Hierarchical zeolite Y supported cobalt bifunctional catalyst for facilely tuning the product distribution of Fischer-Tropsch synthesis

FUEL

卷:148

Article

Xing, Chuang^1,2  Yang, Guohui²  Wu, Mingbo³  Yang, Ruiqin¹  Tan, Li²  Zhu, Pengfei²  Wei, Qinhong²  Li, Jie²  Mao, Jianwei¹  Yoneyama, Yoshiharu²  Tsubaki, Noritatsu^1,2 

[1] Zhejiang Univ Sci & Technol, Sch Biol & Chem Engn, Zhejiang Prov Key Lab Chem & Bio Proc Technol Far, Hangzhou 310023, Zhejiang, Peoples R China

[2] Toyama Univ, Dept Appl Chem, Grad Sch Engn, Toyama 9308555, Japan

[3] China Univ Petr, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China

关键词: Fischer-Tropsch synthesis;    Isoparaffin;    Hierarchical;    Zeolite Y;    Mesopore;   

DOI  :  10.1016/j.fuel.2015.01.040

来源: Elsevier

【 摘 要 】

A two-step method consisting of acid leaching and base leaching was developed and applied to create hierarchical pores on a general microporous Y zeolite. Characterization with BET and TEM on the texture, morphology and structure of the prepared hierarchical Y zeolite confirmed the co-existence of mesopores with zeolitic walls. The analysis results showed that the mesopore surface area and pore volume of the hierarchical zeolite Y (Y-ABx, A: acid leaching, B: base leaching, x'' represents for base leaching time) increased with increasing the base leaching time. The hierarchical zeolite Y supported Co as catalysts were employed to catalyze the hydrogenation of carbon monoxide to form hydrocarbons through Fischer-Tropsch synthesis (FTS) reaction. The CO conversion and C5-11 selectivity on Co/Y-ABx catalysts increased significantly compared with those on the pristine Y supported Co catalyst. The isoparaffin selectivity of Co/Y-AB4 catalyst reached up to 52.3% and middle hydrocarbons became the main FTS products due to the optimized hydrocracking and isomerization function afforded by the hierarchical zeolite Y with the strong Bronsted acid/Lewis acid (B/L) ratio and textural property. (C) 2015 Elsevier Ltd. All rights reserved.

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