CO2 Gasification Reactivity and Kinetics Studies of Raw Coal, Super Clean Coal and Residual Coals obtained after Organo-refining (Solvent Extraction)

  • Durlubh Kumar Sharma Centre for Energy Studies, Indian Institute of Technology Delhi
  • C.C. Giri Centre for Energy Studies, Indian Institute of Technology Delhi


Gasification of coal is important for the generation of H2. This is also good for Integrated Gasification Combined Cycle(IGCC) power generation which can be easily and relatively cheaply combined with CO2 concentration, storage and utilizationsystems. Solvent extraction of coal in organic solvents results in the production of super clean coal, mostly having less than1% ash. The present paper reports the effect of solvent extraction (organo-refining) of Samla coal by using an industrialsolvent, such as N-methyl-2-pyrrolidone (NMP), a coal derived solvent, such as, anthracene oil (AO) and a petroleum derivedsolvent, i.e. cetene (CE), on the CO2 gasification of coal. Different solvents had different effects on the CO2 gasification ofsuper clean coal (SCC) or of residual coal (RC) obtained after the organo-refining of coals in different solvents. The CO2gasification reactivity of raw coal as well as of solvent treated coals was found to increase with increase in the temperature ofthe gasification from 900 to 1100C. The treatment of coal with solvents has been found to affect the CO2 gasification reactivity.Super clean coals obtained from the organo-refining in the cetene and NMP showed good CO2 gasification reactivity. Residualcoals obtained from the organo-refining in NMP and CE also showed good CO2 gasification reactivity. Kinetics studies haverevealed that the activation energies of CO2 gasification reactions are reduced as a result of organo-refining of coal in differentsolvents. While organo-refining of coals in NMP and if possible in CE as well may help in obviating some of the majorengineering problems in IGCC power generation, this integration may not be economically attractive at present. Future IGCCpower generation may involve the use of CO2 and O2 as the gasifying medium.


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How to Cite
SHARMA, Durlubh Kumar; GIRI, C.C.. CO2 Gasification Reactivity and Kinetics Studies of Raw Coal, Super Clean Coal and Residual Coals obtained after Organo-refining (Solvent Extraction). Journal of Power Technologies, [S.l.], v. 96, n. 3, p. 157--169, oct. 2016. ISSN 2083-4195. Available at: <>. Date accessed: 03 aug. 2021.
Combustion and Fuel Processing


CO2 gasification, organo-refining, NMP, anthracene oil, cetene, active surface area, catalysts, mineral matter, diffusion controlled kinetics

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