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

Technical Report · Mon Jan 01 00:00:00 EST 1990

DOI:https://doi.org/10.2172/7081171· OSTI ID:7081171

Abotsi, 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 catalysts for coal gasification. The work is focused on the elucidation of coal-catalyst precursor interactions in solution and the variables which control the adsorption and dispersion of coal gasification metal catalysts. In order to optimize coal-metal ion interactions and hence maximize catalyst activity, the study examines the surface electrochemistry of a lignite, a subbituminous, and a bituminous coals and their demineralized and oxidized derivatives prior to loading with the catalytic materials. The surface electrical properties of the coals are investigated with the aid of electrophoresis, while the effects of the surface charge on the adsorption of K{sup +} and Ca{sup 2+} are studied by agitating the coals with aqueous solutions of potassium and calcium. Zeta potential studies show that the surfaces of the lignite are negatively charged between about pH2 to 11, the negative charge density increasing with increase in pH. Highly alkaline media promoted calcium adsorption due to high negative charge on the coal, while calcium uptake was inhibited in strongly acidic solutions.

• 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: 7081171
• Report Number(s): DOE/PC/89760-T10; ON: DE92019729
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ACETATES
CATALYTIC EFFECTS
BITUMINOUS COAL
SURFACE PROPERTIES
CALCIUM
ADSORPTION
CALCIUM COMPOUNDS
COAL GASIFICATION
CATALYSTS
LIGNITE
POTASSIUM
POTASSIUM CARBONATES
SUBBITUMINOUS COAL
AQUEOUS SOLUTIONS
CATIONS
ELECTROPHORESIS
MIXTURES
PH VALUE
PROGRESS REPORT
ALKALI METAL COMPOUNDS
ALKALI METALS
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
BLACK COAL
BROWN COAL
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CARBOXYLIC ACID SALTS
CHARGED PARTICLES
COAL
DISPERSIONS
DOCUMENT TYPES
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
IONS
MATERIALS
METALS
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
SOLUTIONS
SORPTION
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification
010600 - Coal
Lignite
& Peat- Properties & Composition