Heterogeneous catalysis, transient regime

Experiments and Processes in the Transient Regime for Heterogeneous Catalysis... 

Equation (2) (as an ordinary differential equation) and Eq. (3) apply now with Eq. (4). As already implied, a laboratory well-mixed reactor for heterogeneous catalysis is more difficult to realize than a PFR. Many versions have been used 12), and Froment and Bischoff 13) illustrate reactors with external recycle, with internal recycle 1,14), and with an internal spinning basket 15). When using these reactors for experiments in the transient regime, it is important to keep to a minimum the volume outside the bed of catalyst. Internal recycle reactors involve bearings exposed to hot reactive gases and require a magnetic drive system for leak-proof operation. Exter-... 

The main drawback of kinetic models, based only on steady-state data, is associated with the fact, that start-up and transient regimes cannot be reliably modeled. Kinetic models for nonstationary conditions should be applied also for the processes in fluidized beds, reactions in riser (reactor) - regenerator units with catalyst circulation, as well as for various environmental applications of heterogeneous catalysis, when the composition of the treated gas changes continuously. 

Carroll O. Bennett, Experiments and Processes in the Transient Regime for Heterogeneous Catalysis, Advances in Catalysis, vol. 44, Academic Press, New York, 2000. Pp. 329-416. 

Bennett, C.O., 1967. A dynamic method for the study of heterogeneous catalytic kinetics. AICHE J. 13, 890-895. Bennett, C.O., 1976. The transient method and elementary steps in heterogeneous catalysis. Catal. Rev. 13,121-148. Bennett, C.O., 2000. Experiments and processes in the transient regime for heterogeneous catalysis. In Haag, W.O., Gates, B., Knozinger, H. (Eds.), Advances in Catalysis. Elsevier Sciences, Dordrecht, pp. 329-416. 

Bennett, C.O. (1999) Experiments and processes in the transient regime for heterogeneous catalysis. Adv. Catal,... 

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