各种沸石催化剂上生物乙醇转化为丙烯：反应优化与催化剂失活

Bioethanol Conversion into Propylene over Various Zeolite Catalysts: Reaction Optimization and Catalyst Deactivation.

作者信息

Xia Wei, Ma Chao, Huang Yaxin, Li Shuangshuang, Wang Xue, Chen Kun, Liu Dong

机构信息

State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Huangdao District, Qingdao 266580, China.

出版信息

Nanomaterials (Basel). 2022 Aug 10;12(16):2746. doi: 10.3390/nano12162746.

DOI:10.3390/nano12162746

PMID:36014611

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9414363/

Abstract

Catalytic conversions of bioethanol to propylene were investigated over different zeolite catalysts. H-ZSM-5 (SiO/AlO = 80) was found to be the most effective for propylene production. Furthermore, H-ZSM-5 (SiO/AlO = 80) was investigated under different variables of catalytic reaction (calcination temperature, feed composition, reaction temperature, and time on stream) for the conversion of ethanol to propylene. The H-ZSM-5(80) catalysts calcined at 600 °C showed the highest propylene yield. The moderate acidic site on ZSM-5 is required for the production of propylene. The activity on ZSM-5 is independent of the ethanol feed composition. H-ZSM-5 catalyst deactivation was observed, owing to dealumination. The highest propylene yield was 23.4% obtained over HZSM-5(80). Propylene, butene, and ≥C5 olefins were formed by parallel reaction from ethylene. Olefins were converted to each paraffin by sequential hydrogenation reaction. HZSM-5(80) catalyst is a promising catalyst not only for ethanol but also for the conversion of bioethanol to light olefins.

摘要

研究了不同沸石催化剂上生物乙醇向丙烯的催化转化。发现H-ZSM-5（SiO/AlO = 80）对丙烯生产最为有效。此外，研究了H-ZSM-5（SiO/AlO = 80）在催化反应的不同变量（煅烧温度、进料组成、反应温度和反应时间）下乙醇向丙烯的转化。在600℃煅烧的H-ZSM-5(80)催化剂显示出最高的丙烯产率。ZSM-5上适度的酸性位点是生产丙烯所必需的。ZSM-5上的活性与乙醇进料组成无关。由于脱铝，观察到H-ZSM-5催化剂失活。在HZSM-5(80)上获得的最高丙烯产率为23.4%。丙烯、丁烯和≥C5烯烃由乙烯通过平行反应形成。烯烃通过顺序加氢反应转化为各链烷烃。HZSM-5(80)催化剂不仅对乙醇而且对生物乙醇转化为轻质烯烃都是一种有前景的催化剂。