文献类型：期刊文献

英文题名：H2-free Plastic Conversion: Converting PET back to BTX by Unlocking Hidden Hydrogen

作者：Lu, Shenglu[1];Jing, Yaxuan[1];Feng, Bo[1];Guo, Yong[1];Liu, Xiaohui[1];Wang, Yanqin[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem & Res, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China

年份：2021

卷号：14

期号：19

起止页码：4242

外文期刊名：CHEMSUSCHEM

收录：;EI(收录号：20211110077633);WOS:【SCI-EXPANDED(收录号:WOS:000627857700001)】；

基金：This work was supported financially by the NSFC of China (21832002, 22072041, 21872050, and 21808063), the Fundamental Research Funds for the Central Universities (222201718003) and the Science and Technology Commission of Shanghai Municipality (10dz2220500).

语种：英文

外文关键词：Hydrogenolysis - Ethylene - Plastic bottles - Ruthenium - Hydrogen - Polyols - Ethylene glycol - Carboxylation - Hydrolysis

摘要：The strong desire for a circular economy makes obtaining fuels and chemicals via plastic degradation an important research topic in the 21st century. Here, the first example of the H-2-free polyethylene terephthalate (PET) conversion to BTX (benzene, toluene and xylene) was achieved by unlocking hidden hydrogen in the ethylene glycol part over Ru/Nb2O5 catalyst. Among the whole process (hydrolysis, reforming and hydrogenolysis/decarboxylation), the parallel hydrogenolysis and decarboxylation were competing and the rate-determining step. Ru/Nb2O5 exhibited superior hydrogenolysis and poorer decarboxylation performance in direct comparison with Ru/NiAl2O4, accordingly contributing to the distinct selectivity to alkyl aromatics among BTX. Ru species on Nb2O5, unlike those on NiAl2O4, showed more Ru delta+ species owing to the strong interaction between Ru and Nb2O5, restricting the undesired decarboxylation. Along with NbOx species for C-O bond activation, excellent reactivity towards the H-2-free conversion of PET back to BTX with alkyl aromatics as dominant species was achieved. This H-2-free system was also capable of converting common real PET plastics back to BTX, adding new options in the circular economy of PET.