Investigation Onbifunctional Catalytic Performance of (Pd+Pt)/HPW/UiO-66 for Normal Hexane Hydroisomerization

One of the main objectives of refineries is to produce high-quality gasoline while respecting environmental standards. Accordingly, the normal hexane hydroisomerization and the preparation of appropriate catalysts for this process still pose a challenge in refineries. Therefore, in this work, heteropoly phosphotungstic acid (HPW), which contains high BrØnsted acid sites, and the metal-organic framework UiO-66 were synthesized. Then, HPW/UiO-66 and (Pd+Pt)/HPW/UiO-66 samples were prepared by impregnation method to improve the stability of the catalyst. Finally, by adding platinum and palladium nanoparticles as promoters, the progress of the performance and activity of the catalyst in the normal hexane hydroisomerization was investigated. In addition, the characteristics of the synthesized samples were determined by XRD, FE-SEM, N2 adsorption/ desorption, and NH3-TPD analyses. Accordingly, in the presence of the bifunctional catalyst (0.2%Pd+0.3%Pt)/50%HPW/UiO-66, the selectivity of iso-hexane and the normal hexane conversion were obtained at 77.4 and 60%, respectively, after 36 h of reaction time.