Steam-Oxygen Gasification of Potassium-Loaded Lignite: Proof of Concept of Type IV Gasification

Hua Yang, Shinji Kudo, Koyo Norinaga, Jun Ichiro Hayashi

研究成果: ジャーナルへの寄稿学術誌査読

10 被引用数 (Scopus)

抄録

An advanced type of gasification at atmospheric pressure, which is termed type IV gasification, has been proposed with potential performance to achieve a stand-alone cold gas efficiency over 95% lower heating value (LHV). This work aimed to prove the concept of type IV gasification of lignite. Continuous conversion of a Victorian lignite was simulated experimentally in a sequence of pyrolysis of potassium (K)-loaded lignite, vapor-phase steam-oxygen reforming of volatiles, and simultaneous steam reforming over the K-loaded char and its steam gasification. Systematic investigation of the effects of key operating variables on the process performance has reached their combination that realized steady-state carbon conversion of ∼100% together with tar concentration in the syngas of <30 mg Nm-3 dry. A suite of variables, K loading to the lignite of 3.3 wt % dry lignite, steam/carbon molar ratio of <0.8, oxygen/carbon molar ratio of <0.24, temperature for the pyrolysis of 600 °C, and char bed temperature for steam gasification/reforming of 750 °C, satisfied the requirement for type IV gasification.

本文言語英語
ページ(範囲)1616-1627
ページ数12
ジャーナルEnergy and Fuels
30
3
DOI
出版ステータス出版済み - 3月 17 2016

!!!All Science Journal Classification (ASJC) codes

  • 化学工学(全般)
  • 燃料技術
  • エネルギー工学および電力技術

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