Modelling the impact of mass transport in a miniplant photoreactor†

IF 3.4 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Reaction Chemistry & Engineering Pub Date : 2024-08-27 DOI:10.1039/D4RE00192C
Florian Gaulhofer, Henning Becker, Alexander Peschl and Dirk Ziegenbalg
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Abstract

The scale-up of photoreactions posses challenges due to the non-linear coupling of the radiation field with reaction kinetics and mass transport. A knowledge-based scale-up requires a sufficiently detailed theoretical description of these processes. In this work, a transient, two-dimensional photoreactor model is proposed and used to systematically investigate mass transport limitations in photoreactors, including the effect of transversal mass transport through static mixers and the self-shading effect of the studied homogeneous photoisomerization of a spiropyrane. Simulation results of the proposed photoreactor model indicated that mass transport along the direction of light has a major impact. The transversal dispersion would be increased by a factor of 6 by the installation of static mixers, which would allow for a 1.27 fold increase in conversion in an up-scaled photoreactor. A shrinking of the reaction zone was identified when increasing the light power, eventually limiting the reactor performance. Furthermore, a model-based scale-up study emphasized the importance of mass transport for scaling photoreactors.

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模拟微型植物光反应器中质量传输的影响
由于辐射场与反应动力学和质量传输的非线性耦合,光反应的放大面临挑战。基于知识的放大需要对这些过程进行足够详细的理论描述。本研究提出了一种瞬态二维光反应器模型,用于系统研究光反应器中的质量传输限制,包括通过静态混合器进行横向质量传输的影响,以及所研究的螺丙烷同质光异构化的自遮蔽效应。拟议光反应器模型的模拟结果表明,沿光方向的质量传输具有重大影响。通过安装静态混合器,横向分散将增加 6 倍,这将使升级后的光反应器的转化率提高 1.27 倍。在增加光功率时,发现反应区缩小,最终限制了反应器的性能。此外,基于模型的放大研究强调了质量传输对光反应器放大的重要性。
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来源期刊
Reaction Chemistry & Engineering
Reaction Chemistry & Engineering Chemistry-Chemistry (miscellaneous)
CiteScore
6.60
自引率
7.70%
发文量
227
期刊介绍: Reaction Chemistry & Engineering is a new journal reporting cutting edge research into all aspects of making molecules for the benefit of fundamental research, applied processes and wider society. From fundamental, molecular-level chemistry to large scale chemical production, Reaction Chemistry & Engineering brings together communities of chemists and chemical engineers working to ensure the crucial role of reaction chemistry in today’s world.
期刊最新文献
Back cover Ultrasound-assisted condensation cyclization reaction: fast synthesis of quinazolinones from o-aminobenzamides and aldehydes under ambient conditions† Metallic sealants increase flux and change selectivity in supported molten-salt membranes. Monitoring and controlling zeolite synthesis via reactor-based solutions: a fed-batch strategy. Back cover
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