalytic tar oxidation, the proposed catalyst not only more than doubles the process intensity but also significantly improves the product quality. IR spectroscopy showed that an optimal catalyst loading (0.3 wt %) provides an appreciable increase in the degree of oxidation (&gt;30%) and aromaticity (&gt;10%) of the bitumen, while preserving its aliphatic components, which act as a plasticizer. The formation of polar carbonyl groups enhances the adhesive capacity of the product, whereas the increased aromaticity favors its thermal stability as a binder. The study results validate the effectiveness of the proposed catalytic approach for producing bitumen with improved performance characteristics.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"66 3","pages":"295 - 300"},"PeriodicalIF":1.1,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148208708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Kinetic Features of Cumene Dehydrogenation over Porous Catalytic Converters 多孔催化转化器上异丙烯脱氢的动力学特征
IF 1.1 4区 工程技术
Petroleum Chemistry Pub Date : 2026-03-16 DOI: 10.1134/S0965544125601620
Alexey S. Fedotov, Danil Yu. Grachev, Roman D. Kapustin
{"title":"Kinetic Features of Cumene Dehydrogenation over Porous Catalytic Converters","authors":"Alexey S. Fedotov,&nbsp;Danil Yu. Grachev,&nbsp;Roman D. Kapustin","doi":"10.1134/S0965544125601620","DOIUrl":"10.1134/S0965544125601620","url":null,"abstract":"<p>The kinetics of cumene dehydrogenation in the channels of porous ceramic converters modified with tungsten oxide were investigated. It was shown that, under the reaction conditions studied, this process occurs far from thermodynamic equilibrium in an open system and follows a first-order kinetic equation with respect to cumene. Based on the effective activation energy (161 kJ/mol) and an analysis of the reaction rate–temperature relationship, a stepwise sequence of surface dehydrogenation reactions over WO<sub>3</sub> is proposed: adsorption of cumene on W<sup>6+</sup> acid sites, hydrogen abstraction leading to the formation of metastable carbenium ions, and hydrogen recombination on the catalyst surface. The resulting activation energy and pre-exponential factor (1.85 × 10<sup>8</sup>) are consistent with values previously reported for the dehydrogenation of alkylbenzenes over oxide catalysts, thereby supporting the validity of the proposed kinetic model.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"66 1","pages":"14 - 27"},"PeriodicalIF":1.1,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147559692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Selective Alkylation of Toluene with Diethyl Carbonate over MgO- and Pd-Modified ZSM-5 Catalysts MgO和pd改性ZSM-5催化剂上甲苯与碳酸二乙酯的选择性烷基化反应
IF 1.1 4区 工程技术
Petroleum Chemistry Pub Date : 2026-03-05 DOI: 10.1134/S0965544126600256
Michail D. Kryuchkov, Leonid A. Kulikov, Ivan S. Levin, Eduard A. Karakhanov, Anton L. Maximov
{"title":"Selective Alkylation of Toluene with Diethyl Carbonate over MgO- and Pd-Modified ZSM-5 Catalysts","authors":"Michail D. Kryuchkov,&nbsp;Leonid A. Kulikov,&nbsp;Ivan S. Levin,&nbsp;Eduard A. Karakhanov,&nbsp;Anton L. Maximov","doi":"10.1134/S0965544126600256","DOIUrl":"10.1134/S0965544126600256","url":null,"abstract":"<p>The alkylation of toluene with diethyl carbonate (DEC) was studied over ZSM-5 (MFI) zeolite catalysts modified with magnesium oxide and palladium. MgO modification effectively suppressed strong Brønsted acid sites, leading to enhanced para-selectivity by inhibiting disproportionation, isomerization, and deep alkylation reactions. The introduction of palladium provided hydrogenation–dehydrogenation functionality, markedly improving catalyst stability by suppressing olefin oligomerization and coke formation. As a result, high selectivity toward <i>p</i>-ethyltoluene was achieved at moderate toluene conversion under optimized conditions. The influence of reaction temperature, space velocity, and toluene/DEC molar ratio on catalytic performance was systematically investigated. Toluene conversion exhibited non-monotonic behavior with respect to these parameters, reflecting a balance between DEC activation, reactant contact time, and catalyst deactivation. Optimal operating conditions provided high para-selectivity while limiting secondary isomerization and polyalkylation reactions. Fresh and spent catalysts were characterized by XRD, N<sub>2</sub> physisorption, NH<sub>3</sub>-TPD, Py-IR, TEM, TGA, and DSC. These analyses revealed that MgO modification alone leads to the formation of condensed, pore-blocking coke, whereas palladium alters the nature of carbonaceous deposits toward less condensed species, thereby enhancing catalyst stability. Compared with literature systems based on alcohols and other carbonates, the developed catalysts operate at lower alkylating-agent excess and higher space velocities while maintaining competitive conversion and para-selectivity.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"66 1","pages":"28 - 48"},"PeriodicalIF":1.1,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147559083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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