文献类型：期刊文献

英文题名：Hierarchical pore construction of alumina microrod supports for Pt catalysts toward the enhanced performance of n-heptane reforming

作者：Yang, Zhirong[1];Shi, Yao[1];Lin, Yan[1];Luo, Li[1];Song, Nan[1];Lin, Jianyang[1];Peng, Chong[2];Sui, Baokuan[2];Zhang, Jing[1];Qian, Gang[1];Zhou, Xinggui[1];Duan, Xuezhi[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]SINOPEC, Dalian Res Inst Petr & Petrochem, Dalian 116045, Liaoning, Peoples R China

年份：2022

卷号：252

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20214811238392);WOS:【SCI-EXPANDED(收录号:WOS:000779491600004)】；

基金：This work was supported by the National Natural Science Foun-dation of China, China (22008072, 22008074, 21922803, 21991104) , the Program of Shanghai Academic/Technology Research Leader, China (21XD1421000) , China Postdoctoral Science Foundation, China (2020 M671025, 2019TQ0093) , Natural Science Foundation of Shanghai, China (20ZR1415700) , the Innova-tion Program of Shanghai Municipal Education Commission, China.

语种：英文

外文关键词：Alumina microrods; Hierarchical pore; Heptane reforming; Metal dispersion Carbon deposition

摘要：Regulation of pore hierarchy has been an important subject in the design of industrial catalysts. Synthesis of alumina without template/additive often results in poor control of morphologies, porosities, and metal dispersion thereafter. Herein, alumina microrods with a tailored pore hierarchy (Rod2) were fabricated without template/additive by tuning the pore structure of the synthetic precursors, which were used as supports of Pt for n-heptane reforming. Improved toluene selectivity was observed at low space veloc-ities as a result of promoted dehydroisomerization of pentacyclic hydrocarbons, presumably due to a combined effect of the desired pore hierarchy and rod morphology. The Pt/Rod2 also showed better resis-tance to carbon deposition while maintaining good metal dispersion, as compared to alumina supports with spherical morphology or uncontrolled pore hierarchy. The simulation results revealed that the improved toluene selectivity of Pt/Rod2 is attributed to the proper pore combination of meso-pore1 (6-40 nm) and meso-pore 2 (40-300 nm).(c) 2021 Elsevier Ltd. All rights reserved.