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Received December 21, 2004
Accepted March 30, 2005
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Raney Ni Catalysts Derived from Different Alloy Precursors (I) Morphology and Characterization
Division of Chemical Engineering, Pukyong National University, Busan 608-739, Korea
gdlee@pknu.ac.kr
Korean Journal of Chemical Engineering, May 2005, 22(3), 375-381(7), 10.1007/BF02719414
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Abstract
Ni-Al alloys containing 41.3, 49.2 and 59.9 wt% Ni were leached by reaction with 20 wt% aqueous NaOH solution under different temperature and time. The reactivities of alloys and morphologies of resultant catalysts were investigated. A large difference in reactivities of alloys toward alkali solution was revealed according to the composition of the alloy. As Al content in precursor alloy increased, the reactivity of alloy toward alkali solution increased. It was shown that, during leaching, reaction in Ni 41.3 wt% alloy is restricted to reaction interface, whereas that in Ni 49.9 wt% alloy occurs throughout the product layer. Surface area and pore size distribution were seen to be strongly dependent upon leaching conditions and relatively independent of the composition of precursor alloy.
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Hoffer BW, Crezee E, Devred F, Mooijman PRM, Sloof WG, Kooyman P, van Langeveld AD, Kapteijn F, Moulijn JA, Appl. Catal. A: Gen., 253(2), 437 (2003)
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Kuhn U, Warlimont H, Mattern N, Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process., 226, 900 (1997)
Lei H, Song Z, Tan DL, Bao XH, Mu XH, Zong BN, Min EZ, Appl. Catal. A: Gen., 214(1), 69 (2001)
Liu ZW, Jun KW, Roh HS, Park SE, Oh YS, Korean J. Chem. Eng., 19(5), 735 (2002)
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Sane S, Bonnier JM, Damon JP, Masson J, Appl. Catal., 9, 69 (1984)
Zhu P, Li JCM, Liu CT, Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process., 329, 57 (2002)
