中国塑料 ›› 2021, Vol. 35 ›› Issue (8): 64-76.DOI: 10.19491/j.issn.1001-9278.2021.08.009

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中国石化废旧塑料化学回收与化学循环技术探索

李明丰1(), 蔡志强2, 邹亮1, 魏晓丽1, 习远兵1, 王国清3, 蔡立乐1, 张哲民1, 夏国富1, 蒋海滨3   

  1. 1.中国石油化工股份有限公司石油化工科学研究院,北京 100083
    2.中国石油化工股份有限公司化工事业部,北京 100022
    3.中国石油化工股份有限公司北京化工研究院,北京 100000
  • 收稿日期:2021-04-07 出版日期:2021-08-26 发布日期:2021-08-27

Exploration on Chemical Recovery Technology of Plastic Wastes in Sinopec

LI Mingfeng1(), CAI Zhiqiang2, ZOU Liang1, WEI Xiaoli1, XI Yuanbing1, WANG Guoqing3, CAI Lile1, ZHANG Zhemin1, XIA Guofu1, JIANG Haibin3   

  1. 1.Research Institute of Petroleum Processing,Sinopec Corporation,Beijing 100083,China
    2.Strategic Business Unit of Petrochemicals,Sinopec Corporation,Beijing 100728,China
    3.Beijing Research Institute of Chemical Industry,Sinopec Corporation,Beijing 100000,China
  • Received:2021-04-07 Online:2021-08-26 Published:2021-08-27
  • Contact: LI Mingfeng E-mail:limf.ripp@sinopec.com

摘要:

废旧塑料化学回收是实现塑料资源可持续发展的技术之一,特别是废旧塑料热解技术备受关注。中国石油化工股份有限公司(简称:中国石化)结合自身优势,对废旧塑料化学回收及化学循环技术进行了全面设计规划,开发了几种不同途径的化学回收及化学循环技术。其中,废旧塑料生产低杂质油品(SPWO)技术,通过物理法脱杂、溶剂热解的有机耦合实现了最大量生产低杂质油品的目的,为废旧塑料的全循环利用奠定了基础;开发了废旧塑料微波辅助热解技术,可实现一步法制备低碳烯烃。废旧塑料热解油加氢生产柴油调和组分技术所得柴油馏分十六烷值可达到61.2;所开发的催化裂化技术生产汽油时,汽油产率可达50 %,而同时生产汽油和低碳烯烃产品时,汽油收率可达30 %,乙烯和丙烯产率总产率18 %以上;设计开发了废旧塑料热解油加氢?蒸汽裂解制备烯烃技术,经深度加氢预处理耦合蒸汽裂解处理后,三烯收率可达41.9 %。对不同的废旧塑料化学回收技术路线进行碳足迹分析并与石油基炼厂及废旧塑料焚烧发电技术的碳排放进行对比,废旧塑料化学回收技术具有良好的碳减排竞争力。

关键词: 废旧塑料, 化学回收, 热解油加工, 碳足迹分析

Abstract:

The chemical recycling of waste plastics is considered to be the only technology that can realize the sustainable development of plastic resources. In particular, the pyrolysis technology has attracted a great deal of attention. Based on the own superiority, Sinopec has carried out a comprehensive design and developed several different methods for the chemical recycling of plastic wastes. A novel technology of Sinopec plastic wastes was developed to produce the low impurity oil (SPWO) through the physical removal of impurities coupling with solvent pyrolysis. It achieved the goal of maximizing the production of low?impurity oils, building up a good basis for the full recycling of waste plastics. A microwave?assisted pyrolysis technology of plastic wastes was developed to produce olefins in one step. The cetane number reached 61.2 for the diesel fraction obtained from the hydrogenation of plastic wastes pyrolysis oil. The gasoline yield reached 50 % when using the catalytic cracking technology to produce gasoline. The gasoline yield reached 30 % and the total yield of ethylene and propylene reached 18 % when using the catalytic cracking technology to produce gasoline and olefin. The hydrogenation?steam cracking technology of plastic wastes pyrolysis oil for olefins was designed and developed, and the olefin (ethylene, propylene and butadiene) yield reached 41.9 %. The carbon footprint analysis of chemical recycling technology routes for different plastic wastes was carried out. Compared to the carbon emissions of the petroleum?based refineries and incineration for power generation technology, the chemical recycling of plastic wastes exhibits good carbon reduction competitiveness.

Key words: plastic wastes, chemical recycling, pyrolysis oil processing, carbon footprint analysis

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