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Studies on the ZrO2 Supported Noble Metal Catalysts for Catalytic Wet Oxidation

Author: HeYu
Tutor: SunChengLin
School: Dalian Institute of Chemical Physics
Course: Environmental Engineering
Keywords: ZrO2 surface area supported catalysts catalytic wet oxidation
CLC: X703
Type: Master's thesis
Year: 2004
Downloads: 269
Quote: 0
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Abstract


Catalytic wet air oxidation (CWO) is an attractive method for waste waterwhich is too dilute to incinerate and too concentrated for biological treatment. Itcan be defined as the oxidation of organic and inorganic substances in an aqueoussolution or suspensionby means ofoxygen or air at elevated temperatures andpressures.Although many supports such as TiO2, CeO2 and Al2O3 have been thoroughlyinvestigated for catalytic wet oxidation (CWO), researches about noble metalsupported on ZrO2 are seldom reported, due to lower activity of ZrO2 comparedwith the supports mentioned above. ZrO2 employed in the past CWO investigationis invariably low surface area prepared through conventional route.In these research works, high surface area ZrO2 was briefly preparedthroughdigesting hydrous zirconia without adding surfactants. Low surface area ZrO2 wasalso prepared for comparison. Based on these two kinds of supports, Ru, Ptcatalysts showed effective activity to decompose phenol, acetic acid, ammoniaand actual industrial waste water. Especially, noble metal catalysts supported onhigh surface area ZrO2 were remarkably more active and more stable than those ofsupported on low surface area ZrO2.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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