Parameter selection for the hydroconversion of waste polyethylene plastic under mild conditions: A comprehensive evaluation  

作　　者：CHENG LeiLei CHEN RuiZhe ZHU WeiQiang TIAN ShaoNan GU Jing YUAN HaoRan CHEN Yong 

机构地区：[1]Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China [2]School of Energy Science and Engineering,University of Science and Technology of China,Hefei 230026,China [3]Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Science China(Technological Sciences)》2024年第8期2413-2426,共14页中国科学（技术科学英文版）

基　　金：supported by the CAS Project for Young Scientists in Basic Research (Grant No. YSBR-044)。

摘　　要：The hydrogenolysis/hydrocracking of waste polyethylene(PE) has recently been intensively studied, with the general pursuit of low-temperature reaction conditions, increased oil-phase yield, and narrower carbon chain distribution. Before this, we utilized a ball-milled ZSM-22 catalyst loaded with Ru nanoparticles(NPs), which exhibited excellent hydroconversion performance. It deconstructed PE into >80 wt.% oil products under low temperatures and short reaction times. Herein, we investigated the influence of varying temperature/pressure parameters on the degree of specific hydrocracking/internal hydrogenolysis/terminal hydrogenolysis reactions. From the comprehensive energy efficiency perspective, including stirring, reaction, and product separation, as well as taking into account the degree of product isomerization and catalyst lifespan, we analyzed the optimization of parameters. This research abandons the notion that lower temperatures are better and proposes a more comprehensive evaluation framework for low-consumption hydroconversion of PE to produce high-value products.

关 键 词：plastic upcycling POLYETHYLENE HYDROCRACKING HYDROGENOLYSIS comprehensive energy efficiency 

分 类 号：X705[环境科学与工程—环境工程] O643.36[理学—物理化学]