Pt/TiO2 촉매의 H2 SCR 반응 특성에 관한 연구

김성수; 최현진; 홍성창; Sung Su Kim; Hyun Jin Choi; Sung Chang Hong

Applied Chemistry for Engineering, Vol.21, No.1, 18-23, February, 2010

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Pt/TiO2 촉매의 H2 SCR 반응 특성에 관한 연구

A Study on Reaction Characteristics of H2 SCR using Pt/TiO2 Catalyst

김성수 , 최현진, 홍성창 ^{1, †}

경기대학교 대학원 환경에너지시스템공학과
¹경기대학교 환경에너지시스템공학과

Sung Su Kim , Hyun Jin Choi, and Sung Chang Hong^{1, †}

Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University, Gyeonggi-do 442-760, Korea
¹Department of Environmental Energy Systems Engineering, Kyonggi University, Gyeonggi-do 442-760, Korea

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초록

TiO2를 담체로 한 Pt계 촉매를 이용하여 저온(80∼150 ℃) 영역에서 적용될 수 있는 H2 SCR의 촉매 반응 특성을 조사하였다. 실험은 반응가스 중 수분, 산소, 촉매의 소성온도, H2/NOx 몰비, 공간속도에 대하여 수행하였다. Pt/TiO2를 이용한 H2 SCR 반응에서 수분은 inhibition으로 작용하였으며, 배가스 중 산소 농도가 희박할수록 반응활성이 증가하는 경향을 나타내었다. 하지만 산소가 존재하지 않을 때에는 NOx와 H2가 반응하여 NH3 slip이 발생하였다. 또한 촉매의 상전이 문제에 의하여 600 ℃ 이하에서 소성하는 것이 가장 유리하였으며, H2/NOx 몰비가 증가할수록 반응 활성이 증가하였다. 하지만 H2 slip은 몰비가 증가하여도 H2가 H2O로 산화되어 나타나지 않았다.

This work investigated the catalytic reaction characteristics of H2 SCR applied at low temperature (80∼150 ℃) using Pt catalyst supported on TiO2. The experiments were performed in terms of H2O, O2 in reaction gas, calcination temperature of the Pt catalyst, H2/NOx mole ratio, space velocity. H2O was an inhibitor of reaction on H2 SCR using Pt catalyst, catalytic performance increased as O2 concentration decreased. Nevertheless, NH3 slip generated by the reaction between NOx and H2 in the absence of O2. While it was effective to calcine less than 600 ℃ by phase transition and the catalytic performance increased as H2/NOx mole ratio increased. However, H2 slip was not observed at that increase mole ratio by H2 oxidation to H2O.

Keywords:Pt;H2;SCR;NOx

[References]

Lee IY, Kim DW, Lee JB, Yoo KO, J. KSEE, 21, 1339 (1999)
Iwamoto M, Hamada H, Catal. Today, 10, 57 (1991)
Burch R, Ottery D, Appl. Catal. B: Environ., 13(2), 105 (1997)
Obuchi A, Ohi A, Nakamura M, Ogata A, Mizuno K, Ohuchi H, Appl. Catal., 2, 71 (1993)
Burch R, Millington PJ, Catal. Today, 26(2), 185 (1995)
Misno M, Kondo K, Chem. Lett., 1001 (1991)
Li Y, Armor JN, Appl. Catal., B, 2, L31 (1992)
Kokes RJ, J. Phys. Chem., 70, 296 (1966)
Kobylinski TP, Taylor BW, J. Catal., 31, 450 (1973)
Kobylinski TP, Taylor BW, J. Catal., 33, 376 (1973)
Fritz A, Pitchon V, Appl. Catal. B: Environ., 13(1), 1 (1997)
Burch R, Ramli A, Appl. Catal. B: Environ., 15(1-2), 49 (1998)
Cant NW, Angove DE, Chambers DC, Appl. Catal. B: Environ., 17(1-2), 63 (1998)
Gervasini A, Carniti P, Ragaini V, Appl. Catal. B: Environ., 22(3), 201 (1999)
Mannstadt W, Freeman AJ, Phys. Rev. B, 55, 13298 (1997)
Kobylinski TP, Taylor BW, J. Catal., 33, 376 (1974)
Wang XQ, Sigmon SA, Spivey JJ, Lamb HH, Catal. Today, 96(1-2), 11 (2004)
Mazzocchia C, Kaddouri A, J. Mol. Catal. A: Chem., 204 (2003)
Kim SC, J. Hazard. Mater., 91(1-3), 285 (2002)
Sekine Y, Atmos. Environ., 36, 5543 (2002)
Hoang DL, Farrage SAF, Radnik J, Pohl MM, Schneider M, Lieske H, Martin A, Appl. Catal. A: Gen., 333(1), 67 (2007)
Burch R, Millington PJ, Catal. Today, 26(2), 185 (1995)
Li Y, Paula J, Battavio J, Armor JN, J. Catal., 142, 561 (1993)

[Referenced By]

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[1] Lee IY, Kim DW, Lee JB, Yoo KO, J. KSEE, 21, 1339 (1999)

[2] Iwamoto M, Hamada H, Catal. Today, 10, 57 (1991)

[3] Burch R, Ottery D, Appl. Catal. B: Environ., 13(2), 105 (1997)

[4] Obuchi A, Ohi A, Nakamura M, Ogata A, Mizuno K, Ohuchi H, Appl. Catal., 2, 71 (1993)

[5] Burch R, Millington PJ, Catal. Today, 26(2), 185 (1995)

[6] Misno M, Kondo K, Chem. Lett., 1001 (1991)

[7] Li Y, Armor JN, Appl. Catal., B, 2, L31 (1992)

[8] Kokes RJ, J. Phys. Chem., 70, 296 (1966)

[9] Kobylinski TP, Taylor BW, J. Catal., 31, 450 (1973)

[10] Kobylinski TP, Taylor BW, J. Catal., 33, 376 (1973)

[11] Fritz A, Pitchon V, Appl. Catal. B: Environ., 13(1), 1 (1997)

[12] Burch R, Ramli A, Appl. Catal. B: Environ., 15(1-2), 49 (1998)

[13] Cant NW, Angove DE, Chambers DC, Appl. Catal. B: Environ., 17(1-2), 63 (1998)

[14] Gervasini A, Carniti P, Ragaini V, Appl. Catal. B: Environ., 22(3), 201 (1999)

[15] Mannstadt W, Freeman AJ, Phys. Rev. B, 55, 13298 (1997)

[16] Kobylinski TP, Taylor BW, J. Catal., 33, 376 (1974)

[17] Wang XQ, Sigmon SA, Spivey JJ, Lamb HH, Catal. Today, 96(1-2), 11 (2004)

[18] Mazzocchia C, Kaddouri A, J. Mol. Catal. A: Chem., 204 (2003)

[19] Kim SC, J. Hazard. Mater., 91(1-3), 285 (2002)

[20] Sekine Y, Atmos. Environ., 36, 5543 (2002)

[21] Hoang DL, Farrage SAF, Radnik J, Pohl MM, Schneider M, Lieske H, Martin A, Appl. Catal. A: Gen., 333(1), 67 (2007)

[22] Burch R, Millington PJ, Catal. Today, 26(2), 185 (1995)

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