One-Step DME Synthesis from Coal-Derived, CO-Rich Syngas in a Slurry Reactor
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- One-Step DME Synthesis from Coal-Derived, CO-Rich Syngas in a Slurry Reactor
- Seo, Yongwon; Jo, Sung-Ho; Ryu, Ho-Jung; Yi, Chang-Keun; Jin, Gyoung Tae
- Bifunctional catalyst; CO-rich syngas; DME; One-step synthesis; Slurry reactor
- Issue Date
- SOC CHEMICAL ENG JAPAN
- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, v.41, no.7, pp.585 - 589
- This study investigates one-step dimethyl ether (DME) synthesis from coal-derived, CO-rich syngas over a bifunctional catalyst comprising a methanol synthesis catalyst (Cu/ZnO/Al 2O 3) and a methanol dehydration catalyst (γ-Al 2O 3). The liquid-phase DME synthesis was carried out in a slurry reactor that provided good mixing and excellent heat removal. Higher CO conversion and DME space time yield (STY) were observed at a higher reaction temperature and a higher pressure. A lower gas hourly space velocity (GHSV) caused higher CO conversion, but a lower DME STY. Excessive content of γ-Al 2O 3 had an adverse effect on both CO conversion and DME STY. Among various H 2:CO ratios, the maximum DME STY (13.5 mol/kg-cat/h) was observed at a H 2:CO ratio of 1.0. CO 2 in the feed syngas had a negative effect on DME synthesis. The results and data obtained in this study can be used as basic data for the design and operation of a large scale bubble column reactor and for further application to a three-phase fluidized bed reactor.
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