Abstract
The mass transfer characteristics of monolith reactors in gas–liquid–solid applications have been investigated. A model is proposed which gives correlations based on different mass transfer steps for Taylor flow in capillaries. The fast hydrogenation of α-methylstyrene over Pd monolith catalysts of different cell densities ( 200–600 cpsi ) was used as a test reaction in a pilot reactor. The reaction could be carried out in the internal and external mass transfer limited regime, as has been verified by a change in activation energy plots. Depending on the operating conditions, the overall mass transfer group k ov a ranged from 0.5 to 1.5 s −1 , which shows that excellent mass transfer can be achieved for gas–liquid–solid reactions in monolith reactors.
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