کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9694022 | 1459637 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of acidic and redox properties of Ce-Mo-O catalysts for the selective oxidation of toluene
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Characterization of acidic and redox properties of Ce-Mo-O catalysts for the selective oxidation of toluene Characterization of acidic and redox properties of Ce-Mo-O catalysts for the selective oxidation of toluene](/preview/png/9694022.png)
چکیده انگلیسی
The surface acidic and redox properties of CeO2, MoO3, mechanically mixed CeO2-MoO3 and co-precipitated Ce-Mo-O catalysts were characterized by using microcalorimetric adsorption of ammonia and isopropanol (IPA) probe reaction, and the surface properties of these catalysts were correlated with their selectivity for the oxidation of toluene to benzaldehyde and benzoic acid. With the presence of O2, IPA converted to propylene and diisopropyl ether on acidic sites while converted to acetone on redox sites. It was found that CeO2 exhibited mainly the redox property while MoO3 the surface acidity. The IPA probe reaction showed that the mechanically mixed CeO2-MoO3 exhibited the surface acidic property, similar to that of MoO3, indicating that the surface of CeO2 might be covered by MoO3 in the mixture upon the calcination at 773Â K. On the other hand, the co-precipitated Ce-Mo-O catalyst showed the equivalent acidic and redox properties, and thereby the selectivity to benzaldehyde was greatly enhanced on it as compared to the other catalysts studied in this work.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 434, Issues 1â2, 15 August 2005, Pages 50-54
Journal: Thermochimica Acta - Volume 434, Issues 1â2, 15 August 2005, Pages 50-54
نویسندگان
Mingwei Xue, Xiaodong Gu, Jieping Chen, Huiliang Zhang, Jianyi Shen,