کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
580897 | 1453151 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Combustion synthesis and effect of LaMnO3 and La0.8Sr0.2MnO3 on RDX thermal decomposition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
Perovskite-type LaMnO3 and La0.8Sr0.2MnO3 with high specific surface areas were prepared by stearic acid gel combustion method. The obtained powders were characterized by XRD, FT-IR, SEM and XPS techniques. Their catalytic activities were investigated on thermal decomposition of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) by TG-DSC techniques. The experimental results show that LaMnO3 is a more effective catalyst than La0.8Sr0.2MnO3 for the sublimation and melting process of RDX because of its higher concentration ratio of surface-adsorbed species. And the catalytic activity of La0.8Sr0.2MnO3 is higher than that of LaMnO3 for thermal decomposition of liquid RDX. This could be attributed to its higher concentration ratios of surface oxygen and Mn4+/Mn3+. In conclusion, the concentration ratios of surface oxygen and Mn4+/Mn3+ could play key roles for RDX thermal decomposition. This study points out a potential way to develop new and more active perovskite-type catalysts for the RDX thermal decomposition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 177, Issues 1â3, 15 May 2010, Pages 554-559
Journal: Journal of Hazardous Materials - Volume 177, Issues 1â3, 15 May 2010, Pages 554-559
نویسندگان
Zhi-Xian Wei, Lin Wei, Lin Gong, Yan Wang, Chang-Wen Hu,