Continuous flow pyrolysis of virgin and waste polyolefins:a comparative study,process optimization and product characterization  

作　　者：Ecrin Ekici Güray Yildiz Magdalena Joka Yildiz Monika Kalinowska ErolŞeker Jiawei Wang 

机构地区：[1]Karlsruhe Institute of Technology,Institute of Catalysis Research and Technology,Eggenstein-Leopoldshafen 76344,Germany [2]Izmir Institute of Technology,Faculty of Engineering,Department of Energy Systems Engineering,Izmir 35430,Türkiye [3]Department of Materials Engineering and Production,Faculty of Mechanical Engineering,Bialystok University of Technology,Bialystok 15-351,Poland [4]Department of Agricultural and Food Engineering and Environmental Development,Institute of Civil Engineering and Energetics,Faculty of Civil Engineering and Environmental Sciences,Bialystok University of Technology,15-351 Bialystok,Poland [5]Department of Chemistry,Biology and Biotechnology,Institute of Civil Engineering and Energetics,Faculty of Civil Engineering and Environmental Sciences,Bialystok University of Technology,Bialystok 15-351,Poland [6]Izmir Institute of Technology,Faculty of Engineering,Department of Chemical Engineering,Izmir 35430,Türkiye [7]Energy and Bioproducts Research Institute(EBRI),Aston University,Birmingham B47ET,United Kingdom

出　　处：《Frontiers of Chemical Science and Engineering》2024年第6期133-149,共17页化学科学与工程前沿（英文版）

基　　金：supported by an Institutional Links (Grant No.527641843)under the Türkiye partnership;funded by the UK Department for Business,Energy and Industrial Strategy together with the Scientific and Technological Research Council of Türkiye (TÜBİTAK,Project No.119N302)and delivered by the British Council.

摘　　要：Under optimal process conditions,pyrolysis of polyolefins can yield ca.90 wt%of liquid product,i.e.,combination of light oil fraction and heavier wax.In this work,the experimental findings reported in a selected group of publications concerning the non-catalytic pyrolysis of polyolefins were collected,reviewed,and compared with the ones obtained in a continuously operated bench-scale pyrolysis reactor.Optimized process parameters were used for the pyrolysis of waste and virgin counterparts of high-density polyethylene,low-density polyethylene,polypropylene and a defined mixture of those(i.e.,25:25:50 wt%,respectively).To mitigate temperature drops and enhance heat transfer,an increased feed intake is employed to create a hot melt plastic pool.With 1.5 g·min^(-1) feed intake,1.1 L·min^(-1) nitrogen flow rate,and a moderate pyrolysis temperature of 450℃,the formation of light hydrocarbons was favored,while wax formation was limited for polypropylene-rich mixtures.Pyrolysis of virgin plastics yielded more liquid(maximum 73.3 wt%)than that of waste plastics(maximum 66 wt%).Blending polyethylenes with polypropylene favored the production of liquids and increased the formation of gasoline-range hydrocarbons.Gas products were mainly composed of C3 hydrocarbons,and no hydrogen production was detected due to moderate pyrolysis temperature.

关 键 词：waste plastics POLYOLEFINS chemical recycling PYROLYSIS alternative fuels WASTE-TO-ENERGY 

分 类 号：TE667[石油与天然气工程—油气加工工程]