Combined gasification of lignite coal: thermodynamic and application study

Kale, Ganesh R. ; Kulkarni, Bhaskar D. ; Chavan, Ranjit N. (2014) Combined gasification of lignite coal: thermodynamic and application study Journal of the Taiwan Institute of Chemical Engineers, 45 (1). pp. 163-173. ISSN 1876-1070

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Combined gasification (a combination of steam gasification and CO2 gasification) without air is an important process for research in coal gasification to reduce the steam generation energy in the gasification system and also to enhance the slow CO2 gasification reaction. A thermodynamic study involving the effect of temperature, pressure and feed CO2 and steam ratios in gasification of lignite coal was studied in this paper. The product generation trends of syngas and methane with carbon (in coal) conversion were studied in detail. The carbon (in lignite coal) was converted completely at a lower temperature than pure carbon in the combined gasification. Some applications of the gasifier product gas were also studied. Combined gasification offers great advantages to produce syngas of exact ratio in one step for use in petrochemical manufacture and fuel cell systems. The complete carbon (in coal) conversion occurred beyond the thermoneutral gasification temperature in the study. The combined gasification process was a useful way for CO2 utilization reducing the net CO2 emission to the atmosphere.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Coal gasification; CO2 Utilization; Coal to Syngas; Combined Gasification; Thermodynamic Study
ID Code:111146
Deposited On:27 Nov 2017 12:23
Last Modified:27 Nov 2017 12:23

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