The guiding role of pre-coking on the coke deposition over ZSM-5 in methanol to propylene

Deposition of carbonaceous compounds was used to improve the propylene selectivity of ZSM-5 by deactivating some acid sites meanwhile maintaining the high activity for methanol conversion. The carbonaceous species of pre-coked samples before and after MTP reactions were investigated by elementary an...

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Autores principales: Wang, Lin, Qi, Jing, Jiao, Hongqiao, An, Liangcheng, Guan, Chong, Yong, Xiaojing, Jin, Zhengwei, Zhang, Angui, Liu, Dianhua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2019
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6774938/
https://www.ncbi.nlm.nih.gov/pubmed/31598280
http://dx.doi.org/10.1098/rsos.190218
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author Wang, Lin
Qi, Jing
Jiao, Hongqiao
An, Liangcheng
Guan, Chong
Yong, Xiaojing
Jin, Zhengwei
Zhang, Angui
Liu, Dianhua
author_facet Wang, Lin
Qi, Jing
Jiao, Hongqiao
An, Liangcheng
Guan, Chong
Yong, Xiaojing
Jin, Zhengwei
Zhang, Angui
Liu, Dianhua
author_sort Wang, Lin
collection PubMed
description Deposition of carbonaceous compounds was used to improve the propylene selectivity of ZSM-5 by deactivating some acid sites meanwhile maintaining the high activity for methanol conversion. The carbonaceous species of pre-coked samples before and after MTP reactions were investigated by elementary analysis and thermogravimetric analysis (TGA). The results showed that pre-coke formed at low temperature (250°C) was unstable and easy to transform into polyaromatics species at the high reacting temperature, while combining 5% pre-coking process with 95% steam treatment at high temperature (480°C) was effective in inhibiting the formation of coke deposits and presented a significant improvement in the propylene selectivity.
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spelling pubmed-67749382019-10-09 The guiding role of pre-coking on the coke deposition over ZSM-5 in methanol to propylene Wang, Lin Qi, Jing Jiao, Hongqiao An, Liangcheng Guan, Chong Yong, Xiaojing Jin, Zhengwei Zhang, Angui Liu, Dianhua R Soc Open Sci Chemistry Deposition of carbonaceous compounds was used to improve the propylene selectivity of ZSM-5 by deactivating some acid sites meanwhile maintaining the high activity for methanol conversion. The carbonaceous species of pre-coked samples before and after MTP reactions were investigated by elementary analysis and thermogravimetric analysis (TGA). The results showed that pre-coke formed at low temperature (250°C) was unstable and easy to transform into polyaromatics species at the high reacting temperature, while combining 5% pre-coking process with 95% steam treatment at high temperature (480°C) was effective in inhibiting the formation of coke deposits and presented a significant improvement in the propylene selectivity. The Royal Society 2019-09-04 /pmc/articles/PMC6774938/ /pubmed/31598280 http://dx.doi.org/10.1098/rsos.190218 Text en © 2019 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Chemistry
Wang, Lin
Qi, Jing
Jiao, Hongqiao
An, Liangcheng
Guan, Chong
Yong, Xiaojing
Jin, Zhengwei
Zhang, Angui
Liu, Dianhua
The guiding role of pre-coking on the coke deposition over ZSM-5 in methanol to propylene
title The guiding role of pre-coking on the coke deposition over ZSM-5 in methanol to propylene
title_full The guiding role of pre-coking on the coke deposition over ZSM-5 in methanol to propylene
title_fullStr The guiding role of pre-coking on the coke deposition over ZSM-5 in methanol to propylene
title_full_unstemmed The guiding role of pre-coking on the coke deposition over ZSM-5 in methanol to propylene
title_short The guiding role of pre-coking on the coke deposition over ZSM-5 in methanol to propylene
title_sort guiding role of pre-coking on the coke deposition over zsm-5 in methanol to propylene
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6774938/
https://www.ncbi.nlm.nih.gov/pubmed/31598280
http://dx.doi.org/10.1098/rsos.190218
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