Enhanced numerical simulation of photocatalytic reactors with an improved solver for the radiative transfer equation

Comprehensive Kinetics of the Photocatalytic Degradation of Emerging Pollutants in a LED-Assisted Photoreactor. S-Metolachlor as Case Study

“…The decrease in the inner part of the reactor is due to the shielding effect of the catalyst particles [41]. The same trend was observed by Moreno-San Segundo et al [42] when modeling an annular LED photoreactor.…”

Recent advances on modeling of solar heterogeneous photocatalytic reactors applied for degradation of pharmaceuticals and emerging organic contaminants in water

“…The main advantage of this approach is that it allows careful evaluation of the radiation transfer phenomena from the light emission source, considering different lamp emission models with progressively greater complexities, towards the absorption-scattering materials (photocatalyst, support materials and reactor boundaries) using the predetermined optical properties (absorption coefficients, scattering coefficients and scattering phase functions) of each of these components. Usually the solution of the resulting integro-differential radiative transfer equation is obtained using the discrete ordinates method (DOM) [13], [29], however, this approach requires a high computational demand, particularly in photoreactor systems operating with intrinsically fluctuating light sources, such as solar radiation.…”

“…Mathematical modeling of solar photocatalysis processes for removal of contaminants of emerging concern can be developed starting from the following components [7]: i) the reactive species and their associated reaction kinetics derived by a reaction mechanisms which should include the impact of the water matrix components [8], [9], ii) the semiconductor photocatalyst, where the optical, structural and surface properties of the photocatalyst are analyzed [10], [11], iii) the radiant field, including the solar emission model and the absorption-scattering model for the quantification of the LVRPA; these two models are usually linked with the Ray-Tracing boundary conditions [12], [13], and iv) the photoreactor, which connects the three previous components determining the mathematical structure of the mass transport of reacting species, the hydrodynamic conditions and the pressure and temperature distributions [14][15]. Figure 1 shows a methodological approach for the modeling of solar photoreactors for environmental applications.…”

Computer Simulations of Photocatalytic Reactors

“…In the newest research performed by Moreno-SanSegundo et al, numerical simulations of three photocatalytic reactors were demonstrated: an annular reactor illuminated by a mercury fluorescent lamp, a tubular reactor coupled to a compound parabolic collector illuminated by sunlight, and a tubular photoreactor illuminated by LEDs [84]. The authors proposed a novel discrete ordinate model integrated with open-source Open-FOAM CFD software.…”