Fossil Energy. N2O Formation Mechanisms on Coal Combustion.

• Moritomi Hiroshi

  Thermal Energy and Combustion Engineering Department, National Institute for Resources and Environment

• Suzuki Yosizo

  Thermal Energy and Combustion Engineering Department, National Institute for Resources and Environment

• Ikeda Michitaka

  Mechanical Engineering Department, Faculty of Science and Engineering, Science University of Tokyo

• Suzuki Koichi

  Mechanical Engineering Department, Faculty of Science and Engineering, Science University of Tokyo

• Torigai Kin-ichi

  Mechanical Engineering Department, Faculty of Science and Engineering, Science University of Tokyo

Bibliographic Information

Other Title

• 特集　化石エネルギー利用技術　化石燃料燃焼における亜酸化窒素の生成機構
• カセキ ネンリョウ ネンショウ ニ オケル アサンカ チッソ ノ セイセイ キ

Abstract

Nitrous oxide (N₂O) is responsible for the global destruction of stratospheric ozone and for greenhouse warming. To explain N₂O emissions from coal at low combustion temperature, we have studied the mechanisms by using a batch reactor. In this paper, based on four formation sources, that is direct formation from char (Dc), indirect formation by homogeneous reaction with coal volatile, fast or first volatile (IMv), indirect formation by homogeneous reaction with char volatile, slow or second volatile (IMc) and indirect formation by heterogeneous reaction over char (IT), respective contributions to N₂O formation were evaluated by comparing the fuel nitrogen conversion to N₂O. Two coals and a petroleum coke were used as fuel. The contribution of char and volatiles to N₂O formation were elucidated by using the chars devolatilized at various temperature. The contributions of gas phase reactions and heterogeneous reactions were studied by using a short reactor to reduce the gas phase reactions. As a result, the contribution of Dc was estimated to be between 0%and 30% IMv between 20% and 30% and IMc between 40% and 70%. The contribution of IT was strongly dependent on NO concentration around char particles, which was about 20% in circulating fluidized bed combustion.

Journal

• KAGAKU KOGAKU RONBUNSHU

  KAGAKU KOGAKU RONBUNSHU 20 (6), 849-856, 1994

  The Society of Chemical Engineers, Japan

Keywords

• Combustion
• Fluidized Bed Combustion
• Nitric Oxide
• Nitrous Oxide
• Energy
• Environment

Details

• CRID: 1390282679487143936
• NII Article ID: 130000866173
• NII Article ID: 10003708570
• NII Book ID: AN00037234
• DOI: 10.1252/kakoronbunshu.20.849
• ISSN: 13499203
• ISSN: 0386216X
• NDL BIB ID: 3906323
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3906323
• Web Site: http://www.jstage.jst.go.jp/article/kakoronbunshu1975/20/6/20_6_849/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed