Synthesis of HZSM-5@silicalite-1 core-shell composite and its catalytic application in the generation of p-xylene by methylation of toluene with methyl bromide

Yi Qiang Deng, Wei Fang Zhou, Hao Ming Lv, Ying Ying Zhang, Chak Tong AU, Shuang Feng Yin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

A core-shell HZSM-5@silicalite-1 composite was synthesized by overgrowing silicalite-1 on the external surface of HZSM-5, and was characterized by XRD, SEM, TEM, NH3-TPD, 1,3,5-triisopropylbenzene (TIPB) cracking and N2 adsorption-desorption techniques. When used as a catalyst for the formation of p-xylene through toluene methylation with methyl bromide, the HZSM-5@silicalite-1 composite exhibits para-selectivity of up to 76% with no evidence of deactivation in an on stream period of 3 h. The excellent catalytic performance is attributed to the inactive silicalite-1 shell that extends the diffusion path length of xylenes while having the acid sites on the external surface of HZSM-5 fully covered.

Original languageEnglish
Pages (from-to)37296-37301
Number of pages6
JournalRSC Advances
Volume4
Issue number70
DOIs
Publication statusPublished - 2014

Scopus Subject Areas

  • Chemistry(all)
  • Chemical Engineering(all)

Fingerprint

Dive into the research topics of 'Synthesis of HZSM-5@silicalite-1 core-shell composite and its catalytic application in the generation of p-xylene by methylation of toluene with methyl bromide'. Together they form a unique fingerprint.

Cite this