2023 Fiscal Year Final Research Report
Development of ammonia burner for simultaneous high-intensity combustion and NOx reduction
| Project/Area Number |
19K04219
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 19020:Thermal engineering-related
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| Research Institution | Kagawa University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2024-03-31
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| Keywords | 新燃料 / アンモニア / 高負荷燃焼 / NOx |
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| Outline of Final Research Achievements |
The main cause of global warming is carbon dioxide generated by the combustion of fossil fuels. The Japanese government is aiming to achieve decarbonization by 2050 and is focusing on the new fuel ammonia (383 kJ/mol-NH3). However, compared to conventional petroleum-derived hydrocarbon fuels, there are still many unknowns about its combustion mechanism. In this study, we aimed to clarify the combustion mechanism of the new-fuel ammonia and achieve high-load combustion (increasing the amount of heat generation per unit volume). This high-load combustion will enable to be made more compact in boiler design, and also contributes directly to minimizing the size of heat transfer equipment, increasing heat transfer efficiency, and energy-saving technology. We had conducted on developing a burner under a new concept.
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| Free Research Field |
熱工学
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| Academic Significance and Societal Importance of the Research Achievements |
工場ではアンモニアを水素用途のみではなく，直接的に熱利用（燃料：エネルギーキャリア）として併用利用することが実用的観点から望まれる．アンモニアはCO2を排出しない，すなわち地球温暖化ガス(CO2)の排出がゼロの燃料である．しかしながら，アンモニアの層流燃焼速度は7.0cm/s以下であり，従来の石油系燃料と比較すると低いために安定燃焼が困難である．かつ，強制的に燃焼させると大量の窒素酸化物(NOx)を生成する．そこで本研究では，この難燃性のNH3を安定に高負荷燃焼させ，かつNOxを同時低減できるバーナーを開発した．加えて，NH3火炎（新燃料）からのNOx低減のメカニズムを学術的に明らかにした．
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