کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10244484 | 47690 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of phosphorous modifier on V2O5/TiO2 catalyst: ODH of propane
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of phosphorous modifier on V2O5/TiO2 catalyst: ODH of propane Effect of phosphorous modifier on V2O5/TiO2 catalyst: ODH of propane](/preview/png/10244484.png)
چکیده انگلیسی
The effect of the P/V ratio on the structure, properties, and reactivity of titania-supported vanadia is evaluated. The Raman spectra and temperature-programmed reduction studies reveal a progressive PV interaction with increasing P/V ratio until nanoscaled αI-VOPO4 forms above a monolayer. Propane oxidative dehydrogenation (ODH) studies reveal that the conversion and selectivities of the catalysts strongly depend on the PV interaction. For a Mars-van Krevelen model, kinetic parameters are successfully estimated by minimization of an objective function with the use of a genetic algorithm. With an increase in the P/V ratio the kinetic parameters reveal a progressive decrease in the primary ODH reaction rate constant and in the rate constant ratio for propene degradation to propene formation. The decrease in the rate constant ratio for propene degradation and propene formation with increasing P/V ratio leads to a more efficient catalyst. Thus, with the proper design of the catalyst the propene yield can be increased.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 233, Issue 2, 25 July 2005, Pages 388-398
Journal: Journal of Catalysis - Volume 233, Issue 2, 25 July 2005, Pages 388-398
نویسندگان
Rudra Pratap Singh, Miguel A. Bañares, Goutam Deo,