Open AccessNumerical investigation of fuel flexibility in a small-scale flameless combustor
Author(s) -
P Rijo,
Pedro J. Coelho
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2116/1/012017
Subject(s) - combustor , syngas , combustion , biogas , methane , natural gas , waste management , materials science , fuel gas , chemistry , hydrogen , organic chemistry , engineering
Numerical simulation of a laboratory flameless combustor was performed to investigate the flexibility to burn alternative fuels to natural gas. The studied fuels are biogas, syngas and a mixture of ammonia and methane. The inlet temperatures of air and fuel, the equivalence ratio and the geometrical characteristics of the combustor were maintained constant. The results show that flameless combustion is observed in the biogas and in the NH 3 /CH 4 mixture, while the syngas burns according to the conventional non-premixed combustion mode. According to the predictions, the biogas emits 1.1 ppm of NO x and 229 ppm of CO, syngas produces 7.8 ppm of NO x and 35 ppm of CO and the NH 3 /CH 4 mixture emits about 3900 ppm of NO x and 608 ppm of CO. The high NO x and CO emissions in the NH 3 /CH 4 mixture show that the combustor needs to be optimized to burn a nitrogen-containing fuel.