A study on n-pentane reactions over peroxodisulfated zirconia and sulfated zirconia solid superacid

作者：Song GX; Wang L; Xue HX; Zhang L; Chen JM^*

来源：Chemical Journal of Chinese Universities, 2003, 24(1): 130-134.

• solid superacid
• S2O82-/ZrO2
• SO42-
• ZrO2
• n-pentane
• isomerization
• cracking

n-Pentane reaction, over S2O82-/ZrO2(PSZ) at an ambient temperature in the steady state system has been introduced in relation with the same reaction occurring over SO42-/ZrO2(SZ). It can be concluded that both PSZ and SZ have two functions on n-pentane: isometization and cracking. The products of the two reactions are i-pentane and i-butane respectively. The conversion of n-pentane isomerization and apparent reactive velocity constant lie mainly on the calcining temperature of each sample. The catalysis activity of PSZ is higher than that of SZ: the molar ratio of i-pentane over the former to that over the latter is 1. 3/1 after 1 h reaction. The optimum calcining temperature of PSZ is 550 degreesC, which is 50 degreesC lower than that of SZ. By means of S-content measurement BET, XRD, FTIR and chemical analysis, the physical and chemical characteristics of S2O82-/ZrO2 can be attained. We draw a conclusion that PSZ has stronger Lewis acidic sites and more acid quantity than SZ from the results of the in situ FTIR and Pyridine-FTIR experiment.

• 出版日期2003-1
• 单位复旦大学