Effects of sewage sludge blending on the coal combustion: A thermogravimetric assessment

Combustion of urban sewage sludge together with coal in existing infrastructures may be a sustainable management option energetically interesting for these materials, usually considered wastes. Thermogravimetric analysis was used to study the combustion of a semianthracite coal and the modifications...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2007-11, Vol.69 (11), p.1740-1750
Main Authors: Otero, M., Gómez, X., García, A.I., Morán, A.
Format: Article
Language:English
Subjects:
Air pollution caused by fuel industries
Applied sciences
Calorimetry, Differential Scanning
Co-combustion
Coal
Energy
Energy-Generating Resources
Energy. Thermal use of fuels
Exact sciences and technology
Fuel selection. Additives
Incineration - methods
Kinetics
Models, Theoretical
Other industrial wastes. Sewage sludge
Pollution
Pollution reduction
Sewage - chemistry
Sewage sludge
Thermogravimetric analysis
Thermogravimetry
Wastes
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Summary:Combustion of urban sewage sludge together with coal in existing infrastructures may be a sustainable management option energetically interesting for these materials, usually considered wastes. Thermogravimetric analysis was used to study the combustion of a semianthracite coal and the modifications undergone when adding a small percentage (2%, 5%, 10%) of sewage sludge. Both Differential Scanning Calorimetric analysis and Differential Thermogravimetry burning profiles showed differences between coal and sewage sludge combustion. However, the effects of adding a percentage of sewage sludge equal or smaller than 10% was hardly noticeable in terms of heat release and weight loss during the coal combustion. This was further proved by non-isothermal kinetic analysis, which was used to evaluate the Arrhenius activation energy corresponding to the co-combustion of the blends. This work shows that thermogravimetric analysis may be used as an easy rapid tool to asses the co-combustion of sewage sludge together with coal.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2007.05.077