| 초록 |
Direct dimethyl ether (DME) synthesis from synthesis gas has been studied using various metal pillared ilerites (M-ilerite and M/M-ilerite) as catalyst. The metal pillared ilerite catalysts were synthesized with good crystalline structures and characterized by XRD, BET, SEM, NH3-TPD, ICP-AES and FT-IR. The reaction was carried out in a fixed bed reactor with the prepared catalysts at various temperatures (200∼300℃), various pressures (10∼30 bar) and various reactant gas [H2/CO] ratios of 1∼3. Cu/Zn-ilerite catalyst exhibited high catalytic activity for the direct DME synthesis from synthesis gas. The CO conversion over Cu/Zn-ilerite reached up to about 62% with the DME selectivity of about 90% at 250℃, 20bar, H2/CO=2. This catalyst could be used several times without any change in its catalytic activity. |
