Apparatus for investigating the performance of a catalyst used in a catalytic cracking process includes a single fluidized bed reactor charged with the catalyst to be investigated and a digital computer which controls the supply of hydrocarbon feed stock and regenerating air in successive and repeated...http://www.google.com.au/patents/US4419328?utm_source=gb-gplus-sharePatent US4419328 - Controlled fluidized bed reactor for testing catalysts
