Hydroisomerization of n-hexane over Mo-loaded Pt/H-Mor catalysts

Abstract

Three Mo-Pt/H-Mor catalysts, HM-2, HM-3 and HM-4 were prepared by loading 0.05, 0.10 and 0.15 wt.% of Mo, respectively, on the Pt/H-Mor (HM-1) support. Effect of the Mo loading on the n-hexane hydroisomerization reaction was studied by comparing the products obtained on the parent Pt/H-Mor support and the three Mo-loaded catalysts. The n-hexane conversions were increased with a Mo loading up to 0.10 wt.% Mo (HM-2), and a further increase of the Mo content to 0.15 wt.% (HM-3) caused a decrease in the conversion. Among the catalysts, HM-3 prepared by 0.10 wt.% Mo loading on Pt-HM provided the highest isomer yield of 57.4 wt.%, with the highest di-branched isomer selectivity of 11.7 wt.%. The catalytic activity of Mo-loaded catalysts was greatly influenced by the reaction temperature, i.e., the catalysts exhibited an increase in the isomer yields with increasing reaction temperatures, i.e. from 250°C to 310°C.