Optimization of Preparation Factors for Cerium Oxide Synthesis as a Support for CO PrOx Catalyst

  • سال انتشار: 1393
  • محل انتشار: فصلنامه هیدروژن و پیل سوختی ایران، دوره: 1، شماره: 3
  • کد COI اختصاصی: JR_IJHFC-1-3_006
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 371
دانلود فایل این مقاله

نویسندگان

Najmeh Hoshyar

Hydrogen and Fuel Cell Research Laboratory, Chemical Engineering Department, University of Kashan, Kashan, Iran

Abdullah Irankhah

Hydrogen and Fuel Cell Research Laboratory, Chemical Engineering Department, University of Kashan, Kashan, Iran

چکیده

Nanocrystalline ceria has been considered as support for carbon monoxide preferentially oxidation. In this study ceria was prepared by precipitation method and the effects of preparation conditions, such as pH of solution (8-10), aging time (1-12 hr), drying temperature (80-120°C), calcination time (2-6 hr) and temperature (400-600°C) were investigated on ceria synthesized powders properties. Nanocrystalline ceria were characterized by thermal gravimetric analysis (TGA),X-ray diffraction (XRD) and ASAP analysis. Calcination temperature and pH of solution have the highest effect on powder specific area. Finally, optimum conditions for the synthesis of cerium oxide in this study are pH = 10, aging time = 6 hr, drying temperature = 120°C, calcination time = 6 hr, and temperature = 500°C. Crystalline size of ceria is lower than 20 nm and in the shape of sphere-like and maximum surface area is 74.45 m2/g. 7%CuO/CeO2 catalyst was prepared by wetness impregnation method and was tested in catatest for oxidation of CO in presence of hydrogen (preferentially oxidation, PrOx). The CO conversion and CO2 selectivity was achieved 57.3 – 98% and 83-40% by temperature increasing from 80-180 °C, respectively.

کلیدواژه ها

Ceria,Experimental design,Nanocrystalline,Precipitation,CO PrOx,

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.