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Effects of temperature and Cu 2+ catalyst on liquid‐phase oxidation of industrial wastewaters
Author(s) -
Chang Chiehming J.,
Lin JungChou,
Chen ChungKuo
Publication year - 1993
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280570410
Subject(s) - wet oxidation , petrochemical , catalysis , chemistry , hydrocarbon , batch reactor , diffusion , toluene , catalytic oxidation , aqueous two phase system , aqueous solution , chemical engineering , solvent , homogeneous , inorganic chemistry , organic chemistry , thermodynamics , physics , engineering
Wet air oxidation is a process in which partial oxidations arise in an aqueous medium. Elevated temperature and pressure have enhanced solvent power for both oxygen in air and organics in wastewaters. Oxidations have therefore been carried out either in a kinetic‐controlling or in a diffusion‐controlling operation. Spent caustic and neutralized wastewaters obtained from a petrochemicals‐manufacturing process, were employed in this study for wet oxidation in a semi‐batch reactor. Temperature was indicated by preliminary kinetic data to be the primary factor influencing a situation where there was little control by diffusion. The oxidation reactions of hydrocarbon organic compounds were demonstrated to be enhanced if Cu 2+ was used as the catalyst. Designing and developing wet oxidation for processing industrial wastewaters was pursued in this present study by successfully adopting homogeneous kinetic models which were, subsequently, employed for calculating rate constants of oxidation reactions by correlating organics removal efficiency with oxidation time.