Raney Ni catalysts derived from different alloy precursors (I) morphology and characterization |
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Authors: | Gun Dae Lee Cha Soo Suh Jin Hwan Park Seong Soo Park Seong Soo Hong |
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Affiliation: | (1) Division of Chemical Engineering, Pukyong National University, 608-739 Busan, Korea |
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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.
This paper was prepared at the 2004 Korea/Japan/Taiwan Chemical Engineering Conference held at Busan, Korea between November
3 and 4, 2004. |
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Keywords: | Raney Ni Ni-Al Alloy Leaching Morphology Characterization |
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