Understanding the important variables to optimize glycolysis of polyethylene terephthalate with lanthanide-containing ionic liquids
Understanding the important variables to optimize glycolysis of polyethylene terephthalate with lanthanide-containing ionic liquids
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了解用含镧系离子液体优化聚对苯二甲酸乙二醇酯糖酵解的重要变量
DOI：
10.1039/d3su00090g
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Fieser, Megan E.
中科院分区：
文献类型：
--
作者：
Bush, Nancy G.;Dinh, Caitlin H.;Catterton, Casandrah L.;Fieser, Megan E.
醇解是一种广泛研究的聚对苯二甲酸乙二醇酯（PET）化学回收方法。含金属离子液体（MIL）是PET糖酵解的有吸引力的催化剂，因为它们已被证明具有高稳定性并且可以容易地回收。虽然已经用不同的阳离子和含金属的阴离子研究了一系列MIL，但是对于MIL催化剂设计中的不同变量以及它们如何影响PET的糖酵解没有结论性的趋势。我们报告了使用镧系元素MIL来确定哪些催化剂设计变量和反应条件可以被调整以在PET的解构中产生最大的差异。发现离子液体（IL）与镧系金属盐的混合物导致对PET的糖酵解具有活性的均相MIL催化剂。这些研究表明，发现导致协同MIL催化剂的金属盐和IL组合比IL或金属盐阴离子本身的碱性更重要。最后，具有高IL与金属盐比率的MIL的高性能降低了具有供应风险的金属盐的负载，同时保持了MIL相对于无金属IL催化剂的价值。
Glycolysis is a widely studied method for chemical recycling of polyethylene terephthalate (PET). Metal-containing ionic liquids (MILs) are attractive catalysts for the glycolysis of PET, as they have been shown to have high stability and can be easily recycled. While a range of MILs have been studied with varying cations and metal containing anions, there are no conclusive trends for the different variables in MIL catalyst design and how they affect glycolysis of PET. We report the use of lanthanide MILs to identify which catalyst design variables and reaction conditions can be tuned to make the biggest difference in the deconstruction of PET. Mixtures of ionic liquids (ILs) with lanthanide metal salts were found to lead to homogeneous MIL catalysts that are active for the glycolysis of PET. These studies identified that finding a metal salt and IL combination that leads to a cooperative MIL catalyst was more important than the basicity of the IL or metal salt anion itself. Finally, the high performance of MILs with a high ratio of IL to metal salt lowers the loading of metal salts with supply risk, while maintaining the value of MIL over metal-free IL catalysts.
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