Study of coal oxidation behaviour in re-opened sealed heating

Possible changes in the oxidation behaviour of coal in the spontaneous combustion site of re-opened sealed heating were studied. Two samples of bituminous coal and three types of coal pre-treatment procedures were applied to simulate in situ conditions at the “spon-com” site: i) pre-oxidation of coa...

Full description

Saved in:
Bibliographic Details
Published in:Journal of loss prevention in the process industries 2016-03, Vol.40, p.433-436
Main Authors: Taraba, Boleslav, Pavelek, Zdenek
Format: Article
Language:English
Subjects:
Bituminous coal
Carbon monoxide
Coal
Coal oxidation
Gas evolution
Heat treating
Heating
Hydrocarbons
Indication
Oxidation
Re-opened heating
Spontaneous combustion
Temperature effects
Water
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Possible changes in the oxidation behaviour of coal in the spontaneous combustion site of re-opened sealed heating were studied. Two samples of bituminous coal and three types of coal pre-treatment procedures were applied to simulate in situ conditions at the “spon-com” site: i) pre-oxidation of coal, ii) pre-heating of coal under inert gas, and iii) immersion of pre-heated coal in liquid water. Pre-treated samples were then examined for the production rate of the indication gases evolved during oxidation and for oxidation heat effects. Two main conclusions were drawn with respect to oxidation of the coal in re-opened sealed heating: i) carbon monoxide and unsaturated hydrocarbons maintain their relevance as spontaneous combustion indication gases, however, increased production of both carbon oxides can be expected; ii) coal in the extinguished spontaneous combustion site gains increased susceptibility to the self-heating process. •Increased CO and CO2 evolution in re-opened heating can be expected.•Production of unsaturated hydrocarbons is unaffected.•Coal in extinguished “Spon-Com” site gains increased susceptibility to self-heating.
ISSN:0950-4230
1873-3352
DOI:10.1016/j.jlp.2016.02.002