Photoreactor Design Aspects and Modeling of Light

Recent progress on Ag/TiO2 photocatalysts: photocatalytic and bactericidal behaviors

“…In fact, various types and geometries of photoreactors have been used in photocatalytic wastewater treatment including the plate reactor, annular flow reactor, packed-bed reactor, cascade reactor, fixed-bed reactor, etc. (Mazierski et al 2016;Sacco et al 2020). The selection of the photocatalytic reactor depends strongly on the experimental conditions, the type of the photon source (artificial or solar radiations), the mode of operation, and the type of the photocatalyst as well (Abdel-Maksoud et al 2016;Rincón and La Motta 2019).…”

Fabrication, functionalization and performance of doped photocatalysts for dye degradation and mineralization: a review

“…The aim of this section is not to make an elaborate review (which might otherwise be viewed as redundant) of all the recent types of photocatalytic reactors employed in the remediation of organic pollutants such as dyes or pharmaceuticals, but rather to take stock of some of the salient reactor design parameters, operational process variations and key findings of recently designed and assessed photocatalytic reactors using photocatalysts (both dispersed and immobilized) for dye degradation. At this stage, the reader is welcomed to browse the following excellent reviews (amongst others) which have been published recently on photocatalytic reactors and given a broad range of useful information on the topic: Argurio et al 2018whereby the use and numerous characteristics of photocatalytic membranes in photocatalytic membrane reactors have been extensively discussed; Zheng et al (2017) wherein a very large number of photocatalytic membrane reactor configurations and the related influencing factors for operations have been discussed; Abdel-Maksoud et al (2016) whereby the selection criteria of reactor design for scale-up purposes and potential commercialization of titania-based solar photocatalytic reactor systems have been analytically reviewed; Mazierski et al (2016) who classified and described a number of photoreactors used for gas phase and liquid phase reactions; Iglesias et al (2016) who performed a critical review and comparison of photocatalytic processes which include membranes, photocatalysis and membrane filtration and photocatalytic membrane reactors, identified the related process intensification indices and reflected on the future trends; Zhang et al (2016) who reviewed the research and development advances achieved in membrane fouling mechanisms of photocatalytic membrane reactors, the influences and interactions of photocatalytic processes on membrane fouling, and various fouling control approaches; Molinari et al (2017) whereby the different application of various photocatalytic membrane reactor configurations in water treatment for the degradation of organic pollutants and in the preparation of synthesis of organic compounds have been critically reviewed; Sundar and Kanmani (2020) who have recently extensively reviewed 24 photocatalytic reactor designs and compared them using the following benchmarks: apparent reaction rate constant, photocatalytic space-time yield, space-time yield, specific removal rate and electrical energy consumption, and then inferred that the design of a photocatalytic reactor requires the careful consideration of reactor throughput, performance of reactor system, energy efficiency of system and the cost; and last but not least, Kumari et al (2020) who have compared photocatalytic membrane reactors on account of the degradation rate of some common POPs found in wastewater.…”

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO2

“…The quantum yield of the reaction in the gas phase is much higher than that one in aqueous solution due to lower light scattering. Also, a lower irradiation intensity is required to perform the photocatalytic reaction in the gas phase [ 8 , 49 ].…”