Preshaped carrier bodies

Deposition-precipitation onto preshaped carrier bodies... 

L.M. Knijff, P.H. Bolt, R. van Yperen, A.J. van Dillen, J.W. Geus, Production of nickel-on-alumina catalysts from preshaped bodies K.P. de Jong, Deposition-precipitation onto preshaped carrier bodies — possibilities and limitations P.J. van den Brink, A. Scholten, A. van Wageningen, M.D.A. Lamers, A.J. van Dillen, J.W. Geus, The use of chelating agents for the preparation of iron oxide catalysts for the selective oxidation of hydrogen sulfide, all in Preparation of Catalysts V, Elsevier, Amsterdam, 1991. 

As remarked above, it is often desirable to apply a catalyst precursor directly onto a preshaped support. An obvious way to proceed would be to pore-volume impregnate the carrier bodies with the required amounts of metal salt and urea (or, alternatively, nitrite) in an aqueous solution and heat the impregnated particles to 70-90°C. This can actually be made to work, as has been shown recently in the case of Ni/y-A Oa, but the preparation of highly loaded catalysts would appear to be problematic with this route. 

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