NOx emission analysis and flame stabilization of ammonia-hydrogen-air premixed flames

Presented on September 19, 2016 during the NH3 Fuel Conference 2016

Authors Hadi Nozari Arif Karabeyoğlu Koc University

Download this Presentation Download a PDF version of this presentation.

Abstract

Based on its well-known merits, ammonia has been gaining special attention as a potential renewable energy carrier which can be replaced in power generation units. One of the major challenges with ammonia as a fuel is NOx emission, which has a complex underlying chemical kinetics.

In an earlier chemical kinetics study by the authors, NOx formation sensitivity was thoroughly studied in a wide range of combustion conditions [Nozari & Karabeyoğlu, J.Fuel 2015]. As the next step, premixed ammonia-hydrogen-air flames are studied experimentally in standard temperature and pressure condition. Effects of some major influential parameters on NOx emission levels are investigated: equivalence ratio, ammonia mixture fraction, and temperature. NOx formation behavior as well as temperature profiles are analyzed in comparison with chemical kinetics results. We also apply SiC porous block as a practical and effective medium for ammonia-hydrogen flame stabilization as well as a promising way of reducing NOx. Proven to be an effective way of flame stabilization in some other fuels (eg, methane and hydrogen), it enhances the heat, momentum and mass transfer, increasing the flame speed which is specifically helpful for better stabilization of the flames with high ammonia fraction in the mixture. In addition, the high thermal conductivity of SiC porous blocks elevate the heat conduction from the flame zone to pre- and post-flame zones which accordingly decrease the thermal NOx due to the lower flame temperature.

Topics Ammonia Gas Turbine Emissions Testing Fuel Comparisons NOx Emissions Power Generation

Authors hadinozari@gmail.com arif@spg-corp.com

Madoqua Power2X webinar on Tuesday, November 26

Please join us for this informative webinar. Click here to register and get the details!

Annual Conference highlights industry advancements

It was an exciting three days in New Orleans with 300 attendees from 22 countries participating in our 21st AEA Annual Conference. Thank you to our generous sponsors and to all those who attended the conference. Stay tuned for a recap of the events and sessions. Presentations from all the sessions will be posted shortly.

Featured content

In 2023, AEA reached many milestones. Read about them in our 2023 Annual Report.