Title:
Reducing the Fuel-Bound Nitrogen Conversion to NO in an Air-Staged Combustion of a Synthetic Biomass-derived Gas
Author(s):
Adouane, B., de Jong, W., van Buijtenen, J.P., Witteveen, G.
Document(s):
Paper
Abstract:
Fuel bound nitrogen (FBN) content in the biomass-derived LCV (Low Calorific Value) gas compromises the neutral aspect of biomass gas regarding CO2 emissions. These because the FBN once in the combustion chamber will mainly form NO. Many approaches are applied to reduce the conversion of FBN to NO; these approaches could be applied upstream of the combustion chambers, like wet scrubbing or downstream using selective or non selective catalytic reduction, or optimizing the combustion process itself to result in the lowest possible conversion of FBN to NO. In this paper the last approach is adopted, where a newly designed combustor fueled with synthetic biomass-derived gas was tested and modeled at the section of Energy Technology, Delft University. The LCV gas is made in a mixing station, from the main components of Biomass gas, ammonia is added to the LCV gas to simulate the presence of fuel bound nitrogen. The aim of the experiments is to find out an optimal combustion regime resulting in lowering the conversion of FBN to NO and thus lowering net NOx emissions. In addition to the experimental work, a model of the combustor is built in Chemkin to simulate the combustion process. As low as 5% conversion of FBN to NO was achieved at the optimum point and a good agreement was found between the experimental and simulation results The experimental and the model results are presented in this paper showing the potential of primary measures in reducing NOx emissions from FBN
Keywords:
combustion, NOx, LCV gas
Topic:
Thermochemical conversion - Combustion and co-combustion
Subtopic:
Prediction and abatement of corrosion and gas emissions in large biomass combustion and co-firing plants
Event:
18th European Biomass Conference and Exhibition
Session:
OA5.5
Pages:
1113 - 1116
ISBN-13:
978-88-89407-56-1
ISBN-10:
88-89407-56-5
Paper DOI:
10.5071/18thEUBCE2010-OA5.5
Price:
FREE
