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Combustion behaviour of some biodesulphurized coals assessed by TGA/DTA

Marinov, S.P. and Gonsalvesh, L. and Stefanova, M. and Yperman, J. and Carleer, R. and Reggers, G. and Yürüm, Yuda (2009) Combustion behaviour of some biodesulphurized coals assessed by TGA/DTA. (Accepted/In Press)

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Abstract

Thermal analysis, i.e. TGA/DTA is used to study the changes in the combustion behaviour of microbially treated coals. In view of their high sulphur content and industrial significance three samples are under consideration, i.e. one lignite and two subbituminous from different region in Bulgaria. The differences in burning profiles can be related to structural changes resulted from biological treatments. The overall biological treatment generates these changes probably due to the oxidation process. Concerning organic sulphur biodesulphurization there is no change in any drastic mannerof the thermal characteristic parameters. In general, applied biotreatments provoke a complex influence on combustion coal behaviour. From one side a better ignition performance, a minor decrease in higher heating value and diminishing peak temperature of maximum weight loss rate for all biotreated samples are observed. From other side some decrease in the combustibility indicated by an increase in the combustion time and the end of combustion temperature are obvious. Also well determined decrease of self-heating temperature after biotreatments evolves high risk of spontaneous unmanageable coal combustion.

Item Type:Article
Subjects:T Technology > TP Chemical technology
Q Science > QD Chemistry
ID Code:12435
Deposited By:Yuda Yürüm
Deposited On:02 Nov 2009 14:00
Last Modified:28 Dec 2009 13:44

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