Preparation of phosphorus-modified PITQ-13 catalysts and their performance in 1-butene catalytic cracking

Journal of Energy Chemistry, Volume 23, Issue 2, March 2014, Pages 193–200
Preparation of phosphorus-modified PITQ-13 catalysts and their performance in 1-butene catalytic cracking
Penghui Zeng (a),  (b),
Yun Liang (b), Shengfu Ji (a), Baojian Shen (b), Honghai Liu (c), Baojie Wang (c), Hongjuan Zhao (c), Mingfu Li (b)
a State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
b State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
c Lanzhou Petrochemical Center, Petrochemical Research Institute, Petro China Company Limited, Lanzhou 730060, Gansu, China
Abstract
Reports preparation of a series of phosphorus-modified PITQ-13 catalysts by wet impregnation of NH4H2PO4 solution into an HITQ-13 parent. Researchers examined their catalytic performance in 1-butene catalytic cracking in a fixed fluidized bed reactor.
Results revealed that the crystallinity, surface area and pore volume of P-modified PITQ-13 catalysts decreased with increasing amounts of P. The number of weak acid sites increased, while strong acidity decreased. The selectivity to propylene in 1-butene cracking reactions increased because of the decrease in strong acidity.
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