Nonisothermal Thermogravimetric Analysis of Thai Lignite with High CaO Content

作者：Pintana Pakamon; Tippayawong Nakorn^*

来源：The Scientific World Journal, 2013, 216975.

DOI：10.1155/2013/216975

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 degrees C min(-1) from ambient up to 1300 degrees 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.. 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.

• 出版日期2013