Conversion of syngas to hydrocarbons using bifunctional cobalt catalysts containing HZSM-5 zeolites of various porous structures

IF 1.7 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Russian Chemical Bulletin Pub Date : 2024-10-26 DOI:10.1007/s11172-024-4371-y

O. P. Papeta, I. N. Zubkov, V. M. Chernyshev, D. V. Chernysheva, E. M. Bayan, A. P. Savost’yanov, A. N. Saliev, M. R. Agliullin, R. E. Yakovenko

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Abstract

New bifunctional composite catalysts for the Fischer—Tropsch synthesis were developed on the basis of a mixture of the Co—Al₂O₃/SiO₂ catalyst, meso-HZSM-5 hierarchical mesoporous zeolite, and boehmite binder. The mesoporous zeolite was obtained by alkaline treatment of the industrial HZSM-5 zeolite. The developed catalysts are suitable for one-pot conversion of syngas into linear C₅₊ hydrocarbons, which then undergo cracking and isomerization reactions. The effect of the concentration of NaOH solution on the porosity and catalytic efficiency of the obtained meso-HZSM-5 zeolite was studied. The performances of the bifunctional catalysts obtained from alkali-treated and pristine HZSM-5 in the conversion of syngas were compared. In the presence of the catalyst based on the alkali-treated zeolite, the total productivity to C₅₊ hydrocarbons somewhat decreases. However, the increase in the total yield of branched and unsaturated hydrocarbons provides the formation of motor fuels with high anti-knock properties.

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使用含有不同多孔结构的 HZSM-5 沸石的双功能钴催化剂将合成气转化为碳氢化合物

在 Co-Al2O3/SiO2 催化剂、meso-HZSM-5 分层介孔沸石和沸石粘合剂混合物的基础上，开发了用于费托合成的新型双功能复合催化剂。介孔沸石是通过对工业用 HZSM-5 沸石进行碱性处理而获得的。所开发的催化剂适用于将合成气一锅转化为线性 C5+ 碳氢化合物，然后进行裂化和异构化反应。研究了 NaOH 溶液浓度对所得介孔 HZSM-5 沸石孔隙率和催化效率的影响。比较了碱处理过的双功能催化剂和原始 HZSM-5 在合成气转化中的性能。在碱处理沸石催化剂的作用下，C5+碳氢化合物的总产率有所下降。然而，支链烃和不饱和烃总产量的增加，可形成具有高抗爆性能的汽车燃料。

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来源期刊

Russian Chemical Bulletin 化学-化学综合

CiteScore

2.70

自引率

47.10%

发文量

257

审稿时长

3-8 weeks

期刊介绍： Publishing nearly 500 original articles a year, by leading Scientists from Russia and throughout the world, Russian Chemical Bulletin is a prominent international journal. The coverage of the journal spans practically all areas of fundamental chemical research and is presented in five sections: General and Inorganic Chemistry; Physical Chemistry; Organic Chemistry; Organometallic Chemistry; Chemistry of Natural Compounds and Bioorganic Chemistry.