Ammonia Synthesis Using Atomic Hydrogen Supplied From Silver-Palladium Alloy Membrane

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Ammonia formation activity was studied on the Ru/(MgO-CeO2) catalyst loaded on a Ag-Pd hydrogen permeable membrane. The ammonia formation rate for the membrane reactor was more increased than that based on the conventional flow-type one due to the high reactivity of atomic hydrogen supplied from the Ag-Pd membrane. In addition, other on-site hydrogen generation type membrane reactor was also constructed, where the Ag-Pd alloy membrane was not only atomic hydrogen supplier but also an electrode for water electrolysis. Ammonia was effectively formed even at 373 K on this membrane reactor with the electrodeposited Ru metal powder catalyst.

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Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

1597-1600

Citation:

M. Itoh et al., "Ammonia Synthesis Using Atomic Hydrogen Supplied From Silver-Palladium Alloy Membrane", Materials Science Forum, Vols. 561-565, pp. 1597-1600, 2007

Online since:

October 2007

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$38.00

[1] K. Aika, A. Ohya, A. Ozaki, Y. Inoue and I. Yasumori: J. Catal. Vol. 92 (1985), p.305.

[2] K. Aika, T. Takano and S. Murata: J. Catal. Vol. 136 (1992), p.126.

[3] S. R. Tennison, in: Catalytic Ammonia Synthesis, in 1st edn., ed. by J. R. Jennings Publications/Plenum, New York, (1991), p.303.

[4] F. Rosowski, A. Hornung, O. Hinrichsen, D. Herein and M. Muhler, and G. Ertl: Appl. Catal. A Vol. 151 (1997), p.443.

[5] M. Itoh, K. Machida and G. Adachi: Chem. Lett. Vol. 29 (2000), p.1162.

[6] K. Aika, M. Kumasaka, T. Oma, O. Kato, H. Matsuda, N. Watanabe, K. Yamazaki, A. Ozaki and T. Onishi: Appl. Catal. Vol. 28 (1986), p.57.

[7] M. Saito, M. Itoh, J. Iwamoto and K. Machida: Bull. Chem. Soc. Jpn. (2007), in press.

[8] Hydridocarbonyl anionic cluster initially forms by the nucleophilic attack of OH groups on support, then the oxidized Ru(II) carbonyl complexes are generated. The details are described in L. D'Ornelas, A. Theolier, A. Choplin and J. Basset: Inorg. Chem. Vol. 27 (1988).

[9] Y. Niwa and K. Aika: J. Catal. Vol. 162 (1996), p.138.

[10] C. Vayenas and S. Brosda: Solid State Ionics Vol. 154-155 (2002), p.243.