| 초록 |
Methanol dehydrogenation was investigated over silica supported basic oxides such as Cs2O, BaO and MgO as basic catalyst. The support for the base oxide catalysts were platelet mesoporous silica, INC-2, having short 2D hexagonal diffusion channel for the impregnation of alkali and alkali earth metal precursors. Dehydrogenation of methanol with CO2 was studied in the process of transforming methanol to formaldehyde, as a result, the selectivity to formaldehyde was enhanced under CO2 atmosphere compared to under inert gas. CO2 played a role as a selectivity tuner for higher formaldehyde selectivity but passivator to sacrifice the conversion of methanol by partial poisoning of basic sites. On the other hand, CO2 could remove hydrogen species formed from methanol, which attributed to the enhanced formaldehyde selectivity and it was demonstrated by the Reverse Water-Gas Shift reaction activity. |
