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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.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22014092610171 - PDF
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Black and White Oils Partial Oxidation on Pilot Plant Unit
Hanika, Jiří ; Lederer, J. ; Nečesaný, F. ; Nečesaný, F., jr. ; Poslední, W. ; Tukač, V. ; Veselý, Václav
Based on pilot plant experiments the paper describes basic parameters influence on selectivity of partial oxidation process. The gaseous product composition was very similar to Unipetrol RPA plant process parameters operating by Shell technology. During pilot plant tests also soot was present in the raw gas. The soot amount was slightly higher because the pilot plant reactor operated at temperature below 1200 °C, see4. Investigation of physicochemical properties samples of soot is under way now and results will be presented in another our paper. At present another effort is focused to numerical POX process model formulation. Comparison of experimental data and simulation results will be reported later.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22014092610170 - PDF
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Partial Oxidation of High-Boiling Hydrocarbon Mixtures on the Pilot Unit
Hanika, Jiří ; Lederer, J. ; Nečesaný, F. ; Nečesaný, F., jr. ; Poslední, W. ; Tukač, V. ; Veselý, Václav
The research on partial oxidation (POX) of high-boiling hydrocarbons with oxygen in the presence of water vapor was motivated to ensure increased demand on hydrogen, which is essential for a deeper hydrorefining of petroleum oils to ensure better quality of motor fuels. Experiments on improved pilot apparatus installed in Litvínov, UNIPETROL, a.s. have been implemented in cooperation the Institute of Inorganic Chemistry, a.s., Ústí n. l., Institute of Chemical Process Fundamentals AS CR, v. v. i., and Institute of Chemical Technology Prague. In the course of tests have been demonstrated good performance of the pilot plant unit and reproducibility of the experiment as well. A significant impact water vapor on the selectivity of the partial oxidation of high-boiling hydrocarbons with regard to the composition of the exhaust gas was detected in the study. Furthermore, it was stated that hydrogen content of the reaction product being during the partial oxidation of mixture of visbreaking distillate and residue, diluted with pyrolysis fuel oil reached 50 percent. Content of components in a gaseous product was in very good conformity with a synthesis gas composition produced by the plant unit of the UNIPETROL RPA Co., designed and build according to the license of the Shell Co.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22013102415180 - PDF
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