A new system design for photocatalytic degradation using diode laser: Mathematical modelling, thermal and flowing analysis and kinetic study

Abstract

A new, eco-friendly laser photodegradation system was designed, configured and performed. The Laser Flowing System (LFS) was determined as the most effective system in photodegradation of metoprolol-tartrate (MPT). Optimum conditions for ultimate photodegradation were obtained using 0.3 W (445 nm) peak power, 0.1 M hydrogen peroxide, 40 mg hematite-magnetite catalyst mixture in the 5 h of treatment time. The photodegradation yields were determined as 87.6%, and 45.45%, based on UV and COD analyses, respectively. The other parts of the study were thermal and flow analysis and kinetic study. The photodegradation was not affected by thermal and flow effects according to the thermal and flow analysis. In the and kinetic analysis, photodegradation proceeded concerning the zero-order and first-order reactions. The occurred reactions were demonstrated with the sensitivity of 97.65% and 96.79%, respectively. The half-life time of the photodegradation was calculated for both the zero-order reaction and the first-order reaction and the harmonies between the experimental and the theoretical data were observed as 99.9% and 99.51% for the zero and first-order reactions, respectively. The quantum yield of the photodegradation was calculated as 4.1 × 10-4.