Solar photocatalytic reactors fixed

Different types of solar photocatalytic reactors have been developed over time. Two main distinctions have been made (i) concentrating versus nonconcentrating reactors and (ii) slurry versus fixed catalyst reactors. These two classifications are not mutually exclusive, and other categories may also be established, for instance, a very important is the one of tubular solar photoreactors. 

Solar photocatalytic reactors can be operated in either continuous single pass mode or discontinuous batch mode. In the continuous single pass mode, complete oxidation of the contaminant is achieved in a single pass with the water flow rate being adjusted for fixed solar flux densities. On the other hand, batch mode operation requires a set volume of water to be treated with varying solar flux densities (Alfano et al., 2000). Table 2.4 reports the main types of solar reactors reported in the technical literature. 

Zayani G, Boussehni L, Mhenni F, Ghrabi A (2009) Solar photocatalytic degradation of commercial textile azo dyes performance of pilot plant scale thin film fixed-bed reactor. Desalination 246 344—352... 

Bekbolet, M., Lidner, M., Weichgrebe, D., and Bahnemann, D., Photocatalytic detoxification with the thin-film fixed bed reactor clean up of highly polluted landfill effluents using a novel Ti02 photocatalyst, Solar Energy, 56(5), 455, 1996. 

Bockelmami, D., Goslich, R., Weichgreb, D.,aiid Bahiiemaiiii, D., 1993, Solar detoxification of polluted water Comparing the efficiencies of a parabolic reactor and a novel thin-film fixed-bed reactor, in Photocatalytic purification and treatment of water, Ollis, D., and Al-Ekabi, H., eds., Elsevier, New York, pp. 639-644. 

Zhao et al. studied photocatalytic reduction of CO2 in fixed bed reactor [100]. Gas mixture of CO2, H2O, and methanol was introduced into a cylindrical reactor made of stainless steel and quartz window. AgATi02 photocatalyst was coated on the glass fiber filter and placed at the bottom of the reactor. A 150 W solar simulator was located outside the reactor. The same reactor has been used by Liu et al. for photocatalytic reduction of CO2 in the presence of Cu/ri02... 

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