Characteristic analyses of gasification and combustion of different coal samples in CO 2-enriched and recycled flue gases atmosphere by rapid heating: Effects of O 2 concentration and H 2O

Z. Li, X. Zhang, K. Saski, Y. Sugai, J. Wang

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

Combustion and gasification of pulverized coal have been investigated experimentally for the conditions under high temperature gradient and CO 2-rich atmospheres with 5% and 10% O 2. Crushed coal samples were heated rapidly by a CO 2 gas laser beam to give a high temperature gradient of order 100°C s -1 in order to simulate radiation heat transfer conditions expected in coal gasification furnaces. The rapid heating is able to minimize effects of coal oxidation and combustion compared with previous studies with a TG-DTA that requires much longer time to heat up with oxidation effect. Moreover, coal-water mixture samples with different water/coal mass ratio were used in order to investigate roles of water vapor on the combustion and gasification. The experimental results indicated that coal weight reduction ratio or coal conversion ratio to gases follows the Arrhenius equation with increasing coal temperature; in addition, coal weight reduction ratio of the sample was increased around 5% with adding H 2O in CO 2-rich atmosphere. Furthermore, generations of CO gas and Hydrocarbons gases (HCs) were mainly dependent on coal temperature and O 2 concentration, however, those are also affected by chemical reactions including H 2O. Especially, reactions generating CO and HCs gases were stimulated at temperature over 1000°C in the CO 2-rich atmosphere with 5% O 2.

本文言語英語
ホスト出版物のタイトルSociety of Petroleum Engineers - Carbon Management Technology Conference 2012
ページ504-511
ページ数8
出版ステータス出版済み - 5 18 2012
イベントCarbon Management Technology Conference 2012 - Orlando, FL, 米国
継続期間: 2 7 20122 9 2012

出版物シリーズ

名前Society of Petroleum Engineers - Carbon Management Technology Conference 2012
1

その他

その他Carbon Management Technology Conference 2012
Country米国
CityOrlando, FL
Period2/7/122/9/12

All Science Journal Classification (ASJC) codes

  • Industrial and Manufacturing Engineering
  • Media Technology
  • Environmental Science(all)

フィンガープリント 「Characteristic analyses of gasification and combustion of different coal samples in CO <sub>2</sub>-enriched and recycled flue gases atmosphere by rapid heating: Effects of O <sub>2</sub> concentration and H <sub>2</sub>O」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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