Modeling NOx release from a single coal particle I. Formation of NO from volatile nitrogen

Visona S.P. and Stanmore B.R. (1996) Modeling NOx release from a single coal particle I. Formation of NO from volatile nitrogen. Combustion and Flame, 105 1-2: 92-103.

Author Visona S.P.
Stanmore B.R.
Title Modeling NOx release from a single coal particle I. Formation of NO from volatile nitrogen
Journal name Combustion and Flame   Check publisher's open access policy
ISSN 0010-2180
Publication date 1996-01-01
Sub-type Article (original research)
Open Access Status Not yet assessed
Volume 105
Issue 1-2
Start page 92
End page 103
Total pages 12
Language eng
Subject 2102 Curatorial and Related Studies
2103 Historical Studies
2200 Engineering
2210 Mechanical Engineering
Abstract For a single spherical coal particle, modeling has been undertaken of the processes of release of volatile fuel-nitrogen, and its subsequent conversion to nitric oxide during the devolatilization. The combustion conditions used were similar to those found in utility boilers. A finite volume numerical scheme was used to solve the equations of mass, species conservation, momentum and heat transfer about the devolatilizing particle. Particles in the size range 10-100 μm were modeled with gas temperatures from 1250 to 1900 K. Devolatilization was described by two competing reactions; results are compared with other single particle models and experimental results reported in the literature. The influence of coal rank was examined by using a lignite, a sub-bituminous and a high volatile bituminous coal. The conversion efficiencies of volatile fuel-nitrogen to nitric oxide are presented. It was found that there can be a significant conversion of the volatile fuel-nitrogen to nitric oxide before the liberated volatiles have reached the oxygen supply in the bulk gas. Conversion efficiencies of volatile nitrogen to nitric oxide as high as 54% are predicted for conditions of high gas temperature and high oxygen concentrations. For small particles (≈10 μm), most of the fuel-nitrogen is released as hydrogen cyanide (up to 70%) prior to mixing with the bulk gas.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 30 Aug 2016, 14:08:04 EST by System User