The Function of Halogen Additive in $CH_4/O_2/N_2$ Flames

$CH_4/O_2/N_2$ 화염에서 할로겐 첨가제의 역할

  • 이기용 (안동대학교 기계공학부) ;
  • 신성수 (안동대학교 기계공학부 대학원)
  • Published : 2003.12.12

Abstract

Numerical simulations are performed at atmospheric pressure in order to understand the effect of additives on flame speed, flame temperature, the radical concentration, the NOx formation in freely propagating $CH_4/O_2/N_2$ flames. The additives used are carbon dioxide and hydrogen chloride which have a combination of physical and chemical behavior on hydrocarbon flame. In the flame established with the same mole of methane and additive, $CO_2$ addition significantly contributes toward the reduction of flame speed and flame temperature by the physical effect, whereas addition of HCl mainly does by the chemical effect. The impact of HCl addition on the decrease of the radical concentration is about 1.6-1.8 times as large as $CO_2$ addition. Hydrogen chloride addition is higher on the reduction of EINO than $CO_2$ addition because of the chemical effect of HCl.

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