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Production of oil and gas through thermal and thermo-catalytic pyrolysis of waste polyethylene
Monatshefte für Chemie - Chemical Monthly ( IF 1.7 ) Pub Date : 2020-08-01 , DOI: 10.1007/s00706-020-02656-9
Z. Hussain , M. Khatak , K. M. Khan , M. Y. Naz , N. M. AbdEl-Salam , K. A. Ibrahim

Abstract

Waste polyethylene is one of the most abundant plastics coming to the municipal waste. Polyethylene releases toxic chemicals, which deteriorate the environment and human health. This study investigates the valorization of waste polyethylene through thermal and thermo-catalytic pyrolysis process. Being low cost and reusable, the ordinary Portland and white cements were used as a catalyst. The thermal, white cement catalyzed, and Portland cement catalyzed pyrolysis produced 83.16%, 90.99%, and 89.61% relative amount of oil, respectively, at optimum temperature of 500 °C. For time optimization, the pyrolysis reaction was carried out for different time intervals between 15 and 78 min. The catalyst weight of 30% was found best option for increasing the hydrocarbon yield and cutting down the reaction time and is deemed as ensuring the economic disposal of the waste polyethylene. The oil product was broken down into fractions with boiling points comparable to gasoline, kerosene, and diesel and some residual fraction. The gaseous product was analyzed through different chemical analysis and combustibility tests. The oil product was analyzed using FT-IR and GC–MS techniques. It was observed that the oil product is composed of alkane and alkenes. The oil products of catalytic and thermal processes exhibited different chemical compositions. The number of compounds and their nature varied with a change in pyrolysis approach.

Graphic abstract



中文翻译:

通过废聚乙烯的热和热催化热解生产石油和天然气

摘要

聚乙烯废料是进入城市垃圾的最丰富的塑料之一。聚乙烯会释放有毒化学物质,从而破坏环境和人类健康。本研究通过热催化和热催化热解工艺研究了废聚乙烯的增值。低成本和可重复使用的普通波特兰水泥和白水泥被用作催化剂。在最佳温度500°C下,热,白水泥催化和波特兰水泥催化的热解分别产生了83.16%,90.99%和89.61%的相对油量。为了优化时间,热解反应的时间间隔为15至78分钟。发现催化剂重量为30%是增加烃收率和减少反应时间的最佳选择,并且被认为确保了废弃聚乙烯的经济处置。油产品被分解成沸点与汽油,煤油和柴油相当的馏分和一些残留馏分。通过不同的化学分析和可燃性测试来分析气态产物。使用FT-IR和GC-MS技术分析了石油产品。观察到油产物由烷烃和烯烃组成。催化和热过程的油品显示出不同的化学组成。化合物的数量及其性质随热解方法的变化而变化。油产品被分解成沸点与汽油,煤油和柴油相当的馏分和一些残留馏分。通过不同的化学分析和可燃性测试来分析气态产物。使用FT-IR和GC-MS技术分析了石油产品。观察到油产物由烷烃和烯烃组成。催化和热过程的油品显示出不同的化学组成。化合物的数量及其性质随热解方法的变化而变化。油产品被分解成沸点与汽油,煤油和柴油相当的馏分和一些残留馏分。通过不同的化学分析和可燃性测试来分析气态产物。使用FT-IR和GC-MS技术分析了石油产品。观察到油产物由烷烃和烯烃组成。催化和热过程的油品显示出不同的化学组成。化合物的数量及其性质随热解方法的变化而变化。催化和热过程的油品显示出不同的化学组成。化合物的数量及其性质随热解方法的变化而变化。催化和热过程的油品显示出不同的化学组成。化合物的数量及其性质随热解方法的变化而变化。

图形摘要

更新日期:2020-08-01
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