Single-Stage, Liquid-Phase Dimethyl Ether Synthesis Process from Syngas IV. Thermodynamic Analysis of the Lpdme Process System


In the LPDME process, methanol synthesis catalyst (composed of CuO, ZnO, and Al₂O₃) and the methanol dehydration catalyst (gamma-alumina) are slurried in the inert liquid phase. The catalysts constitute the solid phase. Syngas components (H₂, CO, CO₂, and CH₄) and the products (CH₃OH, H₂O, and DME) constitute the vapor phase. At least three chemical reactions, viz., methanol synthesis, water-gas shift, and methanol dehydration also occur simultaneously in the liquid phase. The multicomponent phase equilibrium and the simultaneous chemical reaction equilibrium for this process system have been studied. The thermodynamic analysis has been presented in terms of the equilibrium conversions for H₂ and CO, syngas, and the concentration driving forces for H₂ and CO. Methanol synthesis alone and co-production of methanol and DME are compared. The effects of water and CO2addition to the feed syngas on the equilibrium conversions are also investigated.


Chemical and Biochemical Engineering

Document Type

Article - Journal

Document Version


File Type





© 1992 Taylor & Francis, All rights reserved.

Publication Date

01 Jan 1992