Numerical Simulation of Combustion of Natural Gas Mixed with Hydrogen in Gas Boilers

Yue Xin, Ke Wang, Yindi Zhang, Fanjin Zeng, Xiang He, Shadrack Adjei Takyi and Paitoon Tontiwachwuthikul
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Yue Xin: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Ke Wang: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Yindi Zhang: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Fanjin Zeng: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Xiang He: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Shadrack Adjei Takyi: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Paitoon Tontiwachwuthikul: Faculty of Engineering and Applied Science, Clean Energy Technologies Research Institute (CETRI), University of Regina, Regina, SK S4S 0A2, Canada

Energies, 2021, vol. 14, issue 21, 1-15

Abstract: Hydrogen mixed natural gas for combustion can improve combustion characteristics and reduce carbon emission, which has important engineering application value. A casing swirl burner model is adopted to numerically simulate and research the natural gas hydrogen mixing technology for combustion in gas boilers in this paper. Under the condition of conventional air atmosphere and constant air excess coefficient, the six working conditions for hydrogen mixing proportion into natural gas are designed to explore the combustion characteristics and the laws of pollution emissions. The temperature distributions, composition, and emission of combustion flue gas under various working conditions are analyzed and compared. Further investigation is also conducted for the variation laws of NOx and soot generation. The results show that when the boiler heating power is constant, hydrogen mixing will increase the combustion temperature, accelerate the combustion rate, reduce flue gas and CO 2 emission, increase the generation of water vapor, and inhibit the generation of NOx and soot. Under the premise of meeting the fuel interchangeability, it is concluded that the optimal hydrogen mixing volume fraction of gas boilers is 24.7%.

Keywords: hydrogen-blended combustion; numerical simulation; combustion characteristics; pollutant generation; flue gas analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (9)

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