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Hydrogenation of Isobutene in Fixed Bed Microreactor - Long Term Experiments
Vajglová, Zuzana ; Stavárek, Petr ; Křišťál, Jiří ; Kolena, J. ; Jiřičný, Vladimír
Aliphatic hydrocarbons with 4 – 5 carbon chain are very valuable starting materials for the steam cracking process. In terms of volume, the C4 and C5 fractions are the most important by-product streams from the pyrolysis of naphtha and other liquid raw materials. Total hydrogenation of C4 and C5 fraction is a way how to produce a high-quality raw material for pyrolysis, which in comparison with a simple recycle olefin (non-hydrogenated) fractions provides higher yields of ethylene and propylene and does not shorten the operating period of the pyrolysis furnaces by excessive coking1,2. For better understanding of the C4 fraction hydrogenating process, reaction kinetic study was performed in laboratory conditions. The hydrogenation of 2-methylpropene (isobutene) on platinum catalyst was investigated experimentally as a model reaction. The effort was focused on development of the methodology of kinetic data collection under the kinetic regime. To have a representative kinetic data, results reproducibility and process stability within several days on-stream was investigated.
Plný tet: SKMBT_C22014092610171 -  PDF
Plný text: content.csg - PDF
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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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