Reduction of Nitric Oxide with Ammonia over HZSM-5 Zeolite and Its Cu2+-Exchanged Zeolite

Il Shik Moon; Tatsuaki Yashima

Journal of Industrial and Engineering Chemistry, Vol.2, No.2, 157-163, November, 1996

Dept. of Chem. Eng., College of Engineering, Suncheon National University, Suncheon, Chonnam 540-742, Korea
¹Dept. of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152, Japan

The catalytic reduction of NO with NH₃ was studied over HZSM-5 zeolite. For this catalytic reduction, oxygen was found to be essential. As the concentration of oxygen increased, the conversion of NO increased as well. The kinetics of the NO-NH₃-O₂ reaction were also investigated. The kinetic data were expressed by the experimental rate equation. Furthermore, from the experimental results, including the effect of temperature on the NO reaction, the reduction mechanism was proposed to be the decomposition of the ammonium nitrite formed by the reaction of NO₂ with ammonium ions. The catalytic reduction of NO with NH₃ was also investigated over Cu²⁺-exchanged ZSM-5 zeolite. Oxygen was not essential for this reduction. However, as the concentration of O₂ was increased from 0 to 0.5%, the conversion of NO increased rapidly and leveled off. The kinetics of the NO-NH₃ reaction were investigated and expressed by the experimental rate equation.

[References]

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[Referenced By]

[Related Articles]

[1] Hans B, Janssen F, Catal. Today, 2, 369 (1988)

[2] Bauerle GL, Wu SC, Nobe K, Ind. Eng. Chem. Prod. Res. Dev., 17, 123 (1978)

[3] Niiyama H, Murata K, Echigoya E, J. Catal., 48, 201 (1977)

[4] Kasaoka S, Sasaoka E, Yamanaka T, Ono E, Nippon Kagaku Kaishi, 6, 874 (1978)

[5] Bauerle GL, Wu SC, Nobe K, Ind. Eng. Chem. Prod. Res. Dev., 14, 123 (1975)

[6] Bauerle GL, Wu SC, Nobe K, Ind. Eng. Chem. Prod. Res. Dev., 17, 117 (1978)

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

[8] Takagi M, Kawai T, Soma M, Onishi T, Tamaru K, J. Catal., 50, 441 (1977)

[9] Inomata M, Miyamoto A, Murakami Y, J. Catal., 62, 140 (1980)

[10] Nam IS, Eldrige JW, Kittrell JR, Ind. Eng. Chem. Prod. Res. Dev., 25, 192 (1986)

[11] Brandin JGM, Anderssen LAH, Odenbrand ICU, Catal. Today, 4, 187 (1989)

[12] Anderssen LAH, Brandin JGM, Odenbrand ICU, Catal. Today, 4, 173 (1989)

[13] Kiovsky JR, Koradia PB, Lim CT, Ind. Eng. Chem. Prod. Res. Dev., 19, 218 (1980)

[14] Seiyama T, Arakawa T, Matsuda T, Takita Y, Yamazoe N, J. Catal., 48, 1 (1977)

[15] Mizumoto M, Yamazoe N, Seiyama T, J. Catal., 59, 319 (1979)

[16] Seiyama T, Mizumoto M, Shihara T, Yamazoe N, Ind. Eng. Chem. Prod. Res. Dev., 18, 279 (1979)

[17] Mizumoto M, Yamazoe N, Seiyama T, J. Catal., 59, 319 (1979)

[18] Yashima T, Sakaguchi Y, Namba S, Stud. Surf. Sci. Catal., 7, 793 (1987)

[19] Lee G, RayC, Siemers R, Moore R, American Laboratory, Feb. (1989)

[20] Marvart M, Pour VL, J. Catal., 7, 279 (1967)

[21] Naruse Y, Ogasawara T, Hata T, Kishitaka H, Ind. Eng. Chem. Prod. Res. Dev., 19, 57 (1980)

[22] Topsoe NY, Pedersen K, Derouane EG, J. Catal., 70, 41 (1981)

[23] Hidalgo CV, Itoh H, Hattori T, Niwa M, Murakami Y, J. Catal., 85, 362 (1984)

[24] Choung SJ, Butt JB, Appl. Catal., 64, 173 (1990)

[25] Inomata M, Miyamoto A, Murakami Y, J. Catal., 62, 140 (1980)

[26] Iwamoto M, Yahiro H, Mine Y, Kagawa S, Chem. Lett., 213 (1989)

[27] Odenbrand ICU, Lundin ST, Andersson LAH, Appl. Catal., 18, 335 (1985)