천연망간광석 SCR 반응에서 수분의 영향

김성수; 홍성창; Sungsu Kim; Sungchang Hong

Journal of the Korean Industrial and Engineering Chemistry, Vol.18, No.4, 350-355, August, 2007

Export Citation

천연망간광석 SCR 반응에서 수분의 영향

The effect of moisture on SCR reaction of NMO (Natural Manganese Ore)

김성수 , 홍성창 ^†

경기대학교 환경공학과

Sungsu Kim , and Sungchang Hong^†

Department of Environmental Engineering, Kyonggi University, Gyeonggi-do 442-760, Korea

E-mail:

초록

천연망간광석을 이용한 질소산화물의 선택적촉매환원 반응에서 배가스 내에 포함된 수분의 영향을 연구하였다. 실험은 천연망간광석 촉매상에서 NO와 NH3의 반응을 독립 또는 동시에 반응시켰다. 천연망간광석 촉매의 격자산소를 통하여 저온에서 NH3가 산화될 수 있으며, NH3의 산화로 인하여 생긴 NO 및 NO2의 농도는 수분이 없을 때보다 수분이 존재할 때에 300 ℃ 이상 고온에서 더 높게 나타났다. 수분은 천연망간광석 촉매상에서 NO 및 NH3와 경쟁흡착하며, 이것은 고온 및 저온에서의 선택적촉매환원 반응을 저해하는 요인으로 작용할 수 있다. 촉매제조시 dipping한 수분도 NH3와 경쟁흡착을 하여 250 ℃ 이하에서 NOx 전환율이 감소하였다. NMO는 소성온도별로 활성특성이 달라지고 수분의 유무에 관계없이 400 ℃의 최적소성온도를 갖는다.

The effect of moisture in flue gas on SCR reaction of NMO (Natural Manganese Ore) was studied. The experiments were performed over NMO with NO, NH3 at independent condition or simultaneous condition. NH3 can be oxidized at low temperature by the lattice oxygen in NMO catalyst. The concentration of NO and NO2 by NH3 oxidation with moisture is higher above 300 ℃ than that without moisture. Moisture would competitively adsorb with NO and NH3 on NMO catalyst. It caused poor NOx conversion to compete against H2O. Besides the NOx conversion efficiency was reduced at below 250 ℃ because of the dipped H2O competitively adsorbed NH3. The reactivity of NMO varied with the calcination temperature and the optimum calcination temperature was 400 ℃ regardless H2O.

Keywords:NMO;SCR;moisture

[References]

Heck RM, Catal. Today, 53(4), 519 (1999)
Singoredjo L, Kover R, Kapteijn F, Moulijn J, Appl. Catal. B: Environ., 1, 297 (1992)
Jehng JM, Deo G, Weckhuysen BM, Wachs IE, J. Mol. Catal. A-Chem., 110, 41 (1996)
Turco M, Lisi L, Pirone R, Ciambelli P, Appl. Catal. B: Environ., 3(2-3), 133 (1994)
Duffy BL, Curryhyde HE, Cant NW, Nelson PF, J. Phys. Chem., 98(29), 7153 (1994)
Duffy BL, Curryhyde HE, Cant NW, Nelson PF, Appl. Catal. B: Environ., 5(1-2), 133 (1994)
Odenbrand CUI, Gabrielsson LT, Brandin JGM, Appl. Catal., 78, 109 (1991)
Kotter M, Lintz HG, Turek T, Trimin DL, Appl. Catal. A: Gen., 52, 225 (1989)
Li Y, Paula J, Battavio J, Armor JN, J. Catal., 142, 561 (1993)
Il’chenko NI, Golodets GS, J. Catal., 39, 57 (1975)
Il’chenko NI, Golodets GS, J. Catal., 39, 73 (1975)
Jeong SK, Dissertation D, Korea Univ., Seoul. Korea (2000)
Kijlstra WS, Daamen JC, Vandegraaf JM, Vanderlinden B, Poels EK, Bliek A, Appl. Catal. B: Environ., 7(3-4), 337 (1996)
Lim HK, M. S. Thesis, Korea Univ., Seoul. Korea (2001)
Kapteijn F, Vanlangeveld AD, Moulijn JA, Andreini A, Vuurman MA, Turek AM, Jehng JM, Wachs IE, J. Catal., 150(1), 94 (1994)
Inomata M, Miyamoto A, Murakami Y, Chem. Lett., 799 (1978)
Kaptein F, Singoredjo L, Dekker NJJ, Mouljin JA, Ind. Eng. Chem. Res., 32, 445 (1993)

[Related Articles]

[1] Heck RM, Catal. Today, 53(4), 519 (1999)

[2] Singoredjo L, Kover R, Kapteijn F, Moulijn J, Appl. Catal. B: Environ., 1, 297 (1992)

[3] Jehng JM, Deo G, Weckhuysen BM, Wachs IE, J. Mol. Catal. A-Chem., 110, 41 (1996)

[4] Turco M, Lisi L, Pirone R, Ciambelli P, Appl. Catal. B: Environ., 3(2-3), 133 (1994)

[5] Duffy BL, Curryhyde HE, Cant NW, Nelson PF, J. Phys. Chem., 98(29), 7153 (1994)

[6] Duffy BL, Curryhyde HE, Cant NW, Nelson PF, Appl. Catal. B: Environ., 5(1-2), 133 (1994)

[7] Odenbrand CUI, Gabrielsson LT, Brandin JGM, Appl. Catal., 78, 109 (1991)

[8] Kotter M, Lintz HG, Turek T, Trimin DL, Appl. Catal. A: Gen., 52, 225 (1989)

[9] Li Y, Paula J, Battavio J, Armor JN, J. Catal., 142, 561 (1993)

[10] Il’chenko NI, Golodets GS, J. Catal., 39, 57 (1975)

[11] Il’chenko NI, Golodets GS, J. Catal., 39, 73 (1975)

[12] Jeong SK, Dissertation D, Korea Univ., Seoul. Korea (2000)

[13] Kijlstra WS, Daamen JC, Vandegraaf JM, Vanderlinden B, Poels EK, Bliek A, Appl. Catal. B: Environ., 7(3-4), 337 (1996)

[14] Lim HK, M. S. Thesis, Korea Univ., Seoul. Korea (2001)

[15] Kapteijn F, Vanlangeveld AD, Moulijn JA, Andreini A, Vuurman MA, Turek AM, Jehng JM, Wachs IE, J. Catal., 150(1), 94 (1994)

[16] Inomata M, Miyamoto A, Murakami Y, Chem. Lett., 799 (1978)

[17] Kaptein F, Singoredjo L, Dekker NJJ, Mouljin JA, Ind. Eng. Chem. Res., 32, 445 (1993)