石炭の加熱過程における塩素の行方

DOI HANDLE Web Site Web Site 参考文献18件 オープンアクセス
  • 坪内 直人
    北海道大学大学院工学研究院附属エネルギー・マテリアル融合領域研究センター
  • 望月 友貴
    北海道大学大学院工学研究院附属エネルギー・マテリアル融合領域研究センター
  • 王 延輝
    東北大学多元物質科学研究所附属資源変換・再生研究センター
  • 大塚 康夫
    東北大学多元物質科学研究所附属資源変換・再生研究センター

書誌事項

タイトル別名
  • Fate of the Chlorine in Coal in the Heating Process
  • セキタン ノ カネツ カテイ ニ オケル エンソ ノ ユクエ

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<p>Pyrolysis of 29 coals with carbon contents of 71-92 mass% on a dry, ash-free basis (daf) has been performed mainly in a temperature-programmed mode at 10ºC/min up to 800ºC with a flow-type fixed bed quartz reactor, and some factors controlling HCl formation have been examined. The rate profiles of HCl formation exhibit at least three distinct peaks at around 260-360, 470-510 and 580-630ºC, and the lowest temperature peak is present for 8 coals alone, whereas the middle and highest temperature peaks are common with almost all of the coals. The HCl profile is also affected by the size of coal particles and the height of coal particles in the fixed bed. Yields of HCl and char-Cl at 800ºC for 28 coals except an American bituminous coal are 44-95 and 4-54%, respectively, and tar-Cl is as low as ≤ 7% in all cases. The chlorine distribution is almost independent of the heating rate in the range of 2.5-400ºC/min and has no distinct relationship with carbon or chlorine content in coal, but HCl tends to increase with increasing amount of (Na + 2Ca) in coal with a corresponding decrease in char-Cl. When an Indonesian sub-bituminous coal is injected into an O2-blown entrained bed gasifier under pressure, there is an almost 1:1 relationship between carbon and nitrogen conversions, whereas the sulfur and chlorine are enriched in the remaining char, and the degree of the enrichment is higher with chlorine. The method of evaluating coal-Cl forms quantitatively using model chlorine compounds is proposed.</p>

収録刊行物

  • 鉄と鋼

    鉄と鋼 103 (8), 443-450, 2017

    一般社団法人 日本鉄鋼協会

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