Combustion performance of Loy Yang lignite treated using microwave irradiation treatment

Xiangchun Liu, Taigen Masuyama, Tsuyoshi Hirajima, Moriyasu Nonaka, Keiko Sasaki

研究成果: Contribution to journalArticle査読

15 被引用数 (Scopus)

抄録

The combustion characteristics and activation energy of the microwave irradiation (MI) treated lignite were investigated by thermogravimetric analysis at different heating rates. Effects of the changes in physicochemical properties (amounts of volatile matter and fixed carbon, specific surface area, and pore volume) on the combustion performance were also discussed. The activation energy was calculated using the Kissinger–Akahira–Sunose isoconversional method. The results showed that ignition temperature of the MI treated samples increased significantly relative to that of raw lignite, and it gradually increased with increasing MI time, indicating that MI treatment decreases the reactivity of lignite, which progressively decreases as MI time increases. The maximum combustion rates of the treated samples were higher than that of raw lignite, suggesting that MI treatment modifies the combustion intensity of Loy Yang lignite. Moreover, the combustion processes of samples treated by MI for 5 and 7 min were single rate-limiting step kinetics, whereas raw lignite and samples treated by MI for 3 and 9 min followed multistep kinetics. Average activation energy for sample treated using MI for 5 min was the maximum value, and it decreased with further increasing MI time because of the increased effect of diffusion.

本文言語英語
ページ(範囲)81-87
ページ数7
ジャーナルThermochimica Acta
642
DOI
出版ステータス出版済み - 10 20 2016

All Science Journal Classification (ASJC) codes

  • 器械工学
  • 凝縮系物理学
  • 物理化学および理論化学

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