کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1291882 | 973375 | 2006 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A study of the surface properties and steam reforming catalytic activity of nickel powders impregnated by n-alkanethiols
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A study of the surface properties and steam reforming catalytic activity of nickel powders impregnated by n-alkanethiols A study of the surface properties and steam reforming catalytic activity of nickel powders impregnated by n-alkanethiols](/preview/png/1291882.png)
چکیده انگلیسی
The surface properties and catalytic activity of nickel powders impregnated with n-alkanethiols (H-(CH2)n-SH, n = 4, 5, 6, and 10) for the steam reforming of methane have been studied. The quantity and state of carbon and sulfur on fresh and used thiol-contaminated Ni catalysts were determined using XPS. The high catalytic activity and stability of Ni-C4S and Ni-C5S catalysts were similar to those of pristine Ni catalysts. However, the activity of Ni-C6S catalysts decreased for temperatures above â¼580 °C and no activity was obtained over the Ni-C10S at any temperature. Catalytic deactivation was principally caused by high surface coverages of aromatic carbon. The surface aromatic-carbon was due to the pyrolysis of the pre-adsorbed n-alkanethiols and not from the feed-gas methane. The aromatic carbon leads to the deactivation of the catalyst for the steam reforming of methane at coverages above â¼4.6%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 162, Issue 1, 8 November 2006, Pages 579-588
Journal: Journal of Power Sources - Volume 162, Issue 1, 8 November 2006, Pages 579-588
نویسندگان
S. Rakass, H. Oudghiri-Hassani, N. Abatzoglou, P. Rowntree,