Precise control of the size of zeolite B-ZSM-5 based on seed surface crystallization

Chengyi Dai, Junjie Li, Anfeng Zhang, Changhong Nie, Chunshan Song, Xinwen Guo

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A series of boron-containing ZSM-5 (B-ZSM-5) catalysts with particle sizes from ∼153 nm to ∼14.2 μm 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 (D0) are related with by the new function D3 = d3D03/[xD03 + (1 - x)d3], 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% ∼74 nm seeds to the synthesis system improves the resulting catalyst lifetime from 46 h to 794 h.

Original languageEnglish (US)
Pages (from-to)37915-37922
Number of pages8
JournalRSC Advances
Volume7
Issue number60
DOIs
StatePublished - Jan 1 2017

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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