| 초록 |
The steam reforming of dimethyl ether (DME) is scientific and technological interest as a hydrogen source for fuel cells. The reaction proceeded via a successive two step mechanism: hydration of DME to methanol over solid acids, followed by steam reforming of methanol to produce H2 and CO2 over copper oxide based catalysts. In this study, the catalysts which is appreciate for the producing much H2 and less CO was prepared. γ-Alumina, especially Lewis acid sites for DME hydrolysis into methanol, and active metals such as copper for methanol steam reforming to H2 and CO2 are mixed. Adding Zn to Cu/Al2O3 not only improved H2 production, but also reduced CO production. The appropriate weight ratio of active metals and solid acids catalysts was optimized. Furthermore, DME conversion was not influenced by H2O/DME ratio in the feed gas, while CO formation was suppressed with a rise in H2O/DME ratio. |
