Hits:

Indexed by:期刊论文

Date of Publication:2017-01-01

Journal:RSC ADVANCES

Included Journals:SCIE、EI、Scopus

Volume:7

Issue:60

Page Number:37915-37922

ISSN No.:2046-2069

Abstract:A series of boron-containing ZSM-5 (B-ZSM-5) catalysts with particle sizes from similar to 153 nm to similar to 14.2 mu m are synthesized by regulating the addition of silicalite-1 seeds. The B-ZSM-5 particle size with seed addition (D), the seed addition amount (x), the seed particle size (d) and the B-ZSM-5 particle size without seed addition (D-0) are related with by the new function D-3 = d(3)D(0)(3)/[xD(0)(3) + (1-x)d(3)], and the particle size of B-ZSM-5 has been precisely controlled and predicted in both micro (TPABr as template) and nano (TPAOH as template) synthesis systems. The function also shows the evolution of B-ZSM-5 particle size versus the seed amount and size, which helps guide the synthetic choice of the seed amount used or decreasing the seed size to decrease the B-ZSM-5 size for a specific synthesis system. Furthermore, the effect of particle size on the catalytic performance of B-ZSM-5 for the methanol to propylene (MTP) reaction is also investigated. The addition of 1 wt% similar to 74 nm seeds to the synthesis system improves the resulting catalyst lifetime from 46 h to 794 h.