| 초록 |
The methodologies of selective ethanol synthesis by multi-step series reactions through (1) CO hydrogenation to dimethyl ether (DME), (2) DME carbonylation to methyl acetate (MA) and (3) MA hydrogenation to ethanol were investigated using heterogeneous bifunctional catalysts. A final yield of ethanol was found to be around 50% by using some ordered mesoporous hybrid catalysts. In addition, a possible integration methodology of each reaction steps was proposed by using one fluidized-bed reactor with a concept of layer-inversion technology. For example, two catalytic layers in one fluidized-bed reactor can transform DME to ethanol through DME carbonylation to MA at a first lower catalyst layer and MA hydrogenation to ethanol at a second higher catalyst layer simultaneously. These concepts are verified by carrying out a sequential double-bed catalytic reaction as well as by simulating layer-inversion phenomena in a fluidized-bed reactor using a BARACCUDA program. |
