Kinetic study of photocatalytic degradation of Ifos famide in a microchannel and simulation

Abstract

Among the possible solutions for the intensification of photocatalytic reactions, the use of microreactors is emerging. Such an approach was applied to the photodegradation of Ifosfamide in a flow microreactor with an immobilized catalyst composed of ZnO sensitized with CuInZnxS2+x quantum dots. The conversion yield at a low flow rate was investigated. A computational flow simulation allows to determine an apparent constant rate and the diffusion coefficient towards the photocatalyst surface. Photocatalytic degradation of Ifosfamide can be fitted by the Langmuir-Hinshelwood model. The Sherwood number and the average value of Damköhler show that the photocatalytic reaction under our experimental conditions is limited by the mass transfer.

Modelling of a recirculating photocatalytic microreactor implementing mesoporous N-TiO2 modified with graphene

“…It is worthy of note that the N-TiO 2 /rGO film used in this study is highly porous thereby leading to significant adsorption. The use of compact non-porous film typically results in minor or negligible dark adsorption and greater degradation rate as reported in literature [12,27].…”

“…( 14) and ( 20) had previously been used by ref. [10][11][12]24] to model the degradation of salicylic acid in a photocatalytic microreactor with a single rectangular microchannel. It is worthy of note that the developed model herein is strictly transport-based and we did not include any radiation model since the experiment was run at a constant light intensity.…”