OP-II-3

PP-I-12COMPUTER SIMULATION OF ENDOTHERMIC PROCESSES INFLOWING REACTORS USING RADIATION ENERGYChernykh I.G. 1 , Mischenko T.I. 2 , Snytnikov Vl.N. 2 , Snytnikov V.N. 21 Institute of Computational Mathematics and Mathematical Geophysics SB RAS,pr. Ak. Lavrentieva, 6, Novosibirsk, 630090, Russia, chernykh@ssd.sscc.ru2 Boreskov Institute of Catalysis SB RAS, pr. Ak. Lavrentieva, 5, Novosibirsk, 630090,Russia, snyt@catalysis.ruA flow reactor with the reactants heated by continuous CO 2 laser radiation isproposed for studying the gas phase homogeneous reactions. Ethane pyrolysisyielding ethylene is considered as an example of such chemical process. For thisprocess, a mode of 'energetic catalysis' is feasible, where increasing energyabsorption in the volume is related with the increased content of target product. Themode of 'energetic catalysis' was implemented at transformation of laser energy intothermal power using the sensitization properties of ethylene. Three-dimensionalcalculation of the gas-dynamic reactants flows and their mixing was made with theFLUENT software package showed the presence of the modes where reaction zonewith a high content of C 2 hydrocarbons is localized in the center of reactor, which wasconfirmed by experiments.For the researches of the gas phase homogeneous reactions there was producednew chemical reactors – cruciform quartz flowing reactor [1] and multiinput cylindricalflowing reactor [2]. Ethane-ethylene gas mixture flow is perpendicular to the laserbeam in case of reactor from [1] and parallel in case of reactor from [2]. All of thesereactors have been included to the experimental setup [2] with CO 2 laser unit.Ethane-ethylene mixture consists from the ~32% of ethylene and ~68% of ethane.The main idea of new chemical reactors based on formation of compact reactionzone in the center of chemical reactors with blocking of reaction zone from the opticalwindows by the inertial gases (Ar for example). More detailed description of theexperiments is in [2]. Detailed distribution of hydrocarbons was received by thechromatographic analysis. Ethane conversion increased up to 75% with laser powerbetween 32 and 60 W/cm 2 . Maximum ethylene output was 37% with laser power40 W/cm 2 that conformed 51% of ethane conversion. Experimentally founded that theconcentration of ethylene between 4 and 6 %vol. is insufficient for the ethaneconversion starting. The reaction zone was accepted with ethylene values higherthan 6%vol. That was one of the main criteria for the forming of reaction zone during241