Flexible regulation of C3=/C2= ratio in methanol-to-hydrocarbons by delicate control of acidity of ZSM-5 catalyst

Shu Fang Zhao; Xu Ting Yao; Bing Hui Yan; Li Li; Yue Ming Liu; Ming Yuan He

doi:10.1016/j.cclet.2017.03.023

Flexible regulation of C₃⁼/C₂⁼ ratio in methanol-to-hydrocarbons by delicate control of acidity of ZSM-5 catalyst

Shu Fang Zhao, Xu Ting Yao, Bing Hui Yan, Li Li, Yue Ming Liu, Ming Yuan He

School of Chemistry and Molecular Engineering

East China Normal University

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

A very wide range of the C₃⁼/C₂⁼ ratio from 0.72 to 7.56 with high C₂⁼ + C₃⁼ selectivity of around 66% in the methanol-to-hydrocarbons process can be realized over ZSM-5 catalyst in a fixed-bed reactor. We firstly conduct a single factor experiment of acidity, demonstrating that the acidity control of MTH catalyst is crucial to adjusting light olefins selectivity. Weak Brønsted acid sites favor to high C₃⁼ selectivity (59.0%) due to the suppression of the conversion reactions from the alkene-based to arene-based cycle, while Lewis acid sites conduce to high C₂⁼ selectivity (39.6%) due to the promotion of the conversion reactions for the aromatics formation and steric constraints of Lewis acid sites making the aromatics crack more efficiently to C₂⁼.

Original language	English
Pages (from-to)	1318-1323
Number of pages	6
Journal	Chinese Chemical Letters
Volume	28
Issue number	6
DOIs	https://doi.org/10.1016/j.cclet.2017.03.023
State	Published - Jun 2017

Keywords

Acidity
Lewis acidity
Methanol-to-hydrocarbons
Olefins
Zeolites

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10.1016/j.cclet.2017.03.023

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title = "Flexible regulation of C3=/C2= ratio in methanol-to-hydrocarbons by delicate control of acidity of ZSM-5 catalyst",

abstract = "A very wide range of the C3=/C2= ratio from 0.72 to 7.56 with high C2= + C3= selectivity of around 66\% in the methanol-to-hydrocarbons process can be realized over ZSM-5 catalyst in a fixed-bed reactor. We firstly conduct a single factor experiment of acidity, demonstrating that the acidity control of MTH catalyst is crucial to adjusting light olefins selectivity. Weak Br{\o}nsted acid sites favor to high C3= selectivity (59.0\%) due to the suppression of the conversion reactions from the alkene-based to arene-based cycle, while Lewis acid sites conduce to high C2= selectivity (39.6\%) due to the promotion of the conversion reactions for the aromatics formation and steric constraints of Lewis acid sites making the aromatics crack more efficiently to C2=.",

keywords = "Acidity, Lewis acidity, Methanol-to-hydrocarbons, Olefins, Zeolites",

author = "Zhao, \{Shu Fang\} and Yao, \{Xu Ting\} and Yan, \{Bing Hui\} and Li Li and Liu, \{Yue Ming\} and He, \{Ming Yuan\}",

note = "Publisher Copyright: {\textcopyright} 2017",

year = "2017",

month = jun,

doi = "10.1016/j.cclet.2017.03.023",

language = "英语",

volume = "28",

pages = "1318--1323",

journal = "Chinese Chemical Letters",

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T1 - Flexible regulation of C3=/C2= ratio in methanol-to-hydrocarbons by delicate control of acidity of ZSM-5 catalyst

AU - Zhao, Shu Fang

AU - Yao, Xu Ting

AU - Yan, Bing Hui

AU - Li, Li

AU - Liu, Yue Ming

AU - He, Ming Yuan

PY - 2017/6

Y1 - 2017/6

N2 - A very wide range of the C3=/C2= ratio from 0.72 to 7.56 with high C2= + C3= selectivity of around 66% in the methanol-to-hydrocarbons process can be realized over ZSM-5 catalyst in a fixed-bed reactor. We firstly conduct a single factor experiment of acidity, demonstrating that the acidity control of MTH catalyst is crucial to adjusting light olefins selectivity. Weak Brønsted acid sites favor to high C3= selectivity (59.0%) due to the suppression of the conversion reactions from the alkene-based to arene-based cycle, while Lewis acid sites conduce to high C2= selectivity (39.6%) due to the promotion of the conversion reactions for the aromatics formation and steric constraints of Lewis acid sites making the aromatics crack more efficiently to C2=.

AB - A very wide range of the C3=/C2= ratio from 0.72 to 7.56 with high C2= + C3= selectivity of around 66% in the methanol-to-hydrocarbons process can be realized over ZSM-5 catalyst in a fixed-bed reactor. We firstly conduct a single factor experiment of acidity, demonstrating that the acidity control of MTH catalyst is crucial to adjusting light olefins selectivity. Weak Brønsted acid sites favor to high C3= selectivity (59.0%) due to the suppression of the conversion reactions from the alkene-based to arene-based cycle, while Lewis acid sites conduce to high C2= selectivity (39.6%) due to the promotion of the conversion reactions for the aromatics formation and steric constraints of Lewis acid sites making the aromatics crack more efficiently to C2=.

KW - Acidity

KW - Lewis acidity

KW - Methanol-to-hydrocarbons

KW - Olefins

KW - Zeolites

UR - https://www.scopus.com/pages/publications/85017441087

U2 - 10.1016/j.cclet.2017.03.023

DO - 10.1016/j.cclet.2017.03.023

M3 - 文章

AN - SCOPUS:85017441087

SN - 1001-8417

VL - 28

SP - 1318

EP - 1323

JO - Chinese Chemical Letters

JF - Chinese Chemical Letters

IS - 6

ER -

Flexible regulation of C₃⁼/C₂⁼ ratio in methanol-to-hydrocarbons by delicate control of acidity of ZSM-5 catalyst

Abstract

Keywords

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