کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10244821 | 47706 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Transformation of platinum supported on silicon-doped alumina during the catalytic decomposition of energetic ionic liquid
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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چکیده انگلیسی
The stability of 10 wt% platinum supported on Si-doped alumina (Pt/Si-Al2O3) during the catalytic decomposition of energetic ionic liquid (or propellant) at 40â°C was studied. The reaction was performed by successive injections of 79 wt% HAN (hydroxylammonium nitrate NH3OHNO3) aqueous solution onto the catalysts in a constant volume batch reactor. The four studied catalysts remain active with a fast reaction rate (up to 450 mbarâsâ1), even in the presence of an excess of residual aqueous solution. For all catalysts, the structural studies reveal the presence of theta alumina associated with silica and platinum particles. After the propellant decomposition, alteration in metallic particle size is observed as is the formation of nanosized platinum agglomerates in the reaction medium, which are probably responsible for the excellent catalytic activity. A model is suggested, explaining the part played by platinum and silica particles at the surface of the materials during the propellant decomposition reaction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 232, Issue 1, 15 May 2005, Pages 10-18
Journal: Journal of Catalysis - Volume 232, Issue 1, 15 May 2005, Pages 10-18
نویسندگان
L. Courtheoux, E. Gautron, S. Rossignol, C. Kappenstein,