کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7721119 | 1497514 | 2013 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improved catalysts for hydrogen/deuterium exchange reactions
ترجمه فارسی عنوان
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
The hydrogen isotope exchange reaction between hydrogen and water is a key process in water detritiation and heavy water production. To improve the characteristics of hydrophobic catalysts for this type of reaction, foamed and cellular structures of hydrophobic catalysts were successfully prepared by adding a blowing agent. The mean particle size of Pt nanoparticles was 2.3Â nm. The proportions of elemental Pt and Pt oxides were 62% and 38%, respectively. The addition of polymethyl methacrylate powder decreased internal diffusion of water vapor and hydrogen inside the catalyst and improved active site utilization. As a result, the catalytic activities of the hydrophobic catalysts are significantly higher than those of conventional hydrophobic catalysts for hydrogen isotope exchange. All catalysts exhibited excellent hydrophobic performances after 30 days of testing. It was reasonable to mix Pt/C catalysts, polytetrafluoroethene and polymethyl methacrylate in a ratio of 1:2:1 before hydrophobic treatment. Finally, the mechanisms of hydrogen-water diffusion and exchange were investigated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 31, 17 October 2013, Pages 13596-13603
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 31, 17 October 2013, Pages 13596-13603
نویسندگان
Linsen Ye, Deli Luo, Wan Yang, Wensheng Guo, Qinying Xu, Chunli Jiang,