A review of the factors influencing the physicochemical characteristics of underground coal gasification
Journal Article
·
· Energy Sources, Part A: Recovery, Utilization, and Environmental Effects
- China University of Mining and Technology, Jiangsu (China)
In this article, the physicochemical characteristics of the oxidation zone, the reduction zone, and the destructive distillation and dry zone in the process of underground coal gasification (UCG) were explained. The effect of such major factors as temperature, coal type, water-inrush or -intake rate, the quantity and quality of wind blasting, the thickness of coal seams, operational pressure, the length, and the section of gasification gallery on the quality of the underground gas and their interrelationship were discussed. Research showed that the temperature conditions determined the underground gas compositions; the appropriate water-inrush or -intake rate was conducive to the improvement in gas heat value; the properties of the gasification agent had an obvious effect on the compositions and heat value of the product gas. Under the cyclically changing pressure, heat losses decreased by 60%, with the heat efficiency and gasification efficiency being 1.4 times and 2 times those of constant pressure, respectively. The test research further proved that the underground gasifier with a long channel and a big cross-section, to a large extent, improved the combustion-gasification conditions.
- OSTI ID:
- 21049872
- Journal Information:
- Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, Journal Name: Energy Sources, Part A: Recovery, Utilization, and Environmental Effects Journal Issue: 11 Vol. 30; ISSN 1556-7036
- Country of Publication:
- United States
- Language:
- English
Similar Records
Coal gasification in a large underground gasifier: Process efficiency
Assessment of underground coal gasification in bituminous coals. Final report. Phase II
Lawrence Livermore National Laboratory Underground Coal Gasification project
Conference
·
Tue Dec 30 23:00:00 EST 1997
·
OSTI ID:324692
Assessment of underground coal gasification in bituminous coals. Final report. Phase II
Technical Report
·
Sat Jan 30 23:00:00 EST 1982
·
OSTI ID:5323789
Lawrence Livermore National Laboratory Underground Coal Gasification project
Technical Report
·
Sun Oct 15 00:00:00 EDT 1989
·
OSTI ID:5171750