Treatment of Phenolic Effluents by Catalytic Wet Hydrogen Peroxide Oxidation over Fe2O3/SBA-15 Extruded Catalyst in a Fixed-Bed Reactor
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- 作者：Fernando Martí ; nez ; Juan Antonio Melero ; Juan Á ; ngel Botas ; M. Isabel Pariente ; Raú ; l Molina
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2007
- 出版时间：June 20, 2007
- 年：2007
- 卷：46
- 期：13
- 页码：4396 - 4405
- 全文大小：436K
- 年卷期：v.46,no.13(June 20, 2007)
- ISSN：1520-5045
文摘
Iron oxide supported over mesostructured SBA-15 material (Fe2O3/SBA-15) has been used in a fixed-bedreactor (FBR) for the catalytic wet hydrogen peroxide oxidation (CWHPO) of phenolic aqueous solutions.This catalyst is agglomerated by extrusion with different particle sizes (0.35-2 mm) using bentonite mineralclay and methyl cellulose as inorganic and organic binders, respectively. Several variables, such as the feedflow rate, the weight of the catalyst bed, and the particle size, have been studied in order to optimize theoperation conditions for phenol mineralization. Activity of catalyst in terms of phenol degradation and TOCreduction has been monitored. Internal diffusional problems by the increase of the particle size seem not toplay a dominant role in the overall catalytic performance. Loadings of catalysts higher than 2.9 g for 1 cm3/min of 1 g/L phenolic aqueous solution, equivalent to residence times 
3.1-3.8 min, have not substantiallyaffected the phenol and TOC reduction. Under the best operation conditions, complete phenol degradationand remarkable TOC conversion (ca. 66%) have been achieved at steady-state conditions. The role of Fe2O3/SBA-15 catalyst as compared to a homogeneous catalytic system and the long-term activity of the heterogeneouscatalyst have been also demonstrated for the continuous treatment of an aqueous phenolic solution.
3.1-3.8 min, have not substantiallyaffected the phenol and TOC reduction. Under the best operation conditions, complete phenol degradationand remarkable TOC conversion (ca. 66%) have been achieved at steady-state conditions. The role of Fe2O3/SBA-15 catalyst as compared to a homogeneous catalytic system and the long-term activity of the heterogeneouscatalyst have been also demonstrated for the continuous treatment of an aqueous phenolic solution.