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Iron‐Based Fischer–Tropsch Synthesis for the Efficient Conversion of Carbon Dioxide into Isoparaffins
Author(s) -
Geng Shunshun,
Jiang Feng,
Xu Yuebing,
Liu Xiaohao
Publication year - 2016
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201600058
Subject(s) - fischer–tropsch process , catalysis , selectivity , zeolite , syngas , chemistry , gasoline , chemical engineering , carbon dioxide , organic chemistry , engineering
Iron‐based Fischer–Tropsch (FT) synthesis in combination with hydroisomerization in the presence of zeolites for the synthesis of isoparaffins from CO 2 /H 2 was conducted in a fixed‐bed reactor. Relative to supported iron catalysts, the precipitated one efficiently converted intermediate CO into hydrocarbons by supplying a high density of FT active sites on the catalyst surface. Removing water by interstage cooling and promoting the CO conversion step in the FT synthesis were effective approaches in achieving a high CO 2 conversion, because of an increase in the driving force to the reaction equilibrium. Particle mixing of 92.6 Fe7.4 K with either 0.5 Pd/β or HZSM‐5 zeolite effectively hydroisomerized the resulting FT hydrocarbons into gasoline‐range isoparaffins. Particularly, HZSM‐5 displayed a higher isoparaffin selectivity at approximately 70 %, which resulted from easier hydrocracking and hydroisomerization of the olefinic FT primary products.