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Activity and stability of iron-containing pillared clay catalysts for wet air oxidation of phenol

Paper ID Volume ID Publish Year Pages File Format Full-Text
44193 46007 2006 10 PDF Available
Title
Activity and stability of iron-containing pillared clay catalysts for wet air oxidation of phenol
Abstract

Catalytic wet air oxidation of an aqueous phenol solution over Fe–Al pillared catalyst was conducted in a stirred tank and packed bed reactor. Semi-batch experiments in the stirred tank reactor were designed to investigate the effects of temperature, air pressure, initial phenol concentration, catalyst loading, and catalyst size on the conversion of total organic carbon. The catalyst exhibited an important activity in degrading total organic carbon at mild conditions. Its internal mass transfer resistance was assessed over different catalyst sizes via a chosen criterion. Packed bed runs were conducted under selected temperature and pressure (170 °C, 3.2 MPa) over a long duration (240 h). Various characterization methods were employed for fresh and aged pillared clay catalysts. Occurrence of catalyst deactivation by carbonaceous deposits during the packed bed operation was observed through scanning electron microscopy (SEM) and elemental analysis. Insignificant metal leaching was observed because trace amounts of metal elements were detected in the hot acidic liquid solution.

Keywords
Catalyst characterization; Carbon deposition; Pillared clay; Phenol treatment; Wet air oxidation
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Activity and stability of iron-containing pillared clay catalysts for wet air oxidation of phenol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 299, 17 January 2006, Pages 175–184
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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