An adsorption process of water pollutants on a bed of activated carbon (AC) modified with metal oxide catalysts, was integrated in a single unit with periodic catalytic gas-phase regeneration at 240-290 °C. In the present contribution we report on the kinetics of the regeneration process: it exhibit an induction period and the rate passes through a maximum. Replotting the data scaled with respect to the maximal rate and the corresponding time shows that the curves overlap. In the process of regeneration the adsorbate moves from the carbon to the metal catalyst crystallites probably by surface diffusion. This process is modeled and compared with experimental observations. Solutions of suggested models with various kinetics are compared with experimental observation enabling to extract parameters like activation energies and rate constants.
|Number of pages||13|
|Journal||Chemical Engineering Science|
|State||Published - May 1999|
|Event||Proceedings of the 1999 1st International Symposium on Multifunctional Reactors - Amsterdam, NLD|
Duration: 25 Apr 1999 → 28 Apr 1999
- Granular materials
- Reaction engineering