NIOSHTIC-2 Publications Search

Coal Pyrolysis At Fire-level Heat Flux.

Authors
Lee-CK; Singer-JM; Chaiken-RF
Source
Combust Sci Technol Gordon & Breach Sci Publ Ltd Great Britain 16:205-213
Link
NIOSHTIC No.
10009666
Abstract
Pyrolysis of Pittsburgh seam coal at fire-level surface heat fluxes of 0.76 and 2.0 Cal/cm2-sec was investigated by measuring mass-loss rate, density, temperature and internal gas pressure of pyrolyzing coal, and thermal properties of coal and coke. Local and overall heats of pyrolysis were determined from these measurements at 2.0 Cal/cm2-sec. It was found that as coal pyrolyzes, a surface coke layer grows behind a low-density plastic zone that propagates into the virgin coal. The plastic zone is characterized by initial endothermic decomposition of virgin coal into a metaplast of liquid and gas, and subsequent exothermic polymerization of these products to form coke. Exothermic reactions also occur in the surface coke layer. The sequential pyrolysis reactions were identified with respect to various density zones in the reacting coal.
Publication Date
19770101
Document Type
OP;
Fiscal Year
1977
Identifying No.
OP 94-77
NIOSH Division
PRC;
Source Name
Combust. Sci. Technol., Gordon & Breach Sci. Publ., Ltd., Great Britain, V. 16, PP. 205-213
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division