A novel approach to highly dispersing catalytic materials in coal for gasification

Technical Report · Tue Jan 01 00:00:00 EST 1991

DOI:https://doi.org/10.2172/5916792· OSTI ID:5916792

Abotsi, G M.K.; Bota, K B

This project seeks to develop a technique, based on coal surface properties, for highly dispersing catalysts in coal for gasification and to investigate the potential of using potassium carbonate and calcium acetate mixtures as catalyst for coal gasification. The lower cost and high catalytic activity of the latter compound will produce economic benefits by reducing the amount of K{sub 2}CO{sub 3} required for high coal char activities. The effects of potassium impregnation conditions (pH and coal surface charge) on the reactivities, in carbon dioxide, of chars derived from demineralized lignite, subbituminous and bituminous coals have been determined. Impregnation of the acid-leached coal with potassium from strongly acidic solutions resulted in initial slow char reactivity which progressively increased with reaction time. Higher reactivities were obtained for catalyst (potassium) loaded at pH 6 or 10. The dependence of char gasification rates on catalyst addition pH increased in the order: pH 6 {approximately} pH 10 {much gt} pH 1.

• Research Organization: Clark Atlanta Univ., GA (United States). Research Center for Science and Technology
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-89PC89760
• OSTI ID: 5916792
• Report Number(s): DOE/PC/89760-T6; ON: DE92004867
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ACETATES
CATALYTIC EFFECTS
CALCIUM COMPOUNDS
COAL
SURFACE PROPERTIES
POTASSIUM CARBONATES
BITUMINOUS COAL
CHARS
COAL GASIFICATION
LIGNITE
PH VALUE
PROGRESS REPORT
SUBBITUMINOUS COAL
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BLACK COAL
BROWN COAL
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CARBOXYLIC ACID SALTS
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
MATERIALS
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
PYROLYSIS PRODUCTS
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification