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Homogeneous Catalytic Hydrogenations and Photocatalytic Reactions in Microstructured Reactor Systems
Pavlorková, Jana ; Křišťál, Jiří ; Drhová, Magdalena ; Hejda, S. ; Klusoň, Petr
Microstructured reactor (MSR) systems play a key role in modern industrial processes which require obtaining products of predefined high purity and quality. MSR systems are being currently successfully used for this purpose. Their unique features rest in the high active surface to the reaction volume ratio ensuring easier and proper maintaining of reaction conditions as well as the fast heat, mass and momentum transfer. The use of MSR systems leads to the elimination of side products and consequently to the elimination of additional separation processes. This fact makes the microreactor technology more straightforward in comparison with the conventional batch reactor technology. MSR are being tested for the production of fine-chemical industry and special small-scale productions as well. Two different commercial MSR systems were tested: the microchip reactor system Labtrix (Fig. 1) and the photochemical microreactor based on the Modular Micro Reactor System (MMRS) platform. In this contribution we present these two MSR systems with their applications: the stereoselective hydrogenation, and the photochemical oxidation.
Plný tet: SKMBT_C22014092610172 -  PDF
Plný text: content.csg - PDF
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Performance of Continuous Micro Photo Reactor – Comparison with Batch Process
Drhová, Magdalena ; Hejda, S. ; Křišťál, Jiří ; Klusoň, Petr
Utilization of the flow chemistry as well as microreactors belongs to the latest trends in chemical engineering. Continuous microreactors of various kinds can be found in the literature, for example the micromixers, micro packed beds, or micro photo reactors. In order to evaluate the benefits of microtechnology application for the given process, the performance of a particular microreactor needs to be compared with the conventional setup. This contribution presents the performance of a continuous micro photo reactor in comparison with a batch process. Two model reactions were selected: the catalyzed photooxidation of 4-chlorophenol (4-CP) and the singlet oxygen chemical quencher 9,10-dimethylanthracene (DMA) in dimethylformamide. The tests were carried out using advanced opto-chemical apparatus with a well-defined light filter corresponding to the absorption bands of the used photo catalysts.
Plný tet: SKMBT_C22012102414080 - PDF
Plný text: content.csg - PDF
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