2024-03-29T13:40:02Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1825112019-05-28T00:58:49Zcom_10261_101com_10261_5col_10261_354
2019-05-27T12:56:11Z
urn:hdl:10261/182511
TiO2/Cu(II) photocatalytic production of benzaldehyde from benzyl alcohol in solar pilot plant reactor
Spasiano, Danilo
Prieto Rodríguez, Lucía del Pilar
Carbajo Olleros, Jaime
Malato, Sixto
Marotta, Raffaele
Andreozzi, Roberto
Figure-of-merit
Solar photocatalytic plant
TiO2 photocatalysis
Benzaldehyde production
Benzyl alcohol
Selective oxidation
The technical feasibility of selective photocatalytic oxidation of benzyl alcohol to benzaldehyde, in aqueous solutions, in presence of cupric ions has been investigated in a solar pilot plant with Compound Parabolic Collectors. Aldrich (pure anatase) and P25 Degussa TiO2 have been used as photocatalysts. The influences of cupric species concentrations, solar irradiance and temperature are discussed too. The oxidation rates were strongly influenced by the initial cupric ions concentration, incident solar irradiance and temperatures. The best results found, in terms of yields and selectivities to benzaldehyde under acidic conditions were higher than 50% and 60%, respectively, under acidic conditions. Under deaerated conditions, the presence of reduced copper species was proved by XPS analysis. The results indicated that, at the end of the process, cupric species can be easily regenerated and reused, through a re-oxidation of reduced copper, produced during the photolytic run, with air or oxygen in dark conditions. A figure-of-merit (ACM), proposed by the International Union of Pure and Applied Chemistry (IUPAC) and based on the collector area, has been estimated, under the proposed conditions, with the aim to provide a direct link to the solar-energy efficiency independently of the nature of the system. Generally speaking, it can be considered that the lower ACM values the higher the system efficiency.
2019-05-27T12:56:11Z
2019-05-27T12:56:11Z
2013-06-05
2019-05-27T12:56:12Z
artículo
Applied Catalysis B: Environmental 136-137: 56-63 (2013)
0926-3373
http://hdl.handle.net/10261/182511
10.1016/J.APCATB.2013.01.055
eng
https://doi.org/10.1016/j.apcatb.2013.01.055
closedAccess
Elsevier