由基UiO-66金属有机框架催化的聚烯的 Pyrolytic 脱聚合
Jerry Zhi Xiong Heng1, Tristan Tsai Yuan Tan1, Xin Li1
1Laboratory for Green Porous Materials, Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore, 138634, Republic of Singapore.
Angewandte Chemie (International ed. in English)
|August 1, 2024
概括
金属有机框架 (MOFs) 催化了聚烯的热解,将塑料废物转化为有价值的石化制品. 这种新的方法提高了碳化合物产量,减少了固体废物,克服了塑料回收的先前限制.
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.
- 聚合物化学 聚合物化学
背景情况:
- 聚烯,包括聚乙烯和聚烯,是主要的塑料废物流.
- 它们的化学惰性使得它们难以回收成有价值的产品.
- 热解提供了一种可扩展的方法,用于将混合,受污染的塑料转化为石化产品.
研究的目的:
- 为了研究金属有机框架 (MOFs) 作为催化剂的有效性,通过热解脱聚烯脱聚合.
- 为了解决MOFs的局限性,例如热不稳定性和孔隙可访问性,在多烯转换中.
- 证明MOFs在提高碳化合物产量和减少塑料回收中的废物方面的潜力.
主要方法:
- 使用UiO-66 MOFs与协调不和的基节点作为聚烯酸溶解的催化剂.
- 在 pyrolytic 温度下,聚烯的透到 MOF 毛孔的特征.
- 分析了由此产生的碳化合物产品和残留固体.
主要成果:
- UiO-66 MOFs显著提高了来自聚烯烯热解的液体和气体碳化合物的产量.
- 与非催化热解相比,残留固体废物的数量减少了一半.
- 在UiO-66孔中展示了明确的聚烯烯透,使MOF结构内的C-C键裂变成为可能.
- 实现了与热酸催化反应不同的酸碳化合物产品分布.
结论:
- UiO-66 MOFs是聚烯的有效异质催化剂,为塑料废物利用提供了一个有前途的途径.
- 催化活性源于在MOF孔内可访问的易斯酸Zr-oxo节点.
- MOFs代表了一个高度可设计的催化剂类别,可以补充现有的塑料去聚合技术.
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