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Title: Kinetic evaluation of the reactivity of various coal chars for gasification with carbon dioxide in comparison with steam

Abstract

Chars from coals of fuel ratio 1 to 8 were gasified with a CO/sub 2/ - N/sub 2/ mixture at atmospheric pressure. At 1,000/sup 0/ C or less, when the reaction is controlling, the rate of gasification is dependent on the type of coal, and the reactivity is minimal at a fuel ratio (fixed carbon/volatile matter) of about 3. The fractional gasification f and the dimensionless gasification time, when normalized by the time to reach f = 0.5, are correlated by a single curve for all chars, based on a modified volumetric model for the reaction. The rate of gasification and the reactivity of the char are considered to be more closely controlled by the chemical properties of the char surface than by its composition, mineral content, and pore structure.

Authors:
; ;
Publication Date:
Research Org.:
Okayama University, Okayama
OSTI Identifier:
6507967
Resource Type:
Journal Article
Journal Name:
Int. Chem. Eng.; (United States)
Additional Journal Information:
Journal Volume: 25:1
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; CARBON DIOXIDE; CHEMICAL REACTIONS; CHARS; ACTIVATION ENERGY; CHEMICAL REACTION KINETICS; GASIFICATION; COAL GASIFICATION; CHEMICAL PROPERTIES; COMPARATIVE EVALUATIONS; CONTROLLED ATMOSPHERES; FUELS; STEAM; SURFACE PROPERTIES; ATMOSPHERES; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; ENERGY; KINETICS; OXIDES; OXYGEN COMPOUNDS; PYROLYSIS PRODUCTS; REACTION KINETICS; THERMOCHEMICAL PROCESSES; 010404* - Coal, Lignite, & Peat- Gasification

Citation Formats

Kasaoka, S, Sakata, Y, and Tong, C. Kinetic evaluation of the reactivity of various coal chars for gasification with carbon dioxide in comparison with steam. United States: N. p., 1985. Web.
Kasaoka, S, Sakata, Y, & Tong, C. Kinetic evaluation of the reactivity of various coal chars for gasification with carbon dioxide in comparison with steam. United States.
Kasaoka, S, Sakata, Y, and Tong, C. Tue . "Kinetic evaluation of the reactivity of various coal chars for gasification with carbon dioxide in comparison with steam". United States.
@article{osti_6507967,
title = {Kinetic evaluation of the reactivity of various coal chars for gasification with carbon dioxide in comparison with steam},
author = {Kasaoka, S and Sakata, Y and Tong, C},
abstractNote = {Chars from coals of fuel ratio 1 to 8 were gasified with a CO/sub 2/ - N/sub 2/ mixture at atmospheric pressure. At 1,000/sup 0/ C or less, when the reaction is controlling, the rate of gasification is dependent on the type of coal, and the reactivity is minimal at a fuel ratio (fixed carbon/volatile matter) of about 3. The fractional gasification f and the dimensionless gasification time, when normalized by the time to reach f = 0.5, are correlated by a single curve for all chars, based on a modified volumetric model for the reaction. The rate of gasification and the reactivity of the char are considered to be more closely controlled by the chemical properties of the char surface than by its composition, mineral content, and pore structure.},
doi = {},
journal = {Int. Chem. Eng.; (United States)},
number = ,
volume = 25:1,
place = {United States},
year = {1985},
month = {1}
}