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A Hydrophilic Supported Fe 3 O 4 Catalyst with Enhanced Light Olefins Selectivity in the Fischer‐Tropsch Synthesis
Author(s) -
Ma Long,
Zhang Yuxi,
Gao Xinhua,
Atchimarungsri Thachapan,
Ma Qingxiang,
Zhang Jianli,
Zhang Xingjun,
Li Caihu,
Zhao TianSheng
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202102614
Subject(s) - catalysis , fischer–tropsch process , selectivity , olefin fiber , product distribution , desorption , adsorption , x ray photoelectron spectroscopy , chemistry , hydrothermal synthesis , particle size , materials science , nuclear chemistry , hydrothermal circulation , chemical engineering , organic chemistry , engineering
A series of Fe 3 O 4 catalysts supported on chitosan (CTS) were prepared through successive hydrothermal synthesis, cross‐linking, and mechanical mixing of CTS. The prepared catalysts were characterized by SEM, XRD, N 2 adsorption‐desorption, XPS, FT−IR, TG, H 2 −TPR, CO−TPD, C 3 H 6 −TPD, and contact angle (CA) analysis, then evaluated for their performance in the Fischer‐Tropsch synthesis (FTS). CTS supported Fe 3 O 4 catalyst increased the hydrophilicity of the pristine un‐supported Fe 3 O 4 . Results revealed that the catalysts exhibit high activity with tuned product distribution in FTS. The water gas shift reaction is facilitated over the Fe 3 O 4 /CTS catalysts, and their selectivity for light olefins is significantly improved by inhibiting the secondary reaction of the initial olefins, which was confirmed by C 3 H 6 −TPD experiments. The Fe 3 O 4 particle size has a significant influence on product distribution, with larger Fe 3 O 4 particles being beneficial to the formation of light olefins. The 30 % Fe 3 O 4 /CTS catalyst has light olefin selectivity of 35 % with an O/P value of 2.19, which are higher than those of 21 % and 0.62 over the pristine Fe 3 O 4 .