Catalytic oxidation of organics in aqueous solutions: I. Kinetics of phenol oxidation

Journal Article · Mon Jun 01 04:00:00 EDT 1992 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(92)90038-J· OSTI ID:7016920

Pintar, A ^[1]; Levec, J ^[2]

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1. Boris Kidric Inst. of Chemistry, Ljublgana (Slovenia)
2. Univ. of Ljubljana (Slovenia)

Liquid-phase oxidation using a solid catalyst provides a potential method for removal of dissolved toxic organic pollutants from waste waters. Catalytic oxidation of phenol in an aqueous solution was studied in a semibatch slurry reactor. A catalyst comprising ZnO, CuO, and Al[sub 2]O[sub 3] was found to be effective for converting phenol to nontoxic compounds via different intermediate products at pressures slightly above atmospheric and temperatures below 130 C. Rate measurements showed that the reaction progressed autocatalytically and involved a heterogeneous-homogeneous free radical mechanism and stepwise addition polymerization. The proposed rate equation for the phenol disappearance, which exhibits linear behavior with respect to the phenol concentration and one-fourth power of the oxygen partial pressure, is expressed in terms of the initial phenol concentration as well as the catalyst concentration. Apparent activation energy for the catalytic oxidation of phenol was found to be 84 kJ/mol in a temperature range of 105 to 130 C.

• OSTI ID: 7016920
• Journal Information: Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 135:2; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
54 ENVIRONMENTAL SCIENCES
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
ACTIVATION ENERGY
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AQUEOUS SOLUTIONS
AROMATICS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COPPER COMPOUNDS
COPPER OXIDES
DISPERSIONS
ENERGY
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
KINETICS
LIQUID WASTES
MIXTURES
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHENOL
PHENOLS
POLYMERIZATION
QUANTITY RATIO
REACTION INTERMEDIATES
REACTION KINETICS
SOLUTIONS
TRANSITION ELEMENT COMPOUNDS
WASTE WATER
WASTES
WATER
WATER TREATMENT
ZINC COMPOUNDS
ZINC OXIDES