Coal Characterisation for NOx Prediction in Air-Staged Combustion of Pulverised Coals

FUEL, Vol 84(17) (2005), pp. 2190-2195

Posted: 24 Jan 2020

See all articles by Chi Keung Man

Chi Keung Man

The Hang Seng University of Hong Kong

J.R. Gibbins

Imperial College London

J.G. Witkamp

DNV KEMA Energy and Sustainability

J. Zhang

Alstom

Date Written: 2005

Abstract

A series of world-traded coal samples has been tested using the Imperial College high temperature wire mesh apparatus (HTWM) in order to assess the relationship between high temperature (16008C) char nitrogen content and NOx formation in Hemweg Power Station (in the Netherlands) using deep furnace air staging. A linear relationship between high temperature char nitrogen and NOx formation has been confirmed. These results suggest that high temperature char N content is the main factor limiting NOx emissions with deep air-staged combustion. Char N and (hence apparently deep air-staged NOx) can be predicted with an accuracy of approximately G20% for most coals from the coal proximate and ultimate analysis—but this might not be sufficient for stations operating close to their emission limits. Measuring high temperature char N directly reduces the likely uncertainty in deep air-staged NOx emissions for coals (and most blends) to approximately G10%. Its use should be considered on a routine basis for coal selection on plants employing this technology.

Keywords: Overfire air; NOx prediction; High temperature; Devolatilisation

JEL Classification: M41

Suggested Citation

Man, Chi Keung and Gibbins, J.R. and Witkamp, J.G. and Zhang, J., Coal Characterisation for NOx Prediction in Air-Staged Combustion of Pulverised Coals (2005). FUEL, Vol 84(17) (2005), pp. 2190-2195. Available at SSRN: https://ssrn.com/abstract=3036743

Chi Keung Man (Contact Author)

The Hang Seng University of Hong Kong ( email )

Hang Shin Link
Siu Lek Yuen
Shatin, Hong Kong
China

J.R. Gibbins

Imperial College London ( email )

South Kensington Campus
Exhibition Road
London, Greater London SW7 2AZ
United Kingdom

J.G. Witkamp

DNV KEMA Energy and Sustainability

Energieweg 17
Groningen, 9743 AN
Netherlands

HOME PAGE: author3944354@ssrn.com

J. Zhang

Alstom ( email )

United Kingdom

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