کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1272906 1497604 2010 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrogen production from ethanol steam reforming over nickel based catalyst derived from Ni/Mg/Al hydrotalcite-like compounds
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Hydrogen production from ethanol steam reforming over nickel based catalyst derived from Ni/Mg/Al hydrotalcite-like compounds
چکیده انگلیسی

Nickel based catalysts derived from thermal decomposition of Ni/Mg/Al hydrotalcite-like precursors have been studied in ethanol steam reforming (ESR) for hydrogen production. X-ray diffraction (XRD), transmission electron microscopy (TEM), temperature-programmed reduction (TPR) and thermogravimetric analysis (TGA) were used to investigate the physic-chemical properties of the catalysts prepared. The catalysts being mainly composed of Ni–Mg–O solid solution phase exhibited high activity and stability for ethanol steam reforming. Ethanol could be completely converted even at 673 K, and hydrogen concentration tended to increase with increasing reaction temperature, gas hourly space velocity (GHSV) and Ni/Mg ratio. XRD and TEM investigations demonstrate that low Ni/Mg ratio led to insufficient Ni0 phase available, which may result in decreasing activity and stability due to coke formation observed on the NiMg10 (Ni/Mg = 1/10) catalyst. High reduction pretreatment temperature (>973 K) could promote the reduction of Ni0 metal, and effectively improve the catalytic activity and stability. The optimum reduction temperature might be 1073 K, at which proper amount of Ni0 species and good resistance to coke formation could be obtained.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 35, Issue 13, July 2010, Pages 6699–6708
نویسندگان
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