کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
44217 46009 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and characterization of turbostratic carbons prepared by catalytic chemical vapour decomposition of acetylene
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Synthesis and characterization of turbostratic carbons prepared by catalytic chemical vapour decomposition of acetylene
چکیده انگلیسی

The turbostratic mesoporous carbon blacks were prepared by catalytic chemical vapour decomposition (CCVD) of acetylene using Ni/MgO catalysts prepared by co-precipitation. The relationship between deposition conditions and the nanostructures of resultant carbon black materials was investigated. It was found that the turbostratic and textural structures of carbon blacks are dependent on the deposition temperature and nickel catalyst loading. Higher deposition temperature increases the carbon crystallite unit volume Vnano and reduces the surface area of carbon samples. Moreover, a smaller Vnano is produced by a higher Ni loading at the same deposition temperature. In addition of the pore structure and the active metal surface area of the catalyst, the graphitic degree or electronic conductivity of the carbon support is also a key issue to the activity of the supported catalyst. Vnano is a very useful parameter to describe the effect of the crystalline structure of carbon blacks on the reactivity of carbon blacks in oxygen–carbon reaction and the catalytic activity of carbon-supported catalyst in ammonia decomposition semi-quantitatively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 309, Issue 2, 1 August 2006, Pages 201–209
نویسندگان
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