V2O5/TiO2 촉매의 Ball Milling에 따른 산소 거동 특성 연구

권동욱; 박광희; 이상문; 장두훈; 홍성창; Dong Wook Kwon; Kwang Hee Park; Sang Moon Lee; Du Hun Jang; Sung Chang Hong

Applied Chemistry for Engineering, Vol.22, No.6, 605-609, December, 2011

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V2O5/TiO2 촉매의 Ball Milling에 따른 산소 거동 특성 연구

A Study on the Oxygen Behavior Characterization of V2O5/TiO2 Catalysts by Ball Milling

권동욱, 박광희, 이상문, 장두훈, 홍성창 ^†

경기대학교 일반대학원 환경에너지시스템공학과

Dong Wook Kwon, Kwang Hee Park, Sang Moon Lee, Du Hun Jang, and Sung Chang Hong^†

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

E-mail:

초록

Ball milling을 이용하여 제조한 NH3-SCR용 V2O5/TiO2 촉매의 산소 거동 특성을 연구하였다. Ball milling으로 인한 촉매 TiO2의 결정구조, 비표면적 변화는 없지만 H2-TPR분석에서는 최대 환원온도가 저온으로 이동한다. 산소농도를 달리한 반응성 실험에서 모든 촉매는 산소가 없을 때 매우 낮은 NOx 전환율을 보이고, 산소 농도에 따라 BMC (Ball Milling Catalyst)의 활성이 더 우수한 경향을 나타낸다. 이는 격자산소와 기상산소의 반응참여 정도가 NMC (No Milling Catalyst) 보다 더 크기 때문이다.

We study on the oxygen behavior of V2O5/TiO2 catalysts in the NH3-selective catalytic reduction (SCR) prepared by the ball milling processing. There are not any changes in crystal structure and surface area of the TiO2 catalyst by ball milling, but the maximal reduction temperature decreased in H2-temperature programmed reduction (TPR) analysis. Experimental observations with various concentrations of oxygen indicate that all catalysts showed a very low NOx conversion rate in the absence of oxygen and the reactivity of ball milled catalyst higher depending on the oxygen. It is occurred because the degree of participation of atmospheric oxygen and lattice oxygen is great than that of the not-milled catalyst.

Keywords:selective catalytic reduction;catalyst;ball milling;NOx removal

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[Related Articles]

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

[2] Seo PW, Lee JY, Shim KS, Hong SH, Hong SC, Hong SI, J. Hazard. Mater., 165(1-3), 39 (2009)

[3] Begin-Colin S, Wolf F, Le Caer G, J. Phys. III France., 7, 473 (1997)

[4] On DT, Kapoor MP, Thibault E, Gallot JE, Lemay G, Kaliaguine S, Microporous Mesoporous Mater., 20, 107 (1998)

[5] Oelerich W, Klassen T, Bormann R, J. Alloys Compd., 322, L5 (2001)

[6] Hu J, Qin H, Sui Z, Lu H, Mater. Lett., 53, 421 (2002)

[7] Coste S, Bertrand G, Coddet C, Gaffet E, Hahn H, Sieger H, J. Alloys Compd., 434, 489 (2007)

[8] Zazhigalov VA, Haber J, Stoch J, Kharlamov AI, Bogutskaya LV, Bacherikova IV, Kowal A, Solid State Ionics., 101, 1257 (1997)

[9] Miyamoto A, Kobayashi K, Inomata M, Murakami Y, J.Phys. Chem., 86, 2945 (1982)

[10] Haber J, Witko M, J. Catal., 216(1-2), 416 (2003)

[11] Koebel M, Madia G, Raimondi F, Wokaun A, J. Catal., 209(1), 159 (2002)

[12] Qi GS, Yang RT, J. Catal., 217(2), 434 (2003)

[13] Wong GS, Kragten DD, Vohs JM, Surf. Sci., 452, L293 (2000)

[14] Wong WC, Ph. D Dissertation, University of California (1982)

[15] Sorrentino A, Rega S, Sannino D, Magliano A, Ciambelli P, Santacesaria E, Appl. Catal. A: Gen., 209(1-2), 45 (2001)