Single-Phase Flow in a Micro-Structured Packed Bed Photo-Reactor: Effect of Packing Size on Flow Regime and on the Reactor Performance for Homogeneous Photocatalysis

Ramos, Bruno; Couri, Atieh Parisi; Teixeira, Antônio Carlos Silva Costa

doi:10.26434/chemrxiv.6726395.v1

Cited by 2 publications

(1 citation statement)

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“…This is in line with the observations in the work of Cambié et al [43]. Ramos et al also confirmed that the utilization of a transparent packed material increased the apparent reaction rate by a 4-fold compared to an iron packing material [68]. Therefore, a translucent material should be preferred in photoreactors.…”

Section: Photon Transportsupporting

confidence: 86%

Dawn of a new era in industrial photochemistry: the scale-up of micro- and mesostructured photoreactors

Kayahan

Jacobs

Braeken³

et al. 2020

Beilstein J. Org. Chem.

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Photochemical activation routes are gaining the attention of the scientific community since they can offer an alternative to the traditional chemical industry that mainly utilizes thermochemical activation of molecules. Photoreactions are fast and selective, which would potentially reduce the downstream costs significantly if the process is optimized properly. With the transition towards green chemistry, the traditional batch photoreactor operation is becoming abundant in this field. Process intensification efforts led to micro- and mesostructured flow photoreactors. In this work, we are reviewing structured photoreactors by elaborating on the bottleneck of this field: the development of an efficient scale-up strategy. In line with this, micro- and mesostructured bench-scale photoreactors were evaluated based on a new benchmark called photochemical space time yield (mol·day−1·kW−1), which takes into account the energy efficiency of the photoreactors. It was manifested that along with the selection of the photoreactor dimensions and an appropriate light source, optimization of the process conditions, such as the residence time and the concentration of the photoactive molecule is also crucial for an efficient photoreactor operation. In this paper, we are aiming to give a comprehensive understanding for scale-up strategies by benchmarking selected photoreactors and by discussing transport phenomena in several other photoreactors.

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Section: Photon Transportsupporting

confidence: 86%