Application of the Dubinin-Astakhov equation to the evaluation of the benzene and cyclohexane adsorption isotherms on steam gasified humic acids chars from brown coal
The aim of this work was to establish, for a suite of carbonaceous materials, the values of n (exponent in the Dubinin-Astakhov equation) for which a satisfactory agreement would be obtained between the experimental adsorption data and the DA equation, trying also to verify the obtained DA parameters referring to related results calculated, or obtained experimentally, independently. As adsorptives benzene (frequently used as standard) and cyclohexane (to avoid the presence of /pi/ - electrons in the molecule) were chosen. To have a suite of samples characterized by a systematically changing porosity, humic acids steam gasified chars were prepared with varying burn-offs. Humic acids from brown coals can be obtained with a low mineral matter content and they are thought to be representative for the organic substance of low rank coals. Additionally, two industrial active carbons, described elsewhere were investigated.
- Research Organization:
- Technical Univ., Wroclaw (Poland)
- OSTI ID:
- 5955239
- Report Number(s):
- CONF-8809271-
- 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. 33:4; ISSN ACFPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ACTIVATED CARBON
ADSORBENTS
ADSORPTION
ADSORPTION ISOTHERMS
ALKANES
AROMATICS
ASH CONTENT
BENZENE
BROWN COAL
CARBON
CARBONACEOUS MATERIALS
CHARS
CHEMICAL COMPOSITION
CHEMICAL PROPERTIES
COAL
COAL GASIFICATION
COMPARATIVE EVALUATIONS
CYCLOALKANES
CYCLOHEXANE
DATA
ELEMENTS
ENERGY SOURCES
EQUATIONS
FOSSIL FUELS
FUELS
GASIFICATION
HUMIC ACIDS
HYDROCARBONS
INFORMATION
ISOTHERMS
KINETIC EQUATIONS
MATERIALS
MATTER
MINERALS
MOISTURE
NONMETALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
POROSITY
PYROLYSIS PRODUCTS
SORPTION
SORPTIVE PROPERTIES
STEAM
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
VOLATILE MATTER