Maruta & Morii / Nakamura Lab

Global Collaborative Research and Education Center for Integrated Flow Science, Institute of Fluid Science, Tohoku University, Maruta & Morii / Nakamura Lab

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Last update:Mar. 30, 2020

Ammonia combustion

Ammonia is a promising energy carrier to reduce CO2 emission in production, storage, transportation and utilization of energy. Ammonia enables to be produced from renewable energy sources, to be stored and carried in liquefied gas, to produce hydrogen on site by reformation, and to be utilized in combustor without CO2 emission. Various researches and developments are under way for future systems with energy carriers. To develop practical large-scale combustors using ammonia as a fuel, reaction model of ammonia combustion is an essential fundamental. However, validation of reaction model of ammonia combustion is difficult to be conducted because of quite low reactivity of ammonia for fundamental experimental apparatus.

This project aims to develop accurate reaction model of ammonia combustion. To validate the model performance for predicting ammonia ignition, a micro flow reactor with a controlled temperature profile which enables to be applied for low-reactivity fuels and a mass spectrometer with an in-situ infinitesimal sampling are used. In addition, validation of NOx reduction reactions is conducted to reduce NOx emission formed from nitrogen atom in ammonia by ammonia itself. There fundamental studies are essential to design and develop an ultimate combustor which produces only nitrogen and water.

The developed model in CHEMKIN format can be downloaded here.

Projects participated:SIP "Energy carrier", JST-PRESTO (Sakigake) "Energy carriers"

  Examples of Ammonia flames in the micro flow reactor (left) and the micro flow reactor with a quartz micro sampling probe (right)

Related references

  • 104.

    Hisashi Nakamura, Mitsumasa Shindo, Effects of radiation heat loss on laminar premixed ammonia/air flames, Proceedings of The Combustion Institute, Vol. 37, Issue 2: 1741-1748 (2019). doi:10.1016/j.proci.2018.06.138

  • 98.

    Hisashi Nakamura, Susumu Hasegawa, Takuya Tezuka, Kinetic modeling of ammonia/air weak flames in a micro flow reactor with a controlled temperature profile, Combustion and Flame, Vol. 185: 16-27 (2017). doi:10.1016/j.combustflame.2017.06.021

  • 95.

    Hisashi Nakamura, Susumu Hasegawa, Combustion and ignition characteristics of ammonia/air mixtures in a micro flow reactor with a controlled temperature profile, Proceedings of the Combustion Institute, Vol. 36: 4217-4226 (2017). doi:10.1016/j.proci.2016.06.153

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