NOx emission of two-stage combustor for ammonia/natural gas Co-fired gas turbine

Shintaro Ito, Masahiro Uchida, Toshiro Fujimori, Hideaki Kobayashi

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)

Abstract

Development of low NOx combustor is crucial for the use of ammonia as fuel for gas turbines. In this paper, the effect of primary zone equivalence ratio and secondary ammonia injection are investigated for a two-stage combustor by computation, rig testing and engine testing. Computational results of simple reactor network model show that NOx emission takes a minimum around a primary equivalence ratio of 1.4, when secondary ammonia mixing ratio is 0%. Contrarily, NOx emission monotonically increases with increasing primary zone equivalence ratio, when secondary ammonia mixing ratio is 100%. Results of rig tests are qualitatively consistent for secondary ammonia mixing ratio of 0%. In case of 100% secondary ammonia injection, however, much lower NOx emissions than predicted are measured, with a minimal value around a primary equivalence ratio of 0.9. In engine tests, lower NOx emissions are achieved with a diffusion flame burner, compared to a lean premixed burner, although equivalence ratios are 0.85 and 0.65, respectively. These results are qualitatively consistent with rig test results and reveal the importance of primary zone equivalence ratio and secondary ammonia injection in design of low NOx combustor.

Original languageEnglish
Publication statusPublished - 2019 Jan 1
Event12th Asia-Pacific Conference on Combustion, ASPACC 2019 - Fukuoka, Japan
Duration: 2019 Jul 12019 Jul 5

Conference

Conference12th Asia-Pacific Conference on Combustion, ASPACC 2019
Country/TerritoryJapan
CityFukuoka
Period19/7/119/7/5

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Energy Engineering and Power Technology
  • Fuel Technology
  • Condensed Matter Physics

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