Direct observations of devolatilizing pulverized coal particles in a combustion environment

Conference · Thu Jan 01 04:00:00 EST 1981 · Symp. (Int.) Combust., (Proc.); (United States)

OSTI ID:5220574

McLean, W J; Hardesty, D R; Pohl, J H

Direct observations of the early stages of combustion of size-graded (approximately 100 /mu/m) pulverized coal particles are reported. The particles are introduced on the centerline of a high temperature, transparent, laminar flow reactor fed by a gas fueled, premixed flat flame. Photographs of particle emission, high magnification shadowgraphs of burning particles, and micrographs of partially burnt captured material have been obtained. The ignition of both bituminous coal and lignite subjected to rapid heating (approximately 10/sup 5/ K/sec) by hot combustion products is characterized by bright diffuse emission attributed to burning of ejected volatile matter. Shadowgraphs and micrographs of burning bituminous coal indicate that, coincident with ignition, ejected volatile matter forms a condensed phase surrounding the particle. This study is pertinent to coal gasification. 29 refs.

• Research Organization: Sandia Lab, Livermore, CA
• OSTI ID: 5220574
• Report Number(s): CONF-800809-
• Conference Information: Journal Name: Symp. (Int.) Combust., (Proc.); (United States)
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
010600 -- Coal
Lignite
& Peat-- Properties & Composition
BITUMINOUS COAL
BLACK COAL
BROWN COAL
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COAL FINES
COAL GASIFICATION
DEVOLATILIZATION
ENERGY SOURCES
EVALUATION
FOSSIL FUELS
FUELS
GASIFICATION
LIGNITE
MATERIALS
OXIDATION
SOOT
THERMOCHEMICAL PROCESSES