Session: 04-29 Emissions hydrogen/ammonia II

Paper Number: 128810

128810 - Investigation of NO-Formation in Humid, Ammonia-Doped Combustion 

The decarbonization of the energy sector is promoting the utilization of alternative fuels such as hydrogen and syngas from bio-waste. Their conversion to power and heat can be realized in humid, fuel-flexible gas turbine cycles, such as the biomass-fired Top Cycle, which show a significant potential in the energy market of the near future. TU Berlin and Phoenix BioPower are developing the combustion system for such a cycle, using a double swirler and thus injecting a fuel/steam mixture and air through individual swirler into the combustion chamber. In a previous study, this burner showed promising results regarding fuel switch capabilities from pure natural gas to pure hydrogen, NOx-emissions and flame stability. 

The current work investigates the Double Swirler’s emission behavior in further detail. A kinetic NOx-model is implemented and validated with experimental data. The impact of mixing on NOx-formation under humid conditions based on the burner’s flow and operation condition is evaluated. The model is used to analyze NOx-formation over a fuel switch from natural gas to hydrogen. The impact of small quantities of fuel-bound nitrogen associated with syngas produced from biomass on NOx-emission is assessed. Natural gas doped with ammonia representing fuel-bound nitrogen is combusted under steam-rich conditions and NOx-formation is modelled by applying the kinetic model.

The model is used to predict engine conditions at elevated pressures and serves as a design tool to lay out the combustor geometry for fuels containing NH3 with respect to size and combustion regime. The results vary substantially from the design rules for DLN combustion.

Presenting Author: Simeon Dybe Technical University Berlin

Presenting Author Biography: Simeon Dybe has several years of work experience in a combustion research group and currently does his PhD on the analysis and advancement of fuel flexible gas turbine cycles with a focus on experimental investigation of the combustion process in these cycles.

Authors:

Simeon Dybe Technical University Berlin
Hannah Helbig Technical University Berlin
Muhammad Yasir Technical University Berlin
Felix Güthe Phoenix BioPower
Reddy Alemela Phoenix BioPower
Michael Bartlett Phoenix BioPower
Christian Oliver Paschereit Technical University Berlin
Myles D. Bohon Technical University Berlin