کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
76496 49141 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of mesoporous Ce1−xZrxO2 (x = 0.2−0.5) and catalytic properties of CuO based catalysts
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Synthesis of mesoporous Ce1−xZrxO2 (x = 0.2−0.5) and catalytic properties of CuO based catalysts
چکیده انگلیسی

Mesoporous Ce1−xZrxO2 (m-Ce1−xZrxO2, x = 0.2−0.5) mixed oxides were synthesized by using polyol method. The influences of coefficient x on performances of m-Ce1−xZrxO2 and Cu based catalysts towards CO selective oxidation in H2-rich gas were investigated. The samples were characterized by means of XRD, Raman, FT-IR, TG, BET, TEM, TPR and TPD techniques. The results showed that all m-Ce1−xZrxO2 samples were mesoporous materials with cubic fluorite-structure, and the highest surface area (181 m2 g−1) was obtained when the x = 0.5. Compared with CuO/m-Ce1−xZrxO2 (x = 0.2−0.35) catalysts, the CuO/m-Ce0.5Zr0.5O2 catalyst had higher CO conversion and selectivity in H2-rich gas, they were 100% and 96.2% at 383 K, respectively. This is explained in terms of its stronger interaction between active ingredient and support, higher dispersion, more active sites, larger CO adsorption amount and lower desorption temperature, which were advantageous to enhance its catalytic activity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microporous and Mesoporous Materials - Volume 119, Issues 1–3, 1 March 2009, Pages 158–164
نویسندگان
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