Fundamental studies of catalytic gasification

Technical Report · Thu Mar 01 04:00:00 EST 1990

OSTI ID:6696803

Heinemann, H; Somorjai, G A

Previous work has shown that chars and coal can be gasified with steam in the presence of alkali-transition metal oxide catalysts or alkali-earth catalysts at relatively low temperatures. These studies are to be extended to the investigation of the amounts of catalysts required and whether a throw away catalyst can be used. This quarter work was concentrated on the oxidative coupling of methane over catalysts of the type discovered during coal gasification. Highlights include: discovery of a novel catalyst (KCaNiO{sub x}) that will permit oxidative coupling of methane at close to 100% selectivity to C{sub 2} hydrocarbons at 10% CH{sub 4} conversion; the presence of water has been found important for oxidative coupling of C{sub 4} over either KCaNiO{sub x} or KCaO{sub x} catalysts; absence of CO{sub x} in the products from coupling greatly effects economics; high selectivity to C{sub 2} hydrocarbons was maintained over extended periods of time; a large number of potential methane coupling catalysts were prepared; calcination conditions of the catalysts were found to be important factors; and KCaO{sub x} catalysts steam gasification of char give highest C{sub 2} yields at the lowest CH{sub 4}/O{sub 2} ratios feasible outside explosive limits. 2 figs., 4 tabs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• Sponsoring Organization: DOE/FE
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6696803
• Report Number(s): LBL-28710; ON: DE90016633
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBON
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHARS
CHEMICAL REACTION KINETICS
COAL GASIFICATION
COBALT COMPOUNDS
COBALT OXIDES
DOCUMENT TYPES
ELEMENTS
GASIFICATION
HYDROCARBONS
KINETICS
METHANE
MINERALS
NICKEL COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTIAL PRESSURE
POTASSIUM COMPOUNDS
PROGRESS REPORT
PYROLYSIS PRODUCTS
REACTION KINETICS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
YIELDS