| 초록 |
Direct dimethylether (DME) synthesis from synthesis gas (CO + H2) has been studied using various metal pillared layered silicate ilerites (M-ilerite) as catalyst. The metal pillared layered silicate ilerite catalysts were synthesized with good crystalline structures and characterized by XRD, BET, SEM and FT-IR. The reaction was carried out in a fixed bed reactor with the prepared catalysts at different temperatures (200-300℃), different pressures (10-30bar) and with reactant gas ratio [H2/CO]of 2:1. Cu/Zn- and Zn/Cu-ilerite exhibited high catalytic activities for the direct DME synthesis from synthesis gas. The CO conversion over Cu/Zn-ilerite reached up to about 60-62% with the DME selectivity of 85-87% at 250℃, 20bar. There was no activity decrease for the Cu/Zn-ilerite catalyst during 100h of reaction. |
