Influence of H2O on NO formation during char oxidation of biomass

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Oskar Karlström, Hao Wu, Peter Glarborg
Publisher: Elsevier
Publication year: 2019
Journal: Fuel
Volume number: 235
Start page: 1260
End page: 1265


The present study investigates conversion of char-N to NO in mixtures of O2/N2 and in O2/H2O/N2. Biomass particles of spruce bark were combusted in an electrically heated single particle reactor at 900 °C at various O2/H2O/N2 concentrations. NO concentrations of the product gases were measured during the char combustion stage. The conversion of char-N to NO was significantly higher with H2O as compared to without H2O in the gas. Additional fixed bed experiments were conducted to investigate the products of the reaction between H2O and spruce bark char. The results showed that NH3
is the primary product in the reaction between char-N and steam. These
results explain the observation that more NO is formed during char
combustion in the presence of steam: the char-N reacts partly with H2O to form NH3, which reacts further to NO.

Last updated on 2020-13-07 at 04:09