메탄 및 암모니아를 포함하는 석탄 합성가스의 NOx 발생 특성

이찬; Chan Lee

Clean Technology, Vol.14, No.2, 117-122, June, 2008

Export Citation

메탄 및 암모니아를 포함하는 석탄 합성가스의 NOx 발생 특성

NOx Formation Characteristics of the Coal-derived Synthetic Gas Containing CH4 and NH3 Components

이찬^†

수원대학교 기계공학과, 445-743 경기도 화성시 봉담읍 와우리 산 2-2

Chan Lee^†

Department of Mechanical Engineering, University of Suwon, San 2-2, Wau Ri, Bongdam Eup, Hwaseong City, Gyeonggi-do 445-743, Korea

E-mail:

초록

중발열량 석탄 합성가스의 연소 및 NOx 발생 특성에 대한 이론적 해석을 수행하였다. 석탄 합성가스는 CO, H2, CO2, N2가 주성분이고, 미량의 CH4 및 NH3를 함유하는 것으로 가정하였다. 열화학적 해석을 통해 합성가스 연소 시의 화염 온도, 배기가스의 주요 및 부차적 화학종들의 조성, 열 및 연료 NOx 발생량을 계산하였다. 또한 합성가스 중의 CH4 및 NH3 성분이 연소 및 NOx 발생에 미치는 영향을 검토하였다. 본 석탄 합성가스들의 계산결과들을 토대로 가스터빈 연소기의 NOx 저감 설계에 필요한 기본 방향과 기준을 제시하였다.

Theoretical analysis was conducted on the combustion and the NOx formation characteristics of the coal-derived synthetic gases with medium-BTU heating value. The synthetic gas was assumed to contain the major species of CO, H2, CO2, and N2 and the minor species of CH4 and NH3. Through thermochemical analysis on the combustion of the synthetic gas, the flame temperature, major and minor species of exhaust gas, and thermal and fuel NOx emissions were computed. In addition, the effects of the CH4 and the NH3 components in syngas fuel on combustion and NOx emission were investigated. Based on the computed results on the synthetic gases, basic direction and guidelines were provided for the low NOx design of gas turbine combustor.

Keywords:Coal-derived synthetic gas;Chemical equilibrium;Flame temperature;NOx emission;NH3 conversion

[References]

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[1] Cook CS, Corman JS, Todd DM, ASME J. Eng. Gas Turb. Power, 117, 673 (1995)

[2] Precision Combustion Inc., "Sytem Study of Rich Catalytic/Lean Burn(RCL) Catalytic Combustion for Natural Gas and Coal-Derived Syngas Combustion Turbines," DOE report DEFG26-02NT41521 (2004)

[3] Giles DE, Som S, Aggarwal SK, Fuel, 85, 1729 (2006)

[4] Kelsall GJ, Smith MA, Cannon MF, ASME J. Eng. Gas Turb. Power, 116, 559 (1994)

[5] Nakata T, Et AL, ASME J. Eng. Gas Turb. Power, 118, 534 (1996)

[6] Dobbeling K, Et AL, ASME J. Eng. Gas Turb. Power, 118, 46 (1996)

[7] Liebner W, Zwiefelhofer U, Vierrath H, Seifert W, Lurgi's MPG and BGL Gasifier at SVZ Schwartze Pumpe: Status & Experiences in IGCC Application," '99 Gasification Technologies Conference (1999)

[8] http://navier.engr.colostate.edu

[9] Hautman DJ, Dryer FL, Schug KP, Glassman I, Combust. Sci. Technol., 25, 219 (1981)

[10] Westbrook CK, Dryer FL, Combust. Sci. Technol., 27, 31 (1981)

[11] Stephen RT, An Introduction to Combustion, McGraw-Hill (1999)

[12] Lindstedt RP, Selim MA, Combust. Sci. Technol., 99, 277 (1994)

[13] Lee C, Kim YC, Kim HT, '99 ACS Meeting, IGCC Symposium (1999)