کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1283617 1497645 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Activated carbons as catalysts for hydrogen production via methane decomposition
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Activated carbons as catalysts for hydrogen production via methane decomposition
چکیده انگلیسی

The reaction of catalytic decomposition of methane has been studied. This reaction is considered as a promising method of hydrogen production, which is very attractive from the ecological point of view as not leading to carbon dioxide emission. The catalysts tested were activated carbons obtained from the same precursor (brown coal) by its activation with KOH, for different weight ratios of KOH to precursor and at different temperatures of the process. The microporous carbon samples obtained differed in the surface area, but were expected to have similar structure because of the common origin. According to the results of catalytic tests, no discernible correlation has been found between the surface area of the catalysts studied and their initial catalytic activity, which suggests that the number of catalytically active centres does not depend directly on the surface area of the catalysts. However, it has been found that with increasing surface area, and first of all with increasing pore volume, the resistance of the catalysts to deactivation increases. The process of pore blocking (mainly micropores) by the carbonaceous deposit formed in the reaction studied is responsible for the catalysts deactivation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 33, Issue 21, November 2008, Pages 6172–6177
نویسندگان
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