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Selective Transformation of Syngas into Gasoline‐Range Hydrocarbons over Mesoporous H‐ZSM‐5‐Supported Cobalt Nanoparticles
Author(s) -
Cheng Kang,
Zhang Lei,
Kang Jincan,
Peng Xiaobo,
Zhang Qinghong,
Wang Ye
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201405277
Subject(s) - isomerization , syngas , bifunctional , mesoporous material , selectivity , gasoline , catalysis , product distribution , chemistry , nanoparticle , oxygenate , cobalt , chemical engineering , bifunctional catalyst , octane rating , organic chemistry , engineering
Bifunctional Fischer–Tropsch (FT) catalysts that couple uniform‐sized Co nanoparticles for CO hydrogenation and mesoporous zeolites for hydrocracking/isomerization reactions were found to be promising for the direct production of gasoline‐range (C 5–11 ) hydrocarbons from syngas. The Brønsted acidity results in hydrocracking/isomerization of the heavier hydrocarbons formed on Co nanoparticles, while the mesoporosity contributes to suppressing the formation of lighter (C 1–4 ) hydrocarbons. The selectivity for C 5–11 hydrocarbons could reach about 70 % with a ratio of isoparaffins to n ‐paraffins of approximately 2.3 over this catalyst, and the former is markedly higher than the maximum value (ca. 45 %) expected from the Anderson–Schulz–Flory distribution. By using n ‐hexadecane as a model compound, it was clarified that both the acidity and mesoporosity play key roles in controlling the hydrocracking reactions and thus contribute to the improved product selectivity in FT synthesis.