کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
643342 884367 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of aluminum oxides surface properties on catalyzed ozonation of 2,4,6-trichloroanisole
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Influence of aluminum oxides surface properties on catalyzed ozonation of 2,4,6-trichloroanisole
چکیده انگلیسی

This paper aimed to reveal the removal effectiveness and the mechanism of catalytic ozonation in the presence of aluminum oxides (γ-AlOOH, γ-Al2O3, and α-Al2O3) for the degradation of a taste and odor compound. Results showed that catalytic ozonation in the presence of aluminum oxides can substantially enhance 2,4,6-trichloroanisole (TCA) removal compared with the sole ozonation. However, three kinds of aluminum oxides exhibited different catalytic activity in catalytic ozonation for the degradation of TCA remarkably. Scavenging experiments of hydroxyl radicals revealed that the improving removal effectiveness of TCA was due to the enhancing generation of hydroxyl radicals. The catalytic activity of the aluminum oxides was related to highly hydroxylated surface. The surface hydroxyl groups on the aluminum oxides were active sites in catalytic ozonation. The density of surface hydroxyl groups and the surface Brønsted acidity determined the difference of the catalytic activity of aluminum oxides. The higher density of surface hydroxyl groups and the stronger Brønsted acidity of the surface can remarkably enhance the catalytic activity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 66, Issue 2, 20 April 2009, Pages 405–410
نویسندگان
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