High octane ethers from synthesis gas-derived alcohols
The temperature dependence of ether synthesis, particularly unsymmetric methylisobutylether (MIBE), was carried out over the Nafion-H microsaddles (MS) catalyst. The principal product formed under the rather severe reaction conditions of 1100 psig pressure and temperatures in the range of 123--157{degree}C was the expected MIBE formed directly by coupling the methanol/isobutanol reactants. In addition, significantly larger quantities of the dimethylether (DME) and hydrocarbon products were observed than were obtained under milder reaction conditions. Deactivation of the Nafion-H MS catalyst was determined by periodically testing the catalyst under a given set of reaction conditions for the synthesis of MIBE and MTBE from methanol/isobutanol = 2/1, i.e. 123{degree}C, 1100 psig, and total GHSV = 248 mol/kg cat/hr. After carrying out various tests over a period of 2420 hr, with intermittant periods of standing under nitrogen at ambient conditions, the yields of MIBE and MTBE had decreased by 25% and 41%, respectively. In order to gain insight into the role of the surface acidity in promoting the selective coupling of the alcohols to form the unsymmetric ether, the strengths of the acid sites on the catalysts are still being probed by calorimetric titrations in non-aqueous solutions. 11 refs., 13 figs., 9 tabs.
- Research Organization:
- Lehigh Univ., Bethlehem, PA (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-90PC90044
- OSTI ID:
- 6025861
- Report Number(s):
- DOE/PC/90044-3; ON: DE92002759
- Country of Publication:
- United States
- Language:
- English
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ALCOHOLS
SYNTHESIS
ETHERS
CATALYSTS
CHEMICAL REACTION KINETICS
COAL
COAL GASIFICATION
METHANOL
OCTANE
PROGRESS REPORT
SYNTHESIS GAS
YIELDS
ALKANES
CARBONACEOUS MATERIALS
DOCUMENT TYPES
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASES
GASIFICATION
HYDROCARBONS
HYDROXY COMPOUNDS
KINETICS
MATERIALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
REACTION KINETICS
THERMOCHEMICAL PROCESSES
010408* - Coal
Lignite
& Peat- C1 Processes- (1987-)