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2024 Vol.29, Issue 4 Preview Page

Research Article

Carbon Free NH3 Co-firing Behavior in Fluidized Bed Reactor: Effect of Blending Ratio and Stoichiometric Ratio

유동층 반응기 내 탄소 중립 NH3 혼소 특성: 혼소율 및 Stoichiometric ratio의 영향

Jae-Sung Kim1
,
Min-Woo Kim1
,
Kyeong-Ho Kim1
,
Haotian Ma1
,
Seung-Mo Kim2
,
Byoung-Hwa Lee2
,
Chung-Hwan Jeon12†
김 재성1
,
김 민우1
,
김 경호1
,
마 하오톈1
,
김 승모2
,
이 병화2
,
전 충환12†
1School of Mechanical Engineering, Pusan National University,
2Pusan Clean Energy Research Institute
1부산대학교 기계공학부
2부산대학교 청정화력발전에너지연구소
*Corresponding Author
31 December 2024. pp. 61-70
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Abstract

NH3, as one of the carbon-free fuels, is emerging as a new energy source for power generation. NH3 is being partially introduced into thermal power plants, accelerating its practical application as a fuel. In this study, experiments are conducted to apply NH3 in circulating fluidized bed(CFB) boilers. The objective of this research is to investigate fundamentally the effects of NH3 co-firing ratios(0-50%) and the stoichiometric ratio(SR) on combustion and various exhaust emissions to derive the optimal conditions for NH3 co-firing with coal using a bubbling fluidized bed(BFB) reactor. Results indicate that as the NH3 co-firing ratio increased, the emission values of CO2 and SO2 generated from coal combustion decreased. as the NH3 co-firing ratio increase up to 30~40%, the NOx gradually increase while higher co-firing ratio result in lower NOx value because unburned NH3 remaining in the reducing zone contribute to NOx reduction by selective non-catalytic reduction(SNCR) reactions. Furthermore NH3 should be injected into an appropriate reducing zone with a low SR for effective NOx reduction.

Keywords
NH3 co-firing
NH3 cofiring ratio
Stoichiometric ratio
NO emission
Bubbling fluidized bed
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Information
  • Publisher :The Korean Society of Combustion
  • Publisher(Ko) :한국연소학회
  • Journal Title :Journal of the Korean Society of Combustion
  • Journal Title(Ko) :한국연소학회지
  • Volume : 29
  • No :4
  • Pages :61-70
  • Received Date : 2024-10-16
  • Revised Date : 2024-11-22
  • Accepted Date : 2024-11-22
  • DOI :https://doi.org/10.15231/jksc.2024.29.4.061
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