文献类型：期刊文献

英文题名：Study on the Mechanism of Water Poisoning Pt-Promoted Sulfated Zirconia Alumina in n-Hexane Isomerization

作者：Zhou, Sinong[1];Song, Yueqin[1];Zhao, Jigang[1];Zhou, Xiaolong[1];Chen, Lifang[2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]Inst Politecn Nacl, ESIQIE, Mexico City 07738, DF, Mexico

年份：2021

卷号：35

期号：18

起止页码：14860

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20213910939734);WOS:【SCI-EXPANDED(收录号:WOS:000697334900045)】；

语种：英文

外文关键词：Hexane - Zirconia - Alumina - Catalyst poisoning - Platinum compounds - Aluminum oxide - Isomers - Atoms - Hydrogen

摘要：In present work, the water poisoning mechanism was investigated since a rapid deactivation was observed in n-hexane isomerization over the Pt-promoted sulfated zirconia alumina (termed as PtSZA) catalyst with a high-moisture-content feed (111 ppm). It was concluded that with the presence of hydrogen, the hydrogen molecules dissociated to hydrogen atoms on Pt sites and the partial hydrogen atoms spilled over to Zr-delta(+) to form acid sites which were the catalytic sites for isomerization. When the water in the feed adsorbed on the catalyst, it could combine Zr-delta(+) to form Zr-OH groups. In this way, the generation of acid sites was suppressed and the catalyst deactivated due to the lack of catalytic sites.