مقاله Preparation and Characterization of Ag/SiO2 Catalyst for Dehydrogenation of D-Limonene to p-Cymene

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  مقاله Preparation and Characterization of Ag/SiO2 Catalyst for Dehydrogenation of D-Limonene to p-Cymene دارای 2 صفحه می باشد و دارای تنظیمات در microsoft word می باشد و آماده پرینت یا چاپ است

فایل ورد مقاله Preparation and Characterization of Ag/SiO2 Catalyst for Dehydrogenation of D-Limonene to p-Cymene  کاملا فرمت بندی و تنظیم شده در استاندارد دانشگاه  و مراکز دولتی می باشد.

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بخشی از متن مقاله Preparation and Characterization of Ag/SiO2 Catalyst for Dehydrogenation of D-Limonene to p-Cymene :

سال انتشار: 1392
محل انتشار: همایش ملی کاتالیست در صنایع نفت، گاز، پتروشیمی و فولاد
تعداد صفحات: 2
نویسنده(ها):
Mahdi Izadi – Department of Chemical Engineering, Shahreza Branch, Islamic Azad University, Shahreza, Iran
sayedhamid madani – Department of Chemical Engineering, Shahreza Branch, Islamic Azad University, Shahreza, Iran
Nader Mokhtarian – Department of Chemical Engineering, Shahreza Branch, Islamic Azad University, Shahreza, Iran
fatemeh dianat – Department of Chemical Engineering, Shahreza Branch, Islamic Azad University, Shahreza, Iran

چکیده:

A Silver supported silica catalysts were synthesized by impregnation method using AgNO3 precursor based upon the silica (Aerosil 200, Degussa) support. A defined amount of silver nitrate was dissolved in deionized water. Theamount of precursor was adjusted to yield 2.2 wt.% of Ag in the above mentioned catalyst. This mixture was thenkilned in the furnace at 500C under nitrogen atmosphere .The final calcined sample was designed as Agx/SiO2 where x denotes silver loading. For comparison, silica supported catalyst containing 2.2% silver was prepared by impregnation of silica (Aerosil 200, Degussa) with an aqueous solution of silver lactate. Impregnation was followed by drying (313 K, 12 h) and calcination (at 500C for 2 h) in the flowing nitrogen. The results revealed that Ag/SiO2 prepared by AgNO3 precursor at 2.2% silver content showed the best activity for selective dehydrogenation of d-limonene to pcymene. Under the optimum conditions, the selectivity of that reaction increases by the time up to 600 minute

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