Kinetic Modeling of the Decomposition of Carbon Tetrachloride
in Thermal Plasma |
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Authors: | Tamás?Kovács Tamás?Turányi Email author" target="_blank">Katalin?F?gleinEmail author János?Szépv?lgyi |
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Institution: | (1) Department of Physical Chemistry, Eötvös University (ELTE), 1518 , P.O. Box 32, Budapest, Hungary;(2) Research Laboratory of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, 1525, P.O. Box 17, Budapest, Hungary |
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Abstract: | Decomposition of carbon tetrachloride in a RF thermal
plasma reactor was investigated in argon atmosphere. The net
conversion of CCl4 and the main products of its decomposition
were determined from the mass spectrometric analysis of outlet
gases. Flow and temperature profiles in the reactor were
calculated and concentration profiles of the species along the
axis of the reactor were estimated using a newly developed
chemical kinetic mechanism, containing 12 species and 34 reaction
steps. The simulations indicated that all carbon tetrachloride
decomposed within a few microseconds. However, CCl4 was partly
recombined from its decomposition products. The calculations
predicted 70\% net conversion of CCl4, which was close to the
experimentally determined value of 60\%. A thermodynamic
equilibrium model also simulated the decomposition. Results of the
kinetic and thermodynamic simulations agreed well above 2000 K.
However, below 2000 K the thermodynamic equilibrium model gave
wrong predictions. Therefore, application of detailed kinetic
mechanisms is recommended for modeling CCl4 decomposition under
thermal plasma conditions. |
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Keywords: | Carbon tetrachloride thermal plasma decomposition |
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