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微粒级联组装到合多孔催化剂,用于废塑料的再循环利用

Jiayou Feng¹, Jindi Duan², Chin-Te Hung¹

¹Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai, 200433, China.

Angewandte Chemie (International ed. in English)

|April 22, 2024

概括

研究人员开发了一种新型的合多孔催化剂,可在低温下有效地将聚乙烯塑料废物循环升级为有价值的烯酸. 这一突破为塑料价值化和可持续化学品生产提供了有希望的解决方案.

科学领域:

材料科学材料科学材料科学
催化剂是一种催化剂.
化学工程是化学工程的重要组成部分.
聚合物化学聚合物化学

背景情况:

聚烯的催化上循环转化为高价值化学品对于塑料废弃物回收利用至关重要,但面临着重大挑战.
有效地将聚乙烯裂变为有价值的烯酸,需要具有定制结构和酸位的催化剂.

研究的目的:

合成一种新型的合多孔催化剂,用于在低温下将聚乙烯选择性催化裂变为烯酸.
增强聚烯的扩散和进入活性部位的途径,并优化并列裂解步骤.

主要方法:

一个合的多孔催化剂被合成使用一个菌级联组装策略,在ZSM-5纳米片上创建一个层次的多孔层.
催化剂具有用于聚烯吸附的宏孔,用于预裂解的中孔和用于进一步裂解的微孔.
催化剂的结构模仿生物模拟蛋白酶催化裂,以促进并联裂变并抑制焦炭形成.

主要成果:

层次性多孔催化剂有效地将聚乙烯裂变为轻碳化合物 (C1-C7),产量为443 mmol/g ZSM-5.
74.3%的产品是有价值的C3-C6烯酸,显著优于未经修改的ZSM-5和多孔催化剂.
催化剂的设计抑制了焦炭的形成,并促进了产品的逃逸,表明稳定性和效率提高.

结论:

开发的合多孔催化剂在聚乙烯上循环转化为烯酸方面表现出卓越的性能.
这种超结构设计为塑料废弃物的工业和经济利用提供了一个有前途的途径.
微粒级联组装策略为创建先进的催化材料提供了一种可行的方法.

关键词:

布式组装组件的组装.一个层次性的毛孔.半孔性二氧化是一种中孔性二氧化塑料的回收利用塑料的回收利用泽奥利特人是什么意思

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