Investigation of factors influencing catalytic activity for n-butane isomerization in the presence of hydrogen on Al-promoted sulfated zirconia

On the Role of Calcination Temperature in Pt-SO 4 2− /ZrO2−Al2O3 Preparation and Catalytic Behaviors During the n-Hexane Hydroisomerization

“…In addition, PSZA catalysts have potential industrial use in n-C 6 hydroisomerization. Preparation parameters for Al 2 O 3 -promoted SZ series catalysts (SZA) have already been investigated at a fixed calcination temperature in the literature [21], but the influence of calcination temperature on ZrO 2 crystallization process, active sites, action between Al and Zr, catalytic performance and their relationship for PSZA catalysts have not yet been reported in the published literature. In this paper, therefore, correlativity of physico-chemical properties and catalytic activities of PSZA catalysts at varying calcination temperatures has been dealt with.…”

Catalytic activities and properties of mesoporous sulfated Al2O3–ZrO2

“…This remarkable promoting effect was most likely attributed to due to a different distribution of acid sites strength and to an enhanced number of acid sites with intermediate strength. Since then, several groups have contributed to Al-promoted sulfated zirconia (SAZ) [24][25][26][27][28][29]. However, when the Al 2 O 3 content exceeds 10wt%, the activity of SAZ catalyst is very low, obviously lower than that of SZ [21,25].…”

Normal Hexane Hydroisomerization Over Alumina Modified Pt/SO42−/ZrO2Catalyst

“…The promotion role was attributed to the increase of weak and moderate strong acid sites over SZ after the addition of Al (Hua et al, 2000;Wang and Mou, 2008). In order to further improve the isomerization performance of SZ or alumina-promoted SZ (SZA), many researchers carried out the investigation about the effect of the preparation method of catalyst on its acidity and isomerization activity (Gao et al, 1998;Moreno and Poncelet, 2001;Sun et al, 2005;Lutecki and Breitkopf, 2009). Sun et al (2005) found that Al-promoted SZ catalysts prepared by coprecipitation and coprecipitation-hydrothermal methods possessed the comparable isomerization activity although SZA with higher surface area by hydrothermal method had higher surface area than that by direct co-precipitation.…”