Synergistic catalysis for promoting selective C–C/C–O cleavage in plastic waste: structure–activity relationship and rational design of heterogeneous catalysts for liquid hydrocarbon production†

IF 4.3 2区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Arjun K. Manal , Atal Shivhare , Sharad Lande , Rajendra Srivastava
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Abstract

Ever-increasing consumption of plastic products and poor waste management infrastructure have resulted in a massive accumulation of plastic waste in environments, causing adverse effects on climate and living organisms. Although contributing ∼10% towards the total plastic waste management infrastructure, the chemical recycling of plastic waste is considered a viable option to valorize plastic waste into platform chemicals and liquid fuels. Among the various chemical upcycling processes, catalytic hydroprocessing has attracted interest due to its potential to offer higher selectivity than other thermal-based approaches. Heterogeneous catalytic hydroprocessing reactions offer routes for converting plastic waste into essential industrially important molecules. However, the functional group similarities in the plastic polymers frequently constrain reaction selectivity. Therefore, a fundamental understanding of metal selection for targeted bond activation and plastic interaction on solid surfaces is essential for catalyst design and reaction engineering. In this review, we critically assess the structure–activity relationship of catalysts used in the hydroprocessing of plastic waste for the selective production of liquid hydrocarbons. We discuss the significance of C–C/C–O bond activation in plastic waste through active site modulation and surface modification to elucidate reaction networks and pathways for achieving selective bond activation and cleavage. Finally, we highlight current challenges and future opportunities in catalyst design to upcycle real-life plastic waste and produce selective liquid hydrocarbons.

Abstract Image

促进塑料废弃物中选择性 C-C/C-O 裂解的协同催化:用于液态烃生产的结构-活性关系和异相催化剂的合理设计
塑料产品消费量的不断增加和废物管理基础设施的落后导致塑料废物在环境中大量积累,对气候和生物造成了不利影响。虽然塑料废弃物占整个塑料废弃物管理基础设施的 10%,但塑料废弃物的化学回收利用被认为是将塑料废弃物转化为平台化学品和液体燃料的可行选择。在各种化学回收工艺中,催化水处理法因其具有比其他热法更高的选择性而备受关注。异相催化加氢处理反应提供了将塑料废弃物转化为重要工业分子的途径。然而,塑料聚合物中官能团的相似性经常会限制反应的选择性。因此,对于催化剂设计和反应工程而言,从根本上了解金属选择的目标键活化和塑料在固体表面的相互作用至关重要。在本综述中,我们对用于塑料废料加氢处理以选择性生产液态烃的催化剂的结构-活性关系进行了严格评估。我们讨论了通过活性位点调节和表面改性激活塑料废物中 C-C/C-O 键的意义,以阐明实现选择性键激活和裂解的反应网络和途径。最后,我们强调了在催化剂设计方面当前面临的挑战和未来的机遇,以便对现实生活中的塑料废弃物进行再循环并生产选择性液态烃。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Chemical Communications
Chemical Communications 化学-化学综合
CiteScore
8.60
自引率
4.10%
发文量
2705
审稿时长
1.4 months
期刊介绍: ChemComm (Chemical Communications) is renowned as the fastest publisher of articles providing information on new avenues of research, drawn from all the world''s major areas of chemical research.
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