کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
40214 45846 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of shaped magnesium oxide/carbon catalysts using rice grains as an exotemplate and carbon precursor
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Preparation of shaped magnesium oxide/carbon catalysts using rice grains as an exotemplate and carbon precursor
چکیده انگلیسی


• An in situ transformation technique was used to prepare biomorphic shaped MgO/C.
• Nonporous rice particle was used as exotemplate and C precursor.
• The biomorphic shaped MgO/C materials exhibit good catalytic performance.

Biomorphic magnesium oxide and magnesium oxide/carbon catalysts have been synthesized via an in situ transformation technique using rice grains as a template and carbon precursor. During preparation, MgO precursors are dispersed on the surface of rice grains with the aid of the rice-cooking process, and further transformed into solid bases upon calcination. Biomorphic MgO/carbon materials are formed when calcination is performed in a nitrogen atmosphere. These particles are spindle shaped catalysts with a circumference of several millimeters. Pyrolysis at higher temperature aids in the formation of porous structures, and the resulting MgO/carbon materials display high specific surface area (>260 m2/g) and more strongly basic sites. The presence of black carbon affects the catalytic behavior of MgO in the methylation of cyclopentadiene. These shaped MgO/carbon materials exhibit much higher catalytic performance than MgO at lower reaction temperatures.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volumes 460–461, 10 June 2013, Pages 26–35
نویسندگان
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