A novel approach to highly dispersing catalytic materials in coal for gasification
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 reactivities. The effects of catalyst impregnation conditions (pH and coal surface charge) on the reactivities, in carbon dioxide, of chars derived from Illinois No. 6 coal and its demineralized derivative have been determined. The results show that chars derived from the latter sample are less reactive than those obtained from the raw coal. Impregnation of the acid-leached coal with calcium or potassium from strongly acidic solutions reduced or inhibited char reactivity compared to the unloaded coal, while catalyst loading at pH 6 or pH 10 significantly increased gasification activities. These observations are attributed to increased coal-catalyst precursor interaction, higher metals uptake, and possibly better catalyst dispersion induced by the high negative surface charge density on the coal at the higher pH values. 5 refs., 2 figs.
- Research Organization:
- Clark Atlanta Univ., GA (USA). Research Center for Science and Technology
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- FG22-89PC89760
- OSTI ID:
- 5828744
- Report Number(s):
- DOE/PC/89760-T4; ON: DE91013890
- Country of Publication:
- United States
- Language:
- English
Similar Records
A novel approach to highly dispersing catalytic materials in coal for gasification
A novel approach to highly dispersing catalytic materials in coal for gasification. Eighth quarterly report, July 1, 1991--September 30, 1991
Related Subjects
ACETATES
CATALYTIC EFFECTS
BITUMINOUS COAL
SURFACE PROPERTIES
CALCIUM COMPOUNDS
POTASSIUM CARBONATES
CATALYSTS
CHARS
COAL GASIFICATION
PH VALUE
PROGRESS REPORT
THERMODYNAMIC ACTIVITY
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BLACK COAL
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CARBOXYLIC ACID SALTS
COAL
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
MATERIALS
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
PYROLYSIS PRODUCTS
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification
010600 - Coal
Lignite
& Peat- Properties & Composition