INTEC   05402
INSTITUTO DE DESARROLLO TECNOLOGICO PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
artículos
Título:
Photocatalytic Degradation of Formaldehyde in Gas Phase on TiO2 Films: A Kinetic Study
Autor/es:
PASSALIA, C.; MARTINEZ RETAMAR, M.E.; ALFANO, O.M.; BRANDI, R.J.
Revista:
INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING
Editorial:
BERKELEY ELECTRONIC PRESS
Referencias:
Año: 2010 vol. 8 p. 1 - 30
ISSN:
1542-6580
Resumen:
The kinetic
modeling of the photocatalytic degradation of formaldehyde a major indoor
pollutant in air using an experimental catalytic wall continuous reactor is
addressed. A stainless steel flat plate coated with titanium dioxide was placed
within the reactor, over which flows an air stream with a known concentration of
formaldehyde. The energy source for the ultraviolet radiation that initiates
the degradation reactions is provided by a group of five black light lamps next
to the reactor window. An analytical expression for the photocatalytic
degradation of formaldehyde in air is proposed, based on published literature
on accepted reaction mechanisms. Once the kinetic control regime for the
reactor was determined, experiments were conducted by the variation of the
three operating variables that influence the reaction rate: the inlet
formaldehyde concentration, the relative humidity and the level of radiation. A
non-linear expression resulting from the combination of a mass balance for
formaldehyde and the rate expression were used to estimate the kinetic
parameters. The photocatalytic oxidation process for the removal of
formaldehyde in air proved to be feasible and efficient under the operating
conditions analyzed.