文献类型：期刊文献

英文题名：Aromatic production from high-density polyethylene over zinc promoted HZSM-5

作者：Qian, Kezhen[1,2];Tian, Wenmin[1,2];Yin, Lijie[1,2];Yang, Zixu[3];Tian, Feixiang[4];Chen, Dezhen[1,2]

机构：[1]Tongji Univ, Sch Mech & Energy Engn, Shanghai 200029, Peoples R China;[2]Shanghai Engn Res Ctr Multisource Solid Wastes Cop, Shanghai 200092, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[4]Shanghai Jiao Tong Univ, Univ Michigan Shanghai Jiao Tong Univ Joint Inst, Shanghai 200240, Peoples R China

年份：2023

卷号：339

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20233414582617);WOS:【SCI-EXPANDED(收录号:WOS:001062436500001)】；

基金：This study is supported by the Ministry of Science and Technology of China, The National Key Research and Development Program of China, [Grant No. 2020YFC1910100] ; National Natural Science Foundation of China [Grant No. 52106266] ; National Higher-education Institution General Research and Development Project [Grant No. 22120210538] ; and Natural Science Foundation of Shanghai [Grant No. 22ZR1465900] .

语种：英文

外文关键词：HDPE; Zn promoted HZSM-5; Catalytic pyrolysis; Aromatics

摘要：The nature of Zn species and their roles in catalytic cracking of high-density polyethylene (HDPE) thermal decomposing vapor over Zn-promoted HZSM-5 (Zn/Z5) for aromatics were investigated. The Zn/Z5 zeolites were prepared using ion exchange and impregnation methods followed by H2 reduction. Results indicated that hydrogen reduction of the Zn/Z5 significantly improved the aromatic yield. [ZnOH]+ and bridged Zn2+ species were critical species promoting BTX formation, with the former demonstrating higher activity. Besides, the synergistic effect between the Zn species and Brunsted acid sites on HZSM-5 boosts the aromatic yield. Incorporation of Zn was also found to promote long-chain scission. Among all the Zn/Z5, hydrogen reduced 2 wt% Zn/ Z5 (SAR=25) is most effective in producing BTX, with a maximum yield of BTX (48%) and BTX selectivity (93%); hydrogen reduced 2 wt% Zn/Z5 (SAR=50) produced the highest yield of total aromatics (53%).