The description relates to a particularly abrasion-resistant catalyst carrier of special activated aluminium oxide. The aluminium oxide consists of either the ''gamma'' or the ''kappa'' modification and has no delta modification, or it consists of the ''kappa'' and ''theta'' modification and has no alpha modification. Carrier catalysts which contain catalytically active metals and/or metal compounds on the abrasion-resistant carrier are especially suitable for use in fluidised bed processes.
