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Experimental study of fuel-lean reburn system for NOX reduction and CO emission in oxygen-enhanced combustion

Authors

  • Hak Young Kim,

    Corresponding author
    1. Propulsion and Combustion Laboratory School of Mechanical, Aerospace and System Engineering, Division of Aerospace Engineering, Korea Advanced Institute of Science and Technology, 373-1 Gusong-Dong, Yusung-Gu, Daejeon 305-701, Korea
    • Division of Aerospace Engineering, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 373-1 Gusung-Dong, Yusung-Gu, Daejeon 305-701, Korea
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  • Seung Wook Baek

    1. Propulsion and Combustion Laboratory School of Mechanical, Aerospace and System Engineering, Division of Aerospace Engineering, Korea Advanced Institute of Science and Technology, 373-1 Gusong-Dong, Yusung-Gu, Daejeon 305-701, Korea
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    • Professor.


Abstract

A fuel-lean reburn system is found here to be able to replace a conventional reburning technique in terms of increasing efficiency. In the fuel-lean reburn system, the amount of injected reburn fuel into the reburning zone is low enough to maintain the overall fuel-lean condition in the furnace, so that no additional air system is required, and CO emission can be maintained at almost zero level. In this study, an experimental study has been done to examine the reduction characteristics of NOX in a lab scale combustor (15 kW) with various oxygen-enhanced combustion conditions. Liquefied Petroleum Gas (LPG) was used as a main fuel and reburn fuel. Finally, the current fuel-lean reburn system, even with only an amount of reburn fuel of 13% of total heat input, was observed to achieve a maximum of 48% in NOX reduction. Copyright © 2010 John Wiley & Sons, Ltd.

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