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Novel synthesis route for egg-shell, egg-white and egg-yolk type of cobalt on silica catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
43963 45997 2006 5 PDF Available
Title
Novel synthesis route for egg-shell, egg-white and egg-yolk type of cobalt on silica catalysts
Abstract

A novel method for the preparation of egg-shell, egg-white and egg-yolk type of catalysts was developed. The synthesis procedure utilizes the hydrophobic nature of silica. Egg-shell catalysts with a sharp boundary can be prepared by covering the inside of the pellet with a defined amount of n-undecane prior to the impregnation procedure. A partial coverage of silica pellets with a hydrocarbon, n-undecane, protects that part of the pellet yielding an egg-shell type of catalyst. Egg-yolk type of catalysts can be prepared by leaching the shell of a homogeneously impregnated, reduced catalyst with nitric acid followed by neutralisation. Egg-white type of catalysts can be prepared by selective leaching of a reduced, egg-shell catalyst.

Keywords
Cobalt; Silica; Structured catalysts; Egg-shell catalyst; Egg-white catalyst; Egg-yolk catalyst
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Novel synthesis route for egg-shell, egg-white and egg-yolk type of cobalt on silica catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 301, Issue 1, 10 February 2006, Pages 138–142
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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