文献类型：期刊文献

英文题名：Two-step coupled methanolysis and hydrogenation process for upcycling waste PET into high-value 1,4-cyclohexanedicarboxylate

作者：Wei, Xin[1];Sun, Weixiao[1];Wang, Xiashi[1];Zhang, Jing[1,2];Sun, Weizhen[1];Xi, Zhenhao[1];Liu, Pingwei[3];Zhao, Ling[1,2];Zheng, Weizhong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn & Low carbon Technol, Shanghai 200237, Peoples R China;[2]Guangxi Lab Low Carbon Technol & Green Chem Adv Ma, Qinzhou, Guangxi, Peoples R China;[3]Zhejiang Univ, Coll Chem & Biol Engn, State Key Lab Chem Engn & Low Carbon Technol, Hangzhou, Zhejiang, Peoples R China

年份：2026

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20261320358346);WOS:【SCI-EXPANDED(收录号:WOS:001721696600001)】；

基金：This work was financially supported by the National Natural Science Foundation of China under Grant (22293064), the Guangxi Science and Technology Innovation Platform Program ("Leitai" Action Plan-Guangxi Laboratory Capacity Building) (LT2504240028), and the National Natural Science Foundation of China under Grant (22293061).

语种：英文

外文关键词：deep eutectic solvent; DMCD; DMT hydrogenation; two-step coupled process; waste PET methanolysis

摘要：Waste polyethylene terephthalate (PET) methanolysis into dimethyl terephthalate (DMT) is a promising route for industrial application but still faces harsh methanolysis conditions and low economic effectiveness. Herein, we proposed a strategy for the upcycling waste PET into the high-value dimethyl 1,4-cyclohexanedicarboxylate (DMCD) via two-step coupled PET methanolysis and DMT hydrogenation at mild reaction conditions. density functional theory-based various quantum chemical descriptors of deep eutectic solvents and corresponding DMT yields were correlated using machine learning algorithms, and found that metal-free 1,5-diazabicyclo[4.3.0]non-5-ene/4-methylimidazole possesses the best catalytic performance for PET methanolysis with DMT and ethylene glycol yields reaching 95% and 89%, respectively, under mild conditions, and exhibits good applicability to various real waste PET and other polyesters. The novel Ru/Al2O3 catalyst for resultant DMT hydrogenation was developed to yield 99.1% DMCD at 160 degrees C, 4 MPa H2 with superb catalytic activity and stability. This work provides a two-step integrated upcycling route for waste PET.