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Dehydrogenation of Propane to Propylene over Ga 2 O 3 Supported on Mesoporous HZSM‐5 in the Presence of CO 2
Author(s) -
Xie Yuqing,
Hua Weiming,
Yue Yinghong,
Gao Zi
Publication year - 2010
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201090265
Subject(s) - dehydrogenation , chemistry , propane , mesoporous material , catalysis , selectivity , yield (engineering) , propene , inorganic chemistry , chemical engineering , organic chemistry , composite material , materials science , engineering
Dehydrogenation of propane to propylene over mesoporous HZSM‐5 supported Ga 2 O 3 catalysts in the presence of CO 2 has been investigated, and compared with that of conventional HZSM‐5 supported one. The initial activity of the catalysts descends while the stability and selectivity to propylene improve with increasing the Si/Al ratios of the support. The optimal Si/Al ratio is 240 for the propylene yield reaching 21.7% after reaction for 50 h. The introduction of the mesopores improves the activity as well as the stability of the catalyst, due to the better transport of the reactant and product molecules caused by its hierarchical structure. The selectivity for bulky products such as aromatics is also increased. The promoting effect of CO 2 on the dehydrogenation reaction is observed.