کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11003258 | 1455132 | 2018 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Role of oxygen storage/supply capacity of mixed oxides of Ce and Zr in ethanol oxidation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A series of CexZr1âxO2 (x = 0.25, 0.5, 0.75) was prepared by precipitation method and wet impregnation method was employed for the synthesis of Au/CexZr1âxO2 catalysts. All prepared catalysts were characterized by XRD, TEM, EDX, TGA, and FTIR spectroscopy. Catalytic activity was studied in the temperature range of 200-350 °C and total pressure of 5 atm maintaining GHSV of 18,000 mLgcatâ1 hâ1 for oxidation of ethanol (aqueous solution with a typical concentration in bioethanol, i.e., 10 wt%). Results showed that insertion of Zr to Ce framework improved the oxygen storage capacity (OSC) which subsequently enhances supply of oxygen for the reaction and ultimately leading to increased ethanol conversion. Increased Zr content in Ce framework led to enhance ethanol conversion, while reverse trend was observed for acetaldehyde selectivity. Au/CexZr1âxO2 catalysts exhibited good catalytic behavior in terms of conversion and selectivity towards acetaldehyde and displayed time-on-stream.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Research and Design - Volume 137, September 2018, Pages 478-487
Journal: Chemical Engineering Research and Design - Volume 137, September 2018, Pages 478-487
نویسندگان
Paresh H. Rana, Parimal A. Parikh,