Importance of active sites for char gasification in oxygen (air) and carbon dioxide. Annual report, October 1982-September 1983

Technical Report · Sat Oct 01 00:00:00 EDT 1983

OSTI ID:5166006

The isothermal and nonisothermal gasification reactivities in air of a Montana lignite, and several of its chars, have been measured by thermogravimetric analysis. The nonisothermal reactivity measurements were devised in order that the reactivities of coals and chars could be compared directly. Data generated in this study indicate that this approach to determining gasification reactivity does provide a meaningful characterization of both coals and chars. Samples of the lignite were pretreated by demineralization, ion exchange with ammonium acetate, and subsequent ion exchange with calcium acetate. It was found that the lignite which had been loaded with calcium was significantly more reactive than the raw or demineralized coal. Chars were prepared from these samples of pretreated and raw lignite at 1273 K (heating rate, 10 K/min). Nonisothermal reactivity profiles showed that increased calcium loading results in progressively increased reactivity for this series of chars.

• Research Organization: Pennsylvania State Univ., University Park (USA)
• OSTI ID: 5166006
• Report Number(s): PB-84-148105
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
ALKALINE EARTH METALS
BROWN COAL
CALCIUM
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CATALYSIS
CATALYTIC EFFECTS
CHALCOGENIDES
CHARS
CHEMICAL REACTION KINETICS
COAL
COAL GASIFICATION
COAL PREPARATION
DEMINERALIZATION
ELEMENTS
ENERGY SOURCES
FEDERAL REGION VIII
FOSSIL FUELS
FUELS
GASIFICATION
KINETICS
LIGNITE
MATERIALS
METALS
MONTANA
NONMETALS
NORTH AMERICA
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PYROLYSIS PRODUCTS
REACTION KINETICS
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
USA