Abstract
Mesoporous gamma-alumina ( S BET = 149 m 2 g −1), prepared by thermal decomposition of hydrated aluminium sulphate, was heat-treated under various gas conditions in order to study the influence of the surrounding atmosphere on sintering rate. This was monitored by the reduction in specific surface area, Δ S/ S 0, as a function of calcination time, t. A kinetic equation of the type (Δ S/ S 0) γ = Kt was found to describe the experimental results adequately. Oxygen and water vapourwere both found to enhance sintering, when compared with the results obtained in an inert atmosphere.
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