文献类型：期刊文献

英文题名：Catalytic reforming of polyethylene pyrolysis vapors to naphtha range hydrocarbons with low aromatic content over a high silica ZSM-5 zeolite

作者：Dai, Leilei[1,2,3];Zhou, Nan[1,2];Lv, Yuancai[1,2];Cobb, Kirk[1,2];Chen, Paul[1,2];Wang, Yunpu[3];Liu, Yuhuan[3];Zou, Rongge[5];Lei, Hanwu[5];Mohamed, Badr A.[6];Ruan, Roger[1,2];Cheng, Yanling[1,2,4]

第一作者：Dai, Leilei

通讯作者：Ruan, R[1];Cheng, YL[1];Cheng, YL[2]

机构：[1]Univ Minnesota, Ctr Biorefining, 1390 Eckles Ave, St Paul, MN 55108 USA;[2]Univ Minnesota, Dept Bioprod & Biosyst Engn, 1390 Eckles Ave, St Paul, MN 55108 USA;[3]Nanchang Univ, Engn Res Ctr Biomass Convers, State Key Lab Food Sci & Technol, Minist Educ, Nanchang 330047, Jiangxi, Peoples R China;[4]Beijing Union Univ, Biochem Engn Coll, 18 Fatouxili 3 Area, Beijing 100023, Peoples R China;[5]Washington State Univ, Dept Biol Syst Engn, Richland, WA 99354 USA;[6]Cairo Univ, Dept Agr Engn, Giza, Egypt

第一机构：Univ Minnesota, Ctr Biorefining, 1390 Eckles Ave, St Paul, MN 55108 USA

通讯机构：[1]corresponding author), Univ Minnesota, Minneapolis, MN 55455 USA;[2]corresponding author), Beijing Union Univ, Beijing, Peoples R China.|[11417]北京联合大学;

年份：2022

卷号：847

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;EI(收录号：20223212535076);Scopus(收录号：2-s2.0-85135305246);WOS:【SCI-EXPANDED(收录号:WOS:000898939900010)】；

基金：We acknowledge the financial support from the National Natural Science Foundation of China (21766019, 21878137), The Centrally Guided Local Science Technology Special Project (20202ZDB01012), the Major Discipline Academic and Technical Leaders Training Program of Jiangxi Province (20204BCJ23011), China Scholarship Council (CSC), Xcel Energy, Resynergi, the University of Minnesota MnDrive Environment Program MNE12, and the University of Minnesota Center for Biorefining. Parts of this work were carried out in the Characterization Facility, University of Minnesota, which receives partial support from NSF through the MRSEC program.

语种：英文

外文关键词：Waste plastic; Microwave-assisted pyrolysis; Zeolite catalysis; Low aromatic naphtha

摘要：In this study, the microwave-assisted pyrolysis coupled with ex-situ catalytic reforming of polyethylene for naphtha range hydrocarbons, with low aromatic content, was investigated. Experimental results revealed that ZSM-5 zeolites with low SiO2/Al2O3 ratios led to high aromatic selectivity, while an extremely high SiO2/Al2O3 ratio significantly re-duced the aromatic selectivity. The high selectivity of C5-C12 hydrocarbons (98.9 %) with low selectivity of C5-C12 aromatics (28.5 %) was obtained over a high silica ZSM-5 zeolite at a pyrolysis temperature of 500 degrees C, catalytic crack-ing temperature of 460 degrees C, and a weight hourly space velocity of 7 h(-1). The liquid oil produced was mainly composed of C5-C12 olefins that can be easily converted into paraffin-rich naphtha by hydrogenation or hydrogen transfer reactions as the feedstock for new plastic manufacturing. 8 cycles of regeneration-reaction cycles were carried out successfully with little change on the product distribution, showing the great potential for continuous production of low-aromatic liquid oil. Catalyst characterization showed that the catalyst deactivation was primarily caused by coke deposition (approximately 16.0 wt%) on the surface of the catalysts, and oxidative regeneration was able to recover most of the pore structure and acidity of the zeolite by effectively removing coke. This study provides a better understanding for the plastic-to-naphtha process and even for scale-up studies.