物理吸附
催化作用
沸石
聚丙烯
催化裂化
材料科学
布朗斯特德-洛瑞酸碱理论
化学工程
路易斯酸
化学吸附
聚丙烯乙二醇
化学
无机化学
有机化学
聚乙二醇
复合材料
工程类
作者
Kanan Shikhaliyev,Thossaporn Onsree,Andrew H. Jaeschke,Seyed Majid Ghoreishian,Kaveh Shariati,Abraham Martinez,Alexander Katz,Son‐Jong Hwang,Jagoda Urban-Klaehn,Jagoda Urban-Klaehn,Jochen A. Lauterbach
标识
DOI:10.1016/j.apcatb.2023.122991
摘要
Without effective management, the steady increase of waste plastics threatens environmental well-being and ecological balance. Plastic up/recycling is a promising solution but has many challenges. In this work, catalytic cracking of polypropylene glycol (PPG) was investigated at varying reaction temperatures of 350–550 °C under nitrogen and steam, using H-ZSM-5 zeolites with different silica-to-alumina (SiO2/Al2O3) ratios of 23:1 and 50:1. The catalysts were assessed through physisorption, chemisorption, solid-state magic-angle spinning nuclear magnetic resonance spectrometry, thermogravimetry, electron microscopy, and positron annihilation lifetime spectroscopy. Extra framework aluminum and Lewis-to-Bronsted acid site ratios were found to play a significant role in the selectivity towards propionaldehyde, where values ∼ 80 % could be reached. In addition, a possible pathway for the PPG cracking reaction was proposed, which may lead to a better understanding of PPG and waste plastic decomposition via zeolite-based catalysts.
科研通智能强力驱动
Strongly Powered by AbleSci AI