Sample of catalyst, pellets of high temperature shift converter, ICI 15-4, stored in glass flask (displayed inverted) for animated process flow display, part of of 'Ammonia Four', an ammonia synthesis plant at ICI Agricultural Division, Billingham works, by Cleveland Process Designs and ICI Ltd, Stockton on Tees, England, 1976. Sample of catalyst, pellets of high temperature shift converter, ICI 15-4, for ICI Billingham 'Ammonia Four' model 1976