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Ceria‐Zirconia/Zeolite Bifunctional Catalyst for Highly Selective Conversion of Syngas into Aromatics
Author(s) -
Huang Zhen,
Wang Sheng,
Qin Feng,
Huang Liang,
Yue Yinghong,
Hua Weiming,
Qiao Minghua,
He Heyong,
Shen Wei,
Xu Hualong
Publication year - 2018
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.201800911
Subject(s) - syngas , bifunctional , catalysis , bifunctional catalyst , zeolite , cubic zirconia , aromatization , chemistry , selectivity , oxygen , oxygenate , inorganic chemistry , chemical engineering , materials science , organic chemistry , ceramic , engineering
Ceria‐zirconia solid solutions with tunable surface oxygen vacancy have been used in the direct conversion of syngas into aromatics after coupling with ZSM‐5 zeolite. A high selectivity of 83.1 % to aromatics has been achieved from syngas with low H 2 /CO ratio over Ce 0.2 Zr 0.8 O 2 /ZSM‐5 bifunctional catalyst. The surface oxygen vacancy of Ce 0.2 Zr 0.8 O 2 is supposed to facilitate the formation of oxygenates which act as intermediates for C−C coupling and aromatization on ZSM‐5, and thus contribute to the well kinetic matching between C−O activation and C−C coupling over these two components of catalyst. The ceria‐zirconia with abundant surface oxygen vacancies and enhanced lattice oxygen mobility intimately mixed with ZSM‐5 zeolite with moderate acidity and crystal size play an important role in the catalytic performance.