Deep catalytic oxidation of aromatic hydrocarbon mixtures: Reciprocal inhibition effects and kinetics
- Politecnico di Torino (Italy). Dipt. di Scienza dei Materiali e Ingegneria Chimica
Deep catalytic oxidation of gas emissions containing volatile organic compounds (VOC) is a widely employed technology for air pollution control. The deep catalytic oxidation kinetics of different aromatic hydrocarbons, in lean mixtures, over a Pt catalyst has been investigated. The reactivity increases in the order benzene > toluene > ethylbenzene > o-xylene > styrene. An apparent zeroth-order kinetics with respect to hydrocarbon concentration has been observed; the dependence on the oxygen partial pressure is more complex. Experiments with mixtures containing up to four hydrocarbons have been carried out. Remarkable effects on reaction rate and selectivity have been evidenced; the strongest inhibiting effect is shown by styrene and increases in a reverse order with respect to that of reactivity. A significant increase in the ignition temperature may occur in real burners. A kinetic model assuming strong irreversible adsorption of the aromatics and nonequilibrium adsorption of the oxygen over different sites has been proposed.
- OSTI ID:
- 6592945
- Report Number(s):
- CONF-940301--
- Journal Information:
- Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 33:12; ISSN IECRED; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
ALKYLATED AROMATICS
AROMATICS
BENZENE
CATALYTIC COMBUSTORS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTORS
CONTROL
ELEMENTS
HYDROCARBONS
KINETICS
MATTER
METALS
ORGANIC COMPOUNDS
OXIDATION
PLATINUM
PLATINUM METALS
POLLUTION CONTROL
REACTION KINETICS
STYRENE
TOLUENE
TRANSITION ELEMENTS
VOLATILE MATTER
XYLENES