کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
588151 1453337 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Washcoating of cordierite honeycomb with ceria-copper mixed oxides for catalytic diesel soot combustion
ترجمه فارسی عنوان
Washcoating لانه زنبوری کوردیریت با اکسیدهای مخلوط سریا ـ مس برای احتراق دوده موتورهای دیزل کاتالیزوری
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
چکیده انگلیسی


• Ceria-based nanomaterials for soot combustion.
• A simple sol–gel method was adopted to prepare the Ce0.6Cu0.4O2 mixed oxides.
• Ce4+/Ce3+ redox couple formed facilitates oxygen transport.
• Ce0.6Cu0.4O2 has higher oxygen storage capacity.
• Cordierite supports modified with Ce0.6Cu0.4O2 can reduce soot emission during diesel burning in a stationary diesel motor.

Cordierite honeycomb monoliths coated with ceria-copper catalyst were synthesized, characterized, and used in catalytic soot oxidation. First, Ce0.6Cu0.4O2 was obtained by the sol–gel method and deposited on cordierite. The resulting material was employed to capture and oxidize soot. The coating process generated highly dispersed active species and enriched the coating surface with ceria and copper. XRD, H2-TPR, OSC, Raman spectroscopy, and SEM and TEM microscopies helped to confirm the structural and morphological properties of the material and formation of the mixed oxides. Compared with the uncatalyzed reaction, thermogravimetry analysis (TGA/DTA) of the soot oxidation in the presence of the catalysts showed that the soot oxidation temperature decreased. Raman spectroscopy studies revealed an increased number of oxygen vacancies in the Ce0.6Cu0.4O2 deposited on cordierite as compared with pure CeO2 deposited on cordierite. The coated monolithic catalyst exhibited desirable catalytic performance the soot removal rate exceeded 73% according to dynamic tests conducted in a stationary engine.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Process Safety and Environmental Protection - Volume 101, May 2016, Pages 134–143
نویسندگان
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