Lumped kinetic model for catalytic wet oxidation of organic compounds in industrial wastewater

Journal Article · Fri Jan 01 04:00:00 EST 1999 · AIChE Journal

DOI:https://doi.org/10.1002/aic.690450112· OSTI ID:321096

Zhang, Q; Chuang, K T ^[1]

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1. Univ. of Alberta, Edmonton, Alberta (Canada). Dept. of Chemical and Materials Engineering

A simplified reaction pathway was proposed to describe the kinetic behavior of catalytic wet oxidation of organic mixture. The oxidation reactions were divided and lumped into two groups: (1) the deep or complete oxidation reactions with formation of CO{sub 2} and H{sub 2}O; (2) The partial oxidation reactions with formation of all intermediates in aqueous solution of the industrial wastewater. The concentrations of all reactants in wastewater and those of the intermediates formed during the reaction are also represented by a lumped concentration of total organic carbon (TOC). To test the model, catalytic oxidation of organic pollutants in an effluent from a softwood Kraft pulp mill was investigated in a slurry reactor using a Pd-Pt/Al{sub 2}O{sub 3} catalyst. Sodium hydroxide was used to adjust the initial pH of wastewater to 7.3 to avoid the problem of metal leaching and excessive corrosion. The lumped kinetic model developed in this study describes well both the experimental data and those reported in literature. The lumped kinetic model proposed in this study can be used for both catalytic and noncatalytic wet oxidation processes.

• OSTI ID: 321096
• Journal Information: AIChE Journal, Journal Name: AIChE Journal Journal Issue: 1 Vol. 45; ISSN 0001-1541; ISSN AICEAC
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
CARBON DIOXIDE
CATALYSTS
CHEMICAL REACTION KINETICS
INDUSTRIAL WASTES
MATHEMATICAL MODELS
PALLADIUM
PARTIAL OXIDATION PROCESSES
PLATINUM
WASTE WATER
WATER VAPOR
WET OXIDATION PROCESSES