文献类型：期刊文献

英文题名：Effect of boron on ZSM-5 catalyst for methanol to propylene conversion

作者：Xu, Aina[1];Ma, Hongfang[1];Zhang, Haitao[1];Ying, Weiyong[1];Fang, Dingye[1]

机构：[1]E China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, Minist Educ, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2013

卷号：15

期号：4

起止页码：95

外文期刊名：POLISH JOURNAL OF CHEMICAL TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000329572500018)】；

基金：We are grateful to the financial support for the National Key Technology Program of China (No. 2006 BAE02 B02).

语种：英文

外文关键词：methanol to propylene; ZSM-5; boron modification; propylene

摘要：B-ZSM-5 catalysts were prepared by various modification methods with boric acid, including ion-exchange, impregnation and direct synthesis. The catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), NH3-Temperature Programmed Desorption (NH3-TPD), N-2 adsorption-desorption, Fourier Transform Infrared spectrometry (FT-IR), Al-27 and B-11 MAS NMR spectra. The results revealed that the weak acidity of catalysts was significantly increased by modification. The catalytic activity was measured in a fixed bed at 460 degrees C for methanol to propylene (MTP) reaction. The results of MTP reaction showed a great increment of the propylene selectivity for the boron modified samples, especially for the directly synthesized B-ZSM-5 which also displayed high activity and selectivity towards (C2-C4=)-C-= olefins. It was found that the remarkable selectivity strongly depended on the intensity of weak acidity.