کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
56432 47082 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural and textural evolution of Ni/γ-Al2O3 catalyst under hydrothermal conditions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Structural and textural evolution of Ni/γ-Al2O3 catalyst under hydrothermal conditions
چکیده انگلیسی

The influence of hydrothermal treatment on the structural and textural properties of Ni/γ-Al2O3 catalysts is investigated by means of X-ray diffraction (XRD), H2-TPR, TG–DSC and N2 physisorption. After hydrothermally treated at 90–150 °C and 8–48 h, the γ-Al2O3 support transforms into its hydrated phase, boehmite [γ-AlO(OH)]. And the content of γ-AlO(OH) increases with the hydrothermal temperature and time increasing. Furthermore, the hydration of γ-Al2O3 support induces the aggregation of carried Ni crystallite and decreases the BET specific surface area and pore volume, and also reduces the interaction between Ni and γ-Al2O3 support. The above structural and textural changes further cause the hydrogenation activity decay of Ni/γ-Al2O3 catalyst.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 158, Issues 3–4, 22 December 2010, Pages 475–480
نویسندگان
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