石炭中の窒素と硫黄の化学形態と乾留過程での分配

• 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

• 小野 洋平

  三菱化学（株）坂出事業所

• 上坊 和弥

  住友金属工業（株）総合技術研究所

書誌事項

タイトル別名

• Functional Forms of Nitrogen and Sulfur in Coals and Fate of Heteroatoms during Coal Carbonization
• セキタン チュウ ノ チッソ ト イオウ ノ カガク ケイタイ ト カンリュウ カテイ デ ノ ブンパイ

抄録

The functionalities of the nitrogen (coal-N) and sulfur (coal-S) present in three caking coals with carbon contents of 76-81 wt%-dry and the fate of these heteroatoms during coal carbonization have mainly been studied by the X-ray photoelectron spectroscopy (XPS) and with a fixed bed quartz reactor, respectively. The XPS measurements exhibit that about 80-90 % of the coal-N exists as pyrrolic-N and pyridinic-N, and the rest can be assigned to quaternary-N (pyridinic-N associated with the hydroxyl groups from phenols or carboxylic acids), whereas the coal-S consists of thiophenic-S, alkyl-S and FeS₂, and the proportion of the former is as high as 60-70 %. When the coal sample is carbonized in He at a heating rate of 3°C/min, yield of N-containing species observed at 1000°C increases in the order of HCN ≤ tar-N < NH₃ < N₂ < oil-N < coke-N, regardless of the type of coal, and the latter two are present predominantly as NH₄⁺ and in polynuclear aromatic structures, respectively. On the other hand, yield of S-containing species at 1000°C increases in the order of COS < CS₂ < tar-S < oil-S < H₂S < coke-S with all coals, and more than 95 % of the coke-S can be regarded as thiophenic-S. These tendencies are also observed with physical mixtures of each coal investigated. Possible mechanisms for the formation of gaseous N- or S-containing compounds in the carbonization process are discussed on the basis of the results of some thermodynamic calculations.

収録刊行物

• 鉄と鋼

  鉄と鋼 98 (5), 161-169, 2012

  一般社団法人 日本鉄鋼協会

キーワード

• coal
• nitrogen functionality
• sulfur functionality
• carbonization
• nitrogen distribution
• sulfur distribution

詳細情報

• CRID: 1390282680103108480
• NII論文ID: 130002127290
• NII書誌ID: AN00151251
• ISSN: 1341688X
• ISSN: 18832954
• ISSN: 00211575
• DOI: 10.2355/tetsutohagane.98.161
• COI: 1:CAS:528:DC%2BC38XntlWrsb4%3D
• HANDLE: 2115/79338
• NDL書誌ID: 023760586
• Web Site: http://id.ndl.go.jp/bib/023760586
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I023760586
• Web Site: https://www.jstage.jst.go.jp/article/tetsutohagane/98/5/98_5_161/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可