کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6448845 1642730 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Editor's choice paperEffect of the redox properties of support oxide over cobalt-based catalysts in high temperature water-gas shift reaction
ترجمه فارسی عنوان
کاغذ انتخاب سردبیر تاثیر خواص بازتولید اکسید حمایت بر روی کاتالیزورهای کبالت در واکنش تغییر آب و گاز با درجه حرارت بالا
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


- The reducibility of support oxide affects the dispersion of cobalt over the support.
- Performance of the catalyst was improved with the increase of support reducibility.
- The higher reducibility of support oxide results in the higher dispersion of cobalt.

The present study focused on the effect of reducibility of support oxide (CeO2, ZrO2, TiO2, and Al2O3) over the activity of cobalt-based catalysts in high temperature water-gas shift (HT-WGS) reaction. The H2 temperature programmed reduction (TPR) and CO chemisorption characterization results showed that dispersion of cobalt over the support was increased with the increase of the reducibility of the support oxide. The supported catalysts were characterized by X-ray diffraction (XRD) and N2 adsorption-desorption. The results indicated that the Co/CeO2 catalyst possesses the highest surface area and metal dispersion in the series; Co/CeO2 > Co/ZrO2 > Co/Al2O3 > Co/TiO2. The activity results showed that Co/CeO2 was the highly active among the tested catalysts in the temperature range of 350-550 °C. Moreover, the time-on-stream study revealed that the Co/CeO2 catalyst was relatively more stable than cobalt supported on ZrO2 and Al2O3 oxides. The excellent activity and stability of the Co/CeO2 catalyst were attributed to its high metal dispersion, which is found strongly dependent on the reducible nature of the support.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Molecular Catalysis - Volume 433, May 2017, Pages 145-152
نویسندگان
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