While there are significant economic benefits associated with plastic recycling, the practical options for treating plastic waste remain relatively limited. This study introduces a novel bimetallic MOF-derived catalyst designed specifically for upcycling polycarbonate plastic into cycloalkanes within jet fuel range. By incorporating dual metals (MoCo) onto the MOF framework, the catalyst creates single metal sites and constructs heterojunctions. Characterizations revealed that the bifunctional catalyst can chemically adsorb phenolic compounds on a highly synergistic heterogeneous surface and lower the energy barrier of hydrodeoxygenation. Integrating the catalyst into a tandem reactor facilitates the conversion of PC plastics into jet-fuels. Achieving an average cycloalkane yield of 84.5% underscores the catalyst’s potential for deep hydrodeoxygenation of actual plastic waste. Furthermore, using waste CDs as feedstock, the cycloalkanes yield remains consistent even after three regeneration cycles, demonstrating the catalyst’s stability. In the low-carbon future, this high hydrodeoxygenation performance catalyst can be applied in chemical upcycling for pursuing a circular plastic economy.
Liuqun Gu,Meifeng Wang,Hui Li,Kai Ni Teh,Yiqun Li,Ye Liu
A new type of modified lignin, lignin-p-Boc, was obtained through reaction with di- tert -butyl dicarbonate (Boc 2 O) in aqueous media catalyzed by 4-dimethylaminopyridine (DMAP). Boc modification occurred regardless of type of lignin, was tunable, and proceeded well in recovering lignin at high purity from sodium lignosulfonate (a common byproduct from pulping industry; lignin content: 60%). Lignin-p-BOC was demonstrated as a potential reactive filler in green plastic and as a potential crosslinker in design of bioresorbable composite polymeric implants. Furthermore, the effect of the modification on breakdown rate of alkali lignin by microbes was investigated, and results showed that the modification substantially decreases the breakdown rate. The tunable Boc modification process was designed via a system thinking, including availability of raw lignin, economical/green modification, potentiality of drop-in-change to current thermoplastic processing, modification impact on microbial degradability/disposed environment at the end of use life; hence the holistic consideration makes this alternative method for upgrade of technical lignins very practical for future industrial application. Via “ in-situ ” forming “easily breakable covalent bonds” with existing thermopolymers inside, Lignin-p-BOCs are also promising to play an important role as both excellent binders via “random match” and reductants in transforming linear plastic waste into circular plastics.
危险品化学品经营许可证（带存储）