Effect of boron on ZSM-5 catalyst for methanol to propylene conversion

Aina Xu; Hongfang Ma; Haitao Zhang; Dingye Weiyong; Dingye Fang

doi:10.2478/pjct-2013-0075

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Effect of boron on ZSM-5 catalyst for methanol to propylene conversion

Green Sciences

Volume 15 (2013): Issue 4 (December 2013)

By: Aina Xu, Hongfang Ma, Haitao Zhang, Dingye Weiyong and Dingye Fang

Open Access

|Dec 2013

Abstract

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), N2 adsorption-desorption, Fourier Transform Infrared spectrometry (FT-IR), ²⁷Al and ¹¹B 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°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 = olefins. It was found that the remarkable selectivity strongly depended on the intensity of weak acidity.

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Articles in this issue

DOI: https://doi.org/10.2478/pjct-2013-0075 | Journal eISSN: 3072-0389 (formerly 1899-4741) | Journal ISSN: 1509-8117

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Language: English

Page range: 95 - 101

Published on: Dec 31, 2013

Published by: West Pomeranian University of Technology, Szczecin

In partnership with: Paradigm Publishing Services

Publication frequency: Volume open

Keywords:

methanol to propylene,

ZSM-5,

boron modifi cation,

propylene

Related subjects:

Industrial chemistry,

Biotechnology,

Chemical engineering,

Process engineering

© 2013 Aina Xu, Hongfang Ma, Haitao Zhang, Dingye Weiyong, Dingye Fang, published by West Pomeranian University of Technology, Szczecin
This work is licensed under the Creative Commons License.

Volume 15 (2013): Issue 4 (December 2013)