Abstract
Solid-state reaction between compositions and sintering behavior of powders at 600–1100°C were examined by x-ray diffraction, electron spin resonance and surface area measurement. Manganese-alumina catalyst, which was even subjected to heat treatment at 1000°C in air, had the NO removal conversion efficiency of 22% at 350–400°C Structural change and chemical state of alumina-supported manganese catalytic powders were studied for the purpose of the improvement of performance in automotive lean-burn NOx removal treatment for a model lean exhaust with high space velocity of 100,000 h−1. La-modification of support was effective to maintain high surface area of powder, however it did not lead to the improvement of NO removal activity for manganese-based catalyst.
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W. Held, A. Konig, T. Richter and L. Puppe, SAE paper No.900496 (Soc.Automotive Engn., 1990) p1.
M. Iwamoto and H. Hamada, Catal. Today 10 (1991) 57.
H. Hamada, Y. Kintaichi, M. Sasaki and T. Ito, Appl. Catal. 70 (1991) L15.
Idem., ibid. 75 (1991) L1.
Y. Kintaichi, H. Hamada, M. Tabata, M. Sasaki and T. Ito, Catal. Lett. 6 (1991) 239.
M. Iwamoto, N. Mizuno and H. Yahiro, Sekiyu Gakkaishi 34 (1991) 375
C. N. Montreil and M. Shelef, Appl. Catal. B 1 (1992) L1-L8.
S. Subramanian, R. J. Kudla, W. Chun and M. Chattha, Ind. Eng. Chem. Res. 32 (1993) 1805.
A. Obuchi, A. Ohi, M. Nakamura, O. Ogata, K. Mizuno and H. Obuchi, Appl. Catal. B 2 (1993) 71.
K. C. C. Kharas, ibid. 2 (1993) 207.
S. Matsumoto, K. Yokota, H. Doi, M. Kimura, M. Sekikawa and H. Kasahara, Catal. Today 22 (1994) 127.
B. Dziewiecka and Z. Dziewiecki, ibid. 17 (1993) 121.
X. Zhang, A. B. Walters and M. A. Vannice, Appl. Catal. B 4 (1994) 237.
M. Ozawa, H. Toda, O. Kato and S. Suzuki, Applied Catalysis B 8 (1996) 122.
M. Ozawa, S. Suzuki and H. Toda, J. Am. Ceram. Soc. 80 (1997) 195.
H. Schaper, E. B. M. Doesburg and L. L. Van Reijin, Appl. Catal. 7 (1983) 211.
F. O. Oudet, P. Courtine and A. Vejux, J. Catal. 114 (1988) 112.
N. MIYOSHI, S. Matsumoto, M. Ozawa and M. Kimura, SAE Technical paper No. 891970 (Soc. Automotive Engn., 1989) p. 1.
M. Ozawa, M. Kimura and A. Isogai, J. Less-common Met. 162 (1990) 297.
C. Yokoyama and M. Misono, Catal. Lett. 29 (1994)1.
A Vannice and T. Yamashita, Appl. Catal. B 14 (1997) 141.
X. Zhang, A. B. Walters and M. A. Vannice, Catal. Today 27 (1996) 41.
C. Shui, A. B. Walters and M. A. Vannice, Appl. Catal. B 14 (1997) 175.
B. Klingenberg and M. A. Vannice, ibid. 21 (1997) 19.
S.-J. Huang, A. B. Walters and M. A. Vannice, ibid. 26 (2000) 101.
M. Ozawa and S. Suzuki, J. Mater. Sci. Lett. 13 (1994) 435.
M. Ozawa, K. Hashimoto and S. Suzuki, Appl. Surf. Sci. 121/122 (1997) 437.
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Ozawa, M., Hashimoto, K. & Suzuki, S. High-temperature structural change of catalytic MnOx-LaOx-Al2O3 powder for lean-exhaust NOx removal treatment. Journal of Materials Science 36, 1401–1405 (2001). https://doi.org/10.1023/A:1017524108254
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DOI: https://doi.org/10.1023/A:1017524108254