Nonisothermal thermogravimetric analysis of Thai lignite with high CAO content
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...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
2014
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| Online Access: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84887417182&partnerID=40&md5=babb5158bbebe0b67fec5fc7420f7577 http://cmuir.cmu.ac.th/handle/6653943832/1653 |
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| Institution: | Chiang Mai University |
| Language: | English |
| Summary: | 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. © 2013 Pakamon Pintana and Nakorn Tippayawong. |
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