Pyrolysis of hydrocarbons in a heat-carrier flow with fast mixing of the components |
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Authors: | M G Ktalkherman I G Namyatov |
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Affiliation: | (1) Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090, Russia;(2) Institute of Chemical Kinetics and Combustion, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090, Russia |
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Abstract: | A scheme of autothermal pyrolysis of hydrocarbons in a reactor with fast mixing of the feedstock with a high-temperature heat-carrier
flow is considered. The possibility of providing fast mixing of the components is verified in a series of aerodynamic experiments
in a model setup, where the optimal geometry of the mixer for operation conditions of the pyrolysis reactor is determined.
An experimental reactor is designed and manufactured for verification of the concept proposed. A scheme of the propane pyrolysis
reactor is given. Products of combustion of a hydrogen-air mixture are used as a heat carrier. Experimental distributions
of the flow temperature and concentration of the injected substance at the exit of the reactor agree with results obtained
in the model setup. The mixing time is demonstrated to be smaller than the residence time of the mixture in the reactor mixer
by more than an order of magnitude, which allows the process to be arranged under controlled conditions. In addition to experimental
research, several detailed kinetic schemes of hydrocarbon pyrolysis are tested on the basis of available experimental data.
Results of kinetic calculations for the operation conditions of the experimental setup are presented.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 5, pp. 38–44, September–October, 2008. |
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Keywords: | high-temperature pyrolysis propane mixing kinetic scheme |
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