Synthesis of dimethyl ether and alternative fuels in the liquid phase from coal-derived syngas; Quarterly technical progress report No. 2, 1 April--30 June 1990
Contract objectives are: development of a one-step liquid phase dimethyl ether/methanol process; and investigation of the potential of liquid phase synthesis of alternative fuels from coal-derived synthesis gas. In the one-step liquid phase Dimethyl Ether (DME) program, the optimum ratio of methanol synthesis catalyst to DME forming catalyst is forming 4.3 to 1 under reaction conditions of 250{degrees}C and 750 psig. At a commercially significant space velocity of 6000 sl/kg-hr, the methanol equivalent productivity is 50% higher than that for methanol synthesis alone. Using Shell gas instead of ``CO-rich`` (Texaco) gas leads to lower DME productivity due to the lower hydrogen content. In exploratory tests for new fuels produced directly from syngas, a slurry of H-ZSM-5 zeolite in a Decalin liquid medium successfully produced DME and C{sub 2}-C{sub 4} alkanes from a syngas/methanol feedstock. As anticipated, Decalin was less easily cracked by the ZSM-5. A slurry consisting of a 50/50 mixture of S3-86 methanol catalyst and H-ZSM-5 zeolite in Decalin produced C1-C7 hydrocarbons, DME and methanol from a CO-rich gas feed. The non-optimum conditions, however, resulted in a poor selectivity to gasoline -- boiling hydrocarbons (2.5% by wt.). More tests are planned for July. In exploratory work on new fuels, Cesium doping of the S3-86 methanol catalyst gave good yields (11--23 wt %) of higher, C{sub 2}-C{sub 5}, alcohols in a liquid phase unit. Liquid stability was excellent. 6 tabs., 22 figs.
- Research Organization:
- Air Products and Chemicals, Inc., Allentown, PA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-90PC89865
- OSTI ID:
- 721558
- Report Number(s):
- DOE/PC/89865-2; ON: TI92020080
- Resource Relation:
- Other Information: PBD: 11 Jan 1991
- Country of Publication:
- United States
- Language:
- English
Similar Records
Shape-selective catalysis in dimethyl ether conversion
Synthesis of dimethyl ether and alternative fuels in the liquid phase from coal-derived synthesis gas. Final technical report