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Dehydration of Castor Oil over a NaHSO 4 /MCM‐41 Catalyst Prepared by Supercritical Impregnation
Author(s) -
Ding Jian-Fei,
Ma Tian-Lin,
Yan Cui-Xia,
Shao Rong,
Xu Wei,
Guan Rong-Feng,
Song Xiao-Yong,
Wang Peng-Fei
Publication year - 2018
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201800028
Subject(s) - castor oil , chemistry , supercritical fluid , dehydration , catalysis , leaching (pedology) , nuclear chemistry , chemical engineering , organic chemistry , biochemistry , environmental science , soil science , engineering , soil water
The NaHSO 4 /MCM‐41 catalyst was synthesized by supercritical impregnation and investigated in dehydration of castor oil. The NaHSO 4 /MCM‐41 prepared by wet impregnation was also tested. The supercritical condition was favorable to improve NaHSO 4 dispersion. The amount of interaction sites between NaHSO 4 and MCM‐41 was enhanced and NaHSO 4 leaching was retarded. Surface area, pore volume and size, total amount of acid sites, and the ratio of Brønsted to total acidity were increased. The Brønsted acid sites and the weaker acid strength were beneficial to produce dehydrated castor oil (DCO). Therefore, coke formation was retarded and castor oil conversion, DCO selectivity, and stability of the catalyst were obviously improved.