کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1619723 1516386 2010 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nanosized spinel oxide catalysts for CO-oxidation prepared via CoMnMgAl quaternary hydrotalcite route
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Nanosized spinel oxide catalysts for CO-oxidation prepared via CoMnMgAl quaternary hydrotalcite route
چکیده انگلیسی

Catalytic activity of the Co–Mn–Mg–Al mixed oxide spinel catalysts was examined in CO oxidation by O2. The prepared catalysts were characterized by chemical analysis (ICP), infrared spectroscopy (FTIR), thermal analysis (TG, DTG), powder X-ray diffraction (XRD), surface area measurements, and scanning electron microscopy (SEM).The calcined hydrotalcite-like precursor was composed of spinel-like Co–Mn–Mg–Al mixed oxide as the only XRD crystalline phases. The nanosized spinel oxide catalysts produced by calcination of hydrotalcites showed higher SBET than CoMn-hydrotalcite samples as calcination led to dehydroxylation and carbonate decomposition of anions in interlayer spaces. All the catalysts showed 100% CO conversion at high temperature even those calcined at 800 °C. A catalyst with Co/Mn = 4 and calcined at 500 °C showed 100% CO conversion at 160 °C. Moreover, this catalyst exhibited quite good durability without deactivation in 60 h stability test.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 493, Issues 1–2, 18 March 2010, Pages 376–384
نویسندگان
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