Experimental study of NH3 and coal Co-firing in a CFB and its nitrogen conversion

Li, Kun; Cheng, Leming; Zhao, Xin; Wang, Bo; Zhang, Qingyu; Zhu, Leigang; Kang, Qixun; Ma, Zhangke

doi:10.1016/j.energy.2024.132156

Energy

2024

DOI: 10.1016/j.energy.2024.132156

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Experimental study of NH3 and coal Co-firing in a CFB and its nitrogen conversion

Kun Li,

Leming Cheng,

Xin Zhao

et al.

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Cited by 3 publications

References 43 publications

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Combustion characteristics on ammonia injection velocity and positions for ammonia co-firing with coal in a pilot-scale circulating fluidized bed combustor

Kim,

Pak,

et al. 2024

Applied Thermal Engineering

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Combustion characteristics on ammonia injection velocity and positions for ammonia co-firing with coal in a pilot-scale circulating fluidized bed combustor

Kim,

Pak,

et al. 2024

Applied Thermal Engineering

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Effect mechanism of coal gangue ash on NH3 oxidation in NH3 combustion condition

Liu,

Zhang,

Wang

et al. 2025

Fuel

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Experimental Study on NOx Generation and Slip NH3 Treatment in a Small Scale Coal-ammonia Co-firing System

Keel,

Jeon,

Lee

et al. 2024

KOSCO

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Ammonia, along with hydrogen, is a representative CO 2 free energy and co-firing of coal and ammonia is a direct means of suppressing greenhouse gas emissions. As an energy source, excessive generation of NOx, including NO, and the risk of air emissions of ammonia slip are important issues in the use of ammonia fuel. By analyzing the nitrogen oxide emission characteristics from a 5 kW lab. scale co-firing furnaces and deriving a stable treatment function for slip ammonia, we aim to provide basic data necessary for practical design. For this purpose, the NOx generation was checked according to various experimental factors such as ammonia co-firing ratio, air flowrate, ammonia injection point and oxidizer supply technique. There is no doubt that the increase of ammonia co-firing ratio is a factor in the increase of NO emission. However, NO can be stably controlled by combustion engineering methods such as air ratio, multi-stage supply of fuel and oxidizer. And separate supply of ammonia can suppress the generation of NO by inducing effects such as heat load reduction and high-temperature air combustion. Ammonia slip cannot occur in normal operation, but rather slip may occur due to the SCR reductant. In preparation for unexpected ammonia leakage, the installation of an ammonia oxidation catalyst was reviewed.

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Experimental study of NH3 and coal Co-firing in a CFB and its nitrogen conversion

Cited by 3 publications

References 43 publications

Combustion characteristics on ammonia injection velocity and positions for ammonia co-firing with coal in a pilot-scale circulating fluidized bed combustor

Combustion characteristics on ammonia injection velocity and positions for ammonia co-firing with coal in a pilot-scale circulating fluidized bed combustor

Effect mechanism of coal gangue ash on NH3 oxidation in NH3 combustion condition

Experimental Study on NOx Generation and Slip NH3 Treatment in a Small Scale Coal-ammonia Co-firing System

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