Photokinetics of Photothermal Reactions DOI Creative Commons
Mounir Maafi

Molecules, Год журнала: 2025, Номер 30(2), С. 330 - 330

Опубликована: Янв. 15, 2025

Photothermal reactions, involving both photochemical and thermal reaction steps, are the most abundant sequences in photochemistry. The derivation of their rate laws is standardized, but integration these has not yet been achieved. Indeed, field still lacks integrated for description reactions’ behavior and/or identification order. This made difficult a comprehensive account photokinetics photothermal which created gap knowledge. addressed present paper by introducing an unprecedented general model equation capable mapping out kinetic traces such reactions when exposed to light or dark. law also applies reactive medium either monochromatic polychromatic irradiation. validity was established against simulated data obtained fourth-order Runge–Kutta method. It then used describe quantify several situations as effects initial concentration, spectator molecules, incident radiation intensity, impact latter on photonic yield. facilitated elucidation method determine intrinsic parameters (quantum yields absorptivities species) any mechanism whose number species known. contributes rationalizing along same guidelines adopted chemical kinetics.

Язык: Английский

Scaling Up Gas–Liquid Photo-Oxidations in Flow Using Rotor-Stator Spinning Disc Reactors and a High-Intensity Light Source DOI Creative Commons
Arnab Chaudhuri,

Wouter F.C. de Groot,

J. Schuurmans

и другие.

Organic Process Research & Development, Год журнала: 2025, Номер 29(2), С. 460 - 471

Опубликована: Янв. 14, 2025

Photochemical transformations have garnered renewed interest over the past decade for their ability to enable unique reactions under mild conditions. However, scaling up such processes, particularly in multiphase systems (e.g., gas–liquid), remains challenging. Previously, we demonstrated potential of photochemical rotor-stator spinning disc reactor (pRS-SDR) photooxidation α-terpinene ascaridole, though system was limited by light source, resulting suboptimal operation a photon-limited regime. In this work, unlock full pRS-SDR integrating high-powered source (up 652 W optical output) specifically designed reactor. The results show that high gas–liquid mass transfer rates achievable allow significant productivity improvements irradiance (16.3 kg day–1 at 92% conversion and 2.52 cm–2 27 mL irradiated volume), representing an order magnitude increase compared our previous study. β-citronellol exhibited notable limitations, highlighting importance selecting appropriate model when evaluating intensified reactors.

Язык: Английский

Процитировано

0
Photokinetics of Photothermal Reactions DOI Creative Commons
Mounir Maafi

Molecules, Год журнала: 2025, Номер 30(2), С. 330 - 330

Опубликована: Янв. 15, 2025

Photothermal reactions, involving both photochemical and thermal reaction steps, are the most abundant sequences in photochemistry. The derivation of their rate laws is standardized, but integration these has not yet been achieved. Indeed, field still lacks integrated for description reactions’ behavior and/or identification order. This made difficult a comprehensive account photokinetics photothermal which created gap knowledge. addressed present paper by introducing an unprecedented general model equation capable mapping out kinetic traces such reactions when exposed to light or dark. law also applies reactive medium either monochromatic polychromatic irradiation. validity was established against simulated data obtained fourth-order Runge–Kutta method. It then used describe quantify several situations as effects initial concentration, spectator molecules, incident radiation intensity, impact latter on photonic yield. facilitated elucidation method determine intrinsic parameters (quantum yields absorptivities species) any mechanism whose number species known. contributes rationalizing along same guidelines adopted chemical kinetics.

Язык: Английский

Процитировано

0