REMOVAL AND DESTRUCTION OF BENZENE, TOLUENE, AND XYLENE FROM WASTE-WATER BY AIR STRIPPING AND CATALYTIC-OXIDATION

被引:49
作者
CHUANG, KT
CHENG, S
TONG, SM
机构
[1] Department of Chemical Engineering, University of Alberta, Edmonton, Alberta
关键词
14;
D O I
10.1021/ie00011a010
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Catalytic oxidation is an attractive way to destroy trace quantities of benzene, toluene, and xylene (BTX) from wastewater stripping emissions, but there are no data available on the air stripping and oxidation process of BTX. In the work reported here, oxidation of BTX was studied on a hydrophobic catalyst at temperatures ranging from 90 to 150-degrees-C. The catalyst was characterized by its unique hydrophobic property which facilitates the conversion of BTX with high activity at relatively low temperatures unaffected by water vapor concentrations in the system. An approach based on the Mars-van Krevelen rate mechanism was used to explain the results, revealing a high ratio of surface reduction rate constant to the surface reoxidation rate constant on the hydrophobic catalyst. The air stripping of BTX from wastewater was simultaneously studied in a small pilot-scale column to determine the condition at which low levels of BTX could be effectively stripped from water.
引用
收藏
页码:2466 / 2472
页数:7
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