کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
50318 46789 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of carbon and chlorine on the performance of carbon-covered alumina supported Ru catalyst for ammonia synthesis
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Effect of carbon and chlorine on the performance of carbon-covered alumina supported Ru catalyst for ammonia synthesis
چکیده انگلیسی

Uniformly carbon-covered alumina (CCA), which was prepared by pyrolysis of sucrose, was used as support of ruthenium catalyst. Carbon did not significantly influence on the ammonia synthesis activities of Ru catalysts by changing their Ru particle sizes or Ru 3d5/2 binding energies. Residual chlorine severely suppressed ammonia synthesis by decreasing the amount of hydrogen with the desorption peak at medium temperatures. Carbon also inhibited the adsorption of this hydrogen species for chlorine-free Ru catalysts, but did not change their activities. On the other hand, carbon can increase the ammonia synthesis activities of containing-chlorine Ru catalysts by decreasing the disadvantageous effect of chlorine on H2 adsorption.

Carbon did not effect on ammonia synthesis activity by the change in Ru particle size or Ru 3d5/2 binding energy, but decreased the disadvantageous effect of chlorine on H2 adsorption for containing-chlorine Ru catalysts, and thus increased their catalytic activities for ammonia synthesis.Figure optionsDownload as PowerPoint slideHighlights
► Carbon did not effect on activity by the change in Ru particle size or Eb(Ru 3d5/2).
► Carbon decreased the disadvantageous effect of Cl on H2 adsorption.
► The activities for containing-chlorine samples with increasing carbon content.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 12, Issue 15, 15 September 2011, Pages 1452–1457
نویسندگان
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