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

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外文摘要：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.

外文关键词：

waste plasticspolyolefinschemical recyclingpyrolysisalternative fuelswaste-to-energy

作者：

Ecrin Ekici、Güray Yildiz、Magdalena Joka Yildiz、Monika Kalinowska、Erol ?eker、Jiawei Wang

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作者单位：

Karlsruhe Institute of Technology,Institute of Catalysis Research and Technology,Eggenstein-Leopoldshafen 76344,Germany

Izmir Institute of Technology,Faculty of Engineering,Department of Energy Systems Engineering,Izmir 35430,Türkiye

Department of Materials Engineering and Production,Faculty of Mechanical Engineering,Bialystok University of Technology,Bialystok 15-351,Poland

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

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

Izmir Institute of Technology,Faculty of Engineering,Department of Chemical Engineering,Izmir 35430,Türkiye

Energy and Bioproducts Research Institute(EBRI),Aston University,Birmingham B4 7ET,United Kingdom

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基金：

an Institutional LinksUK Department for Business,Energy and Industrial Strategy together with the Scientific and Technological Research Council of

项目编号：

527641843119N302

出版年：

2024

DOI：

10.1007/s11705-024-2429-x

化学科学与工程前沿

高等教育出版社

化学科学与工程前沿

CSTPCDEI

影响因子：0.172

ISSN：2095-0179

年,卷(期)：2024.18(6)