Porous structure and reactivity of brown coal humic acids chars of different degrees of demineralization
Humic acids are the main constituent of brown coals and can be regarded as a model substance representing the organic matter of coals of low degree of coalification. Humic acids can be obtained with a much lower mineral matter content than that in the parent coals. They seem to be a suitable material for fundamental study on pyrolysis and gasification of coals of low rank. It is troublesome to obtain humic acids in a state of high purity. This research was carried out to evaluate the influence of the degree of demineralization of brown coal humic acids on their behavior in the processes of carbonization and steam gasification, with particular attention to the development of their capillary structure.
- Research Organization:
- Technical Univ., Wroclaw (Poland)
- OSTI ID:
- 5933833
- Report Number(s):
- CONF-8904169-
- Journal Information:
- Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States), Journal Name: Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States) Vol. 34:1; ISSN ACFPA
- Country of Publication:
- United States
- Language:
- English
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ACTIVATION ENERGY
ADSORPTION ISOTHERMS
ALKALINE EARTH METALS
AROMATICS
ASH CONTENT
BENZENE
BROWN COAL
CALCIUM
CARBONACEOUS MATERIALS
CARBONIZATION
CHARS
CHEMICAL ANALYSIS
CHEMICAL PROPERTIES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COAL GASIFICATION
CRYSTAL STRUCTURE
DATA
DECOMPOSITION
DEMINERALIZATION
DEVELOPING COUNTRIES
EASTERN EUROPE
ELEMENTS
ENERGY
ENERGY SOURCES
EUROPE
FOSSIL FUELS
FUELS
GASIFICATION
GRAVIMETRIC ANALYSIS
HEATING RATE
HUMIC ACIDS
HYDROCARBONS
INFORMATION
ISOTHERMS
KINETICS
MATERIALS
METALS
MICROSTRUCTURE
ORGANIC ACIDS
ORGANIC COMPOUNDS
POLAND
POROSITY
PYROLYSIS PRODUCTS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
SEPARATION PROCESSES
SORPTIVE PROPERTIES
STEAM
SURFACE PROPERTIES
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES