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

期刊论文
发表日期：

2024年9月1日

查看全文

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

摘要

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.