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Nonisothermal Thermogravimetric Analysis of Thai Lignite with High CaO Content

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type , Journal 01 Jan 2013Publisher:WileyJournal:The Scientific World Journal, volume 2,013 (issn: 2356-6140, eissn: 1537-744X,

Authors: Pakamon Pintana; Nakorn Tippayawong;

doi: 10.1155/2013/216975

pmid: 24250259

pmc: PMC3821929

Nonisothermal Thermogravimetric Analysis of Thai Lignite with High CaO Content

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Abstract

Thermal behaviors and combustion kinetics of Thai lignite with different SO3‐free CaO contents were investigated. Nonisothermal thermogravimetric method was carried out under oxygen environment at heating rates of 10, 30, and 50°C min−1 from ambient up to 1300°C. Flynn‐Wall‐Ozawa (FWO) and Kissinger‐Akahira‐Sunose (KAS) methods were adopted to estimate the apparent activation energy (E) for the thermal decomposition of these coals. Different thermal degradation behaviors were observed in lignites with low (14%) and high (42%) CaO content. Activation energy of the lignite combustion was found to vary with the conversion fraction. In comparison with the KAS method, higher E values were obtained by the FWO method for all conversions considered. High CaO lignite was observed to have higher activation energy than the low CaO coal.

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Keywords

Technology, T, Science, Q, R, Temperature, Oxides, Calcium Compounds, Thailand, Coal Ash, Kinetics, Coal, Thermogravimetry, Medicine, Research Article

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