Silica Alumina Supported with Metal Oxides: MBOH Catalytic Activities & Effect of Water Addition

At the present research, different samples of Silica alumina doped with different metal oxides such as titanium oxide, hafnium oxide and zirconium oxide characterized by temperature programmed desorption of ammonia, BET measurements and, primarily in the conversion of methylbutynol (MBOH) which is a test reaction for the decisiveness of basic acidic, amphoteric properties of solids. The results showed that acidity of metal oxides supported with alumina take the following order, HfO2/Al2O3 (1585) less than HfO2/Al2O3 (1090) less than HfO2/Al2O3 (595) less than ZrO2/Al2O3 (595) less than TiO2/ Al2O3 (595). Moreover, the effect of water addition to MBOH was considered in this study over different bulk metal oxides supported with silica alumina. Results showed that with the exception of ZrO2 a clear increase of the MBOH conversion. It was also recorded that the increase in the MBOH conversion can be significantly improved with the samples hafnium oxide doped with alumina, where with HfO2/Al2O3 (1090) the conversion raised from 40 to 50 % by addition of water.