Modeling study of homogeneous NO and N2O formation from oxidation of HCN in a flow reactor

Masakazu Shoji, Tsuyoshi Yamamoto, Shoji Tanno, Hideyuki Aoki, Takatoshi Miura

Research output: Contribution to journalArticle

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Abstract

To investigate the reaction chemistry of HCN oxidation, a modeling study was performed. The plug flow calculation code was used at atmospheric pressure in the temperature range from 1000 to 1400 K. The effect of initial H 2O concentrations and that of other components were discussed. The oxidation of HCN is controlled primarily by the HCN + OH reaction in case of increasing H2O concentration. The oxidation of HCN starts at lower temperatures and the conversion of HCN to NO is inhibited by increase in H 2O concentration. N2O formation by the NCO + NO reaction is inhibited by increase in H2O concentration because of the small amount of NO and NCO. In the presence of initial NO, NCO acts as a reducing agent for NO. NCO mainly reacts with initial NO, so N2O formation is not affected by H2O concentration. In case of adding CO, CO oxidation chemistry acts as a source of a radical pool, and HCN oxidation shifts to lower temperatures. Increasing H2O affects, the consumption of O radical and inhibits NO formation. The effect of H2O concentration on N 2O formation is small because of the number of O and H radicals formed by CO oxidation.

Original languageEnglish
Pages (from-to)337-345
Number of pages9
JournalEnergy
Volume30
Issue number2-4 SPEC. ISS.
DOIs
Publication statusPublished - Jan 1 2005
Externally publishedYes

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Oxidation
Reducing agents
Temperature
Atmospheric pressure

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

Cite this

Modeling study of homogeneous NO and N2O formation from oxidation of HCN in a flow reactor. / Shoji, Masakazu; Yamamoto, Tsuyoshi; Tanno, Shoji; Aoki, Hideyuki; Miura, Takatoshi.

In: Energy, Vol. 30, No. 2-4 SPEC. ISS., 01.01.2005, p. 337-345.

Research output: Contribution to journalArticle

Shoji, Masakazu ; Yamamoto, Tsuyoshi ; Tanno, Shoji ; Aoki, Hideyuki ; Miura, Takatoshi. / Modeling study of homogeneous NO and N2O formation from oxidation of HCN in a flow reactor. In: Energy. 2005 ; Vol. 30, No. 2-4 SPEC. ISS. pp. 337-345.
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