Impact of proximity between NiMoS and zeolitic HY sites on cyclohexene hydroconversion: An infrared operando study of sulfide catalysts

This work evaluates the effects of sulfide phase location on zeolite-containing catalysts in cyclohexene hydroconversion using infrared operando technique. Parallels between activity, product yield, and surface species changes with time stream under pyridine poisoning were assessed pure HY zeolite, sulfided NiMo/HY, NiMo/Al2O3, NiMo/Al2O3 + HY. Isomerization activity could be related to zeolitic acidic OH groups hydrogenation sites. From due pulse injection, intrinsic activities calculated for isomerization (1-methyl-1-cyclopentene) (cyclohexane) routes. The turnover frequency value is greater than that by one order magnitude. Hence, effect N-molecule will 10 times higher route. Whatever phase, coke mostly formed zeolite. As a consequence, close proximity sites results lower formation hydrogenated products, blockage some coke. In contrast, less affected coke, NiMoS being located alumina. However, show acid allows degree (1-methyl-1-cyclopentene). Thus, has beneficial methylcyclopentane formation.