کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10239144 | 46032 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of pressure on H/D exchange during n-octane conversion with Pt-SiO2 catalysts
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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چکیده انگلیسی
For atmospheric conditions a hydrocarbon undergoes dehydrocyclization by a mechanism that involves nearly irreversible adsorption of the reactant. Hence, there is essentially no H/D exchange when a mixture of D2 and hydrocarbon are passed over the catalyst. The current study shows that this is not the case for conversions at higher pressures (6.8Â atm; 0.69Â MPa). At the higher pressure, there is exchange of H and D to produce a nearly statistical distribution of H and D in the unconverted reactant as well as the products. The pressure dependence is consistent with a mechanism in which the H2(D2) pressure limits the second dehydrogenation step. This mechanism accounts for the H2 dependence of both H/D exchange and the competitive conversion of a mixture of alkane and cycloalkane.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 289, Issue 1, 2 August 2005, Pages 28-36
Journal: Applied Catalysis A: General - Volume 289, Issue 1, 2 August 2005, Pages 28-36
نویسندگان
Yuguo Wang, Burtron H. Davis,