저온영역에서 메탈폼에 코팅된 V2O5-Sb2O3/TiO2 SCR 촉매의 NOx 저감성능에 미치는 SO2 영향에 관한 연구

나우진; 박영진; 방현석; 방종성; 박해경; Woo-Jin Na; Young-Jin Park; Hyun-Seok Bang; Jong-Seong Bang; Hea-Kyung Park

Clean Technology, Vol.22, No.2, 132-138, June, 2016

DOI10.7464/ksct.2016.22.2.132 Export Citation

저온영역에서 메탈폼에 코팅된 V2O5-Sb2O3/TiO2 SCR 촉매의 NOx 저감성능에 미치는 SO2 영향에 관한 연구

Effect of SO2 on NOx Removal Performance in Low Temperature Region over V2O5-Sb2O3/TiO2 SCR Catalyst Washcoated on the Metal Foam

나우진, 박영진, 방현석, 방종성, 박해경^†

한서대학교 화학공학과, 31962 충남 서산시 해미면 한서1로 46

Woo-Jin Na, Young-Jin Park, Hyun-Seok Bang, Jong-Seong Bang, and Hea-Kyung Park^†

Department of Chemical Engineering, Hanseo University, 46 Hanseo 1-ro, Heami-myun, Seosan-si, Chungnam 31962, Korea

E-mail:

초록

상용 발전소에서 LNG를 제외한 대부분의 연료 연소시 SO2의 배출은 필연적이며, 이는 NOx 저감용 SCR촉매의 내구성에 영향을 미치므로 저온영역에서 SO2에 대한 내구성과 NOx 저감 성능이 우수한 SCR촉매 개발을 목적으로 Sb2O3의 함침량을 달리하여 metal foam 지지체에 코팅하여 촉매를 제조하였다. 실험실 규모의 상압반응기를 이용하여 NOx 저감 성능 시험을 수행하였고, 제조된 촉매의 특성은 Porosimeter, BET, SEM (scanning electron microscope), EDX (energy dispersive X-ray spectrometer), XPS (X-ray photoelectron spectroscopy) 기기를 이용하여 분석하였다. 촉매의 특성분석결과 비표면적은 Sb2O3의 함침량에 따라 증가하였고, NOx 전환활성 효율은 Sb2O3를 2 wt% 함침한 촉매가 가장 우수한 것으로 측정되었다. 또한 Sb2O3를 첨가한 촉매는 SO2에 장시간 노출 시켰을 경우에도 NOx 전환활성 효율이 유지되는 것으로 나타났고, 활성온도영역과 SO2의 존재 유무에 따라 Sb2O3 함량을 조절함으로써 효율적인 촉매의 제조가 가능함을 확인할 수 있었다.

The emission of SO2 is inevitable in case of combustion of most fossil fuels except LNG in commercial power plant which has a bad effect on the durability of SCR catalyst. To develop a low temperature SCR catalyst which has a high NOx removal performance and excellent durability to SO2, V2O5/TiO2 catalysts were prepared by coating on the metal foam substrate with the impregnation amount of Sb2O3 as promotor. This study has evaluated the NOx removal performance and the durability to SO2 on a laboratory scale atmospheric reactor and analyzed the properties of the prepared catalysts by means of porosimeter, BET, SEM (scanning electron microscope), EDX (energy dispersive x-ray spectrometer), XPS (X-ray photoelectron spectroscopy). It was found that the surface area of catalyst increased with the impregnation amount of Sb2O3 and the NOx removal performance showed the highest value at the 2 wt% impregnation of Sb2O3. This results was considered to be due to the optimum active site on the catalyst surface. And also, Sb2O3 impregnated catalysts presented that NOx removal performance was maintained despite the exposure to SO2 for 5 hours. Therefore it was confirmed that metal foam SCR catalyst for low temperature could be manufactured with the optimum control of Sb2O3 impregnation according to the SO2 presence or not.

Keywords:SCR catalyst;NOx removal performance;Durability to SO2;Metal foam

[References]

Vargas MAL, Casanova M, Trovarelli A, Busca G, Appl. Catal. B: Environ., 75(3-4), 303 (2007)
Kobayashi M, Miyoshi K, Appl. Catal. B: Environ., 72(3-4), 253 (2007)
Bosch H, Janssen F, Catal. Today, 2, 369 (1988)
Choi SK, Choi SW, J. Envi. Sci. Intern., 15(4), 333 (2006)
Jang BJ, “The Research of Reaction Characteristic and the Improvement of Efficiency of TiO2 Catalyst for SCR in High Temperature,” M.S. Thesis, Kyonggi University, Suwon (2009).
Lee SM, “A Study on the Reaction Characteristics and Mechanism of the SCR over W/TiO2 Catalyst at High Temperature,” M.S. Thesis, Kyonggi University, Suwon (2010).
Kim SS, Hong S, J. Korean Ind. Eng. Chem., 18(3), 225 (2007)
Park KH, “A Study on the Correlation between Specific of V/TiO2 Catalyst for SCR and Durability of SO2,” M.S. Thesis, Kyonggi University, Suwon (2007).
Hong SC, J. Korean Ind. Eng. Chem., 17(5), 490 (2006)
Lietti L, Appl. Catal. B: Environ., 10(4), 281 (1996)
Burch R, Millington PJ, Catal. Today, 26(2), 185 (1995)
Inomata M, Mori K, Miyamoto A, Ui T, Murakami Y, J. Phys. Chem., 87(5), 754 (1983)
Teng H, Huang TS, Fuel, 75(2), 149 (1996)
Forzatti P, Lietti L, J. La Chim. Ind., 78(6), 685 (1996)
Khodayari R, Odenbrand CUI, Ind. Eng. Chem. Res., 37(4), 1196 (1998)
Ryi SK, Park JS, Choi SH, Cho SH, Kim SH, Chem. Eng. J., 113(1), 47 (2005)
Oh JK, Lee JM, Lee ES, Park MH, Oh KO, Lee BH, “A Study on Prediction of Pressure Drop of Metal Foam,” pp. 782-786, KSAE 2009 Annual Conference, Songdo, Incheon (Nov. 2009).
Silversmit G, Depla D, Poelman H, Marin GB, De Gryse, J. Electron Spectrosc. Relat. Phenom., 135, 167 (2004)

[Referenced By]

[1] Vargas MAL, Casanova M, Trovarelli A, Busca G, Appl. Catal. B: Environ., 75(3-4), 303 (2007)

[2] Kobayashi M, Miyoshi K, Appl. Catal. B: Environ., 72(3-4), 253 (2007)

[3] Bosch H, Janssen F, Catal. Today, 2, 369 (1988)

[4] Choi SK, Choi SW, J. Envi. Sci. Intern., 15(4), 333 (2006)

[5] Jang BJ, “The Research of Reaction Characteristic and the Improvement of Efficiency of TiO2 Catalyst for SCR in High Temperature,” M.S. Thesis, Kyonggi University, Suwon (2009).

[6] Lee SM, “A Study on the Reaction Characteristics and Mechanism of the SCR over W/TiO2 Catalyst at High Temperature,” M.S. Thesis, Kyonggi University, Suwon (2010).

[7] Kim SS, Hong S, J. Korean Ind. Eng. Chem., 18(3), 225 (2007)

[8] Park KH, “A Study on the Correlation between Specific of V/TiO2 Catalyst for SCR and Durability of SO2,” M.S. Thesis, Kyonggi University, Suwon (2007).

[9] Hong SC, J. Korean Ind. Eng. Chem., 17(5), 490 (2006)

[10] Lietti L, Appl. Catal. B: Environ., 10(4), 281 (1996)

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

[12] Inomata M, Mori K, Miyamoto A, Ui T, Murakami Y, J. Phys. Chem., 87(5), 754 (1983)

[13] Teng H, Huang TS, Fuel, 75(2), 149 (1996)

[14] Forzatti P, Lietti L, J. La Chim. Ind., 78(6), 685 (1996)

[15] Khodayari R, Odenbrand CUI, Ind. Eng. Chem. Res., 37(4), 1196 (1998)

[16] Ryi SK, Park JS, Choi SH, Cho SH, Kim SH, Chem. Eng. J., 113(1), 47 (2005)

[17] Oh JK, Lee JM, Lee ES, Park MH, Oh KO, Lee BH, “A Study on Prediction of Pressure Drop of Metal Foam,” pp. 782-786, KSAE 2009 Annual Conference, Songdo, Incheon (Nov. 2009).

[18] Silversmit G, Depla D, Poelman H, Marin GB, De Gryse, J. Electron Spectrosc. Relat. Phenom., 135, 167 (2004)