INVESTIGADORES
CANDAL Roberto Jorge
artículos
Título:
TiO2 on magnesium silicate monolith: effects of different preparation techniques on the photocatalytic oxidation of chlorinated hydrocarbons
Autor/es:
ANA I. CARDONA; ROBERTO CANDAL; BENIGNO SANCHEZ; PEDRO AVILA; MOISES REBOLLAR
Revista:
ENERGY
Editorial:
Elsevier
Referencias:
Año: 2004 vol. 29 p. 845 - 852
ISSN:
0360-5442
Resumen:
In this article, the comparative results of the photocatalytic oxidation of trichloroethylene (TCE) alone
and a mixture of chlorinated hydrocarbons (trichloroethylene, perchloroethylene and chloroform) in gas
phase, obtained with three different monolithic catalysts in a flat reactor frontally illuminated with a
Xenon lamp are presented. The three catalysts incorporate titanium dioxide (TiO2) as active phase on a
magnesium silicate support, by means of different procedures:(i) incorporation of commercial TiO2 powder
into the silicate matrix (massic monolith); (ii) solgel coating of the silicate support; (iii) impregnation
with a commercial TiO2 aqueous suspension of the same silicate support. In the first case, the
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO2
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO2
into the silicate matrix (massic monolith); (ii) solgel coating of the silicate support; (iii) impregnation
with a commercial TiO2 aqueous suspension of the same silicate support. In the first case, the
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO2
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO2
magnesium silicate support, by means of different procedures:(i) incorporation of commercial TiO2 powder
into the silicate matrix (massic monolith); (ii) solgel coating of the silicate support; (iii) impregnation
with a commercial TiO2 aqueous suspension of the same silicate support. In the first case, the
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO2
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO2
into the silicate matrix (massic monolith); (ii) solgel coating of the silicate support; (iii) impregnation
with a commercial TiO2 aqueous suspension of the same silicate support. In the first case, the
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO2
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO2
2) as active phase on a
magnesium silicate support, by means of different procedures:(i) incorporation of commercial TiO2 powder
into the silicate matrix (massic monolith); (ii) solgel coating of the silicate support; (iii) impregnation
with a commercial TiO2 aqueous suspension of the same silicate support. In the first case, the
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO2
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO2
into the silicate matrix (massic monolith); (ii) solgel coating of the silicate support; (iii) impregnation
with a commercial TiO2 aqueous suspension of the same silicate support. In the first case, the
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO2
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO2
2 powder
into the silicate matrix (massic monolith); (ii) solgel coating of the silicate support; (iii) impregnation
with a commercial TiO2 aqueous suspension of the same silicate support. In the first case, the
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO2
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO2
2 aqueous suspension of the same silicate support. In the first case, the
massic monolith was made from a 50:50 w/w mixture of magnesium silicate and Titafrance G5 TiO22
powder. In the second case, a magnesium silicate monolith was coated with several layers of an aqueous
TiO2 sol prepared from hydrolysis and condensation of titanium tetra-isopropoxide (Ti(OC3H7)4) in
excess of acidified water (acid catalysis). The third catalyst was prepared by impregnating the same silicate
support with several layers of Titafrance G5 TiO2 powder water suspension. All the catalysts were
thermal treated under comparable conditions in order to fix the TiO2 active phase to the silicate support.
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified
thermal treated under comparable conditions in order to fix the TiO2 active phase to the silicate support.
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified
excess of acidified water (acid catalysis). The third catalyst was prepared by impregnating the same silicate
support with several layers of Titafrance G5 TiO2 powder water suspension. All the catalysts were
thermal treated under comparable conditions in order to fix the TiO2 active phase to the silicate support.
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified
thermal treated under comparable conditions in order to fix the TiO2 active phase to the silicate support.
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified
2 sol prepared from hydrolysis and condensation of titanium tetra-isopropoxide (Ti(OC3H7)4) in
excess of acidified water (acid catalysis). The third catalyst was prepared by impregnating the same silicate
support with several layers of Titafrance G5 TiO2 powder water suspension. All the catalysts were
thermal treated under comparable conditions in order to fix the TiO2 active phase to the silicate support.
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified
thermal treated under comparable conditions in order to fix the TiO2 active phase to the silicate support.
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified
2 powder water suspension. All the catalysts were
thermal treated under comparable conditions in order to fix the TiO2 active phase to the silicate support.
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified
2 active phase to the silicate support.
Although the performance of the massic monolith was better than the solgel monolith, the latter is of
great interest because this technique allows the chemical composition of the active films to be easily
modified