کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9759352 | 1497709 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermocatalytic decomposition of methane over activated carbons: influence of textural properties and surface chemistry
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Use of carbon-based catalyst for thermocatalytic CO2-free production of hydrogen from methane offers several advantages. In this paper, activated carbons with different textural properties and surface chemistry have been used to study the influence of these properties on the efficiency of methane decomposition. It has been shown that the initial reaction rate of decomposition is related to the surface chemistry of the catalyst, in particular to the concentration of oxygenated groups, and not to the surface area. On the other hand, the capacity to accumulate carbon before deactivation, which defines the long-term behaviour, is related to the surface area and the pore size distribution, in particular to the area in mesopores. In this way, microporous carbons with high content of oxigenated surface groups exhibit high initial conversion rates but they become rapidly deactivated. In contrast, mesoporous carbons with high surface area provide more stable and sustainable hydrogen production.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 30, Issue 3, March 2005, Pages 293-300
Journal: International Journal of Hydrogen Energy - Volume 30, Issue 3, March 2005, Pages 293-300
نویسندگان
R. Moliner, I. Suelves, M.J. Lázaro, O. Moreno,