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
  • کد COI اختصاصی: NCOC01_016
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 1526
دانلود فایل این مقاله

نویسندگان

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 500◦C 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 500◦C 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

کلیدواژه ها

Dehydrogenation, precursor, silver nitrate, silver lactate, D-Limonene, p-Cymene

مقالات مرتبط جدید

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.