Title: Nitric oxide yield from combustion of a low calorific gasification product gas: numerical and experimental study

Authors: Anders Brink, Mikko Hupa, Esa Kurkela, Marjut Suomalainen

Addresses: Combustion and Materials Chemistry, Process Chemistry Centre, Abo Akademi University, Biskopsgatan 8, FIN-20500 Abo, Finland. ' Combustion and Materials Chemistry, Process Chemistry Centre, Abo Akademi University, Biskopsgatan 8, FIN-20500 Abo, Finland. ' VTT Processes, P.B. 1601, FI-02044 VTT, Finland. ' VTT Processes, P.B. 1601, FI-02044 VTT, Finland

Abstract: The nitrogen oxide yield in a combustor burning an ammonia rich product gas from a bubbling bed gasifier has been investigated. The measurements showed a surprisingly small effect of the excess air in the combustor on the NOx emissions. To understand the reason for this behaviour the nitrogen chemistry in the combustor has been studied using CFD combined with a detailed description of the fuel-N chemistry. With higher oxygen excess a NOx yield of 22% is calculated compared to a measured NOx yield of 21%. In the case with lower oxygen excess the corresponding numbers are 20% and 18%, respectively.

Keywords: fuel-nitrogen conversion; nitric oxide yield; gasification gas combustion; CFD modelling; computational fluid dynamics; biomass combustion.

DOI: 10.1504/PCFD.2006.010030

Progress in Computational Fluid Dynamics, An International Journal, 2006 Vol.6 No.4/5, pp.217 - 224

Published online: 09 Jun 2006 *

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