کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
55994 47068 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of nitrogen on the catalytic behaviour of Pt/γ-Al2O3 catalyst in glycerol reforming process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Influence of nitrogen on the catalytic behaviour of Pt/γ-Al2O3 catalyst in glycerol reforming process
چکیده انگلیسی

In the present work, deactivation behaviour of a Pt/γ-Al2O3 catalyst used for converting glycerin/water mixture into hydrogen was investigated. It was shown that main reason for the catalyst activity drop is due to the carbon deposition over the catalyst surface. Interestingly, the catalyst suffered from faster deactivation in the case of nitrogen presence in the inlet stream. However, the catalytic stability of the catalyst could be greatly enhanced when nitrogen was phase out from the reaction atmosphere. In the reaction mixture containing 10 wt% glycerol, the deactivation constant of the catalyst decreased from dA = −0.0516 mL/(min gcat. h) under a condition with nitrogen to dB = −0.0051 mL/(min gcat. h) without nitrogen in the reaction bed. Catalytic evaluation and thermogravimetric analysis revealed that nitrogen was not only an inert carrier gas served as but also an accelerator for coking. A speculation model was proposed for explanation of the coking process over the catalyst with the nitrogen effect.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 166, Issue 1, 30 May 2011, Pages 123–128
نویسندگان
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