INVESTIGADORES
ALFANO Orlando Mario
artículos
Título:
Photocatalytic Reactors. Reaction Kinetics in a Flat Plate Solar Simulator
Autor/es:
BRANDI, R.J.; RINTOUL, G.; ALFANO, O.M.; CASSANO, A.E.
Revista:
CATALYSIS TODAY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2002 vol. 76 p. 161 - 175
ISSN:
0920-5861
Resumen:
The kinetics of the
photocatalytic decomposition of lowconcentrations of trichloroethylene (TCE)
inwaterwasmodeled and the reaction parameters have been evaluated for different
catalyst loadings. The employed reactor is a flat plate configuration irradiated
by tubular lamps that have emission in the 300?400 nm wavelength range. The
mass conservation model is two-dimensional while the developed radiation model
is two-dimensional in space and two directional in radiation propagation. The
performance of the photoreactor with this reaction can be properly represented employing
only two lumped kinetic constants that can be derived from a 12 steps, complete
reaction sequence. The deduced kinetic model has explicit functional
dependencies for the local volumetric rate of photon absorption (LVRPA) and the
effect of the catalyst concentration. Values of the kinetic constants are: α = 1.94×10−9 mol g1/2 cm−2 s−1/2 einstein−1/2 and α3 = 5.52×106 cm3 mol−1. As derived from the reaction sequence and validated
with experiments, it was observed that the reaction rate is proportional to the
square root of the LVRPA. The dependence on the catalyst loading, well
described by the model, is more complex due to its characteristic effect on the
light distribution inside the reaction space.