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Experimental analysis of CO/H2 syngas with NOx and SOx reactions in pressurized oxy-fuel combustion

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  • Kim, Donghee
  • Ahn, Hyungjun
  • Yang, Won
  • Huh, Kang Y.
  • Lee, Youngjae

Abstract

A pressurized oxy-fuel combustion system is a technology for carbon capture and storage with a low efficiency penalty. In this study, the characteristics of combustion, heat transfer, and NOx/SOx emissions at various pressures were investigated using a lab-scale pressurized oxy-fuel combustion system. A gaseous fuel, composed of CO and H2, and pure oxygen were considered. The internal flue gas recirculation was induced by the inner wall to control the high oxy-flame temperature. The total heat recovery rate determined using the water jacket is 3% higher at 10 barg compared with atmospheric conditions, although the combustion temperature is lower. The heat flow rate increased by a higher H2O fraction in flue gas because the emissivity of H2O is higher than that of CO2. Under the condition of low H2O in flue gas, NOx and SOx simultaneously decreased, by approximately 50% and 63% at 10 barg, respectively. The concentrations of NOx and SOx with a higher H2O contents condition in flue gas decreased by 87% and 93% respectively at 10 barg, compared with atmospheric conditions. The effects of H radicals and the H2O fraction on the NOx and SOx oxidation and decrease were identified.

Suggested Citation

  • Kim, Donghee & Ahn, Hyungjun & Yang, Won & Huh, Kang Y. & Lee, Youngjae, 2021. "Experimental analysis of CO/H2 syngas with NOx and SOx reactions in pressurized oxy-fuel combustion," Energy, Elsevier, vol. 219(C).
    • Handle: RePEc:eee:energy:v:219:y:2021:i:c:s0360544220326578
    DOI: 10.1016/j.energy.2020.119550
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    References listed on IDEAS

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    Cited by:

    1. Long Zhang & Shanshan Zhang & Hua Zhou & Zhuyin Ren & Hongchuan Wang & Xiuxun Wang, 2022. "Efficient Combustion of Low Calorific Industrial Gases: Opportunities and Challenges," Energies, MDPI, vol. 15(23), pages 1-14, December.
    2. Kim, Donghee & Yang, Won & Huh, Kang Y. & Lee, Youngjae, 2021. "Demonstration of 0.1 MWth pilot-scale pressurized oxy-fuel combustion for unpurified natural gas without CO2 dilution," Energy, Elsevier, vol. 223(C).

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