کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
51537 | 46846 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of calcination treatment on the activity of tungstated zirconia catalysts towards esterification
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In the present study, zirconia prepared by the solvothermal method was calcined under reductive (H2) and oxidative (O2) treatment to obtain ZrO2-H2 and ZrO2-O2, respectively. Then, they were impregnated with 15 wt% of tungsten (W) to produce W/ZrO2-H2 and W/ZrO2-O2 catalysts for esterification. It revealed that the presence of F-center was more dominant under the reductive treatment during calcinations of zirconia. Consequently, this can result in increased dispersion of tungsten indicating the existence of the surface monotungstates on the W/ZrO2-H2 catalyst. Therefore, the enhanced activity obtained from the W/ZrO2-H2 catalyst can be attributed to increased dispersion of tungsten and acidity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 10, Issue 7, 10 March 2009, Pages 1079–1084
Journal: Catalysis Communications - Volume 10, Issue 7, 10 March 2009, Pages 1079–1084
نویسندگان
Peangpit Wongmaneenil, Bunjerd Jongsomjit, Piyasan Praserthdam,