کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
47280 46466 2010 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and characterization of bimetallic Rh-Ni/Y2O3-Al2O3 for hydrogen production by raw bioethanol steam reforming: influence of the addition of nickel on the catalyst performances and stability
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Preparation and characterization of bimetallic Rh-Ni/Y2O3-Al2O3 for hydrogen production by raw bioethanol steam reforming: influence of the addition of nickel on the catalyst performances and stability
چکیده انگلیسی

The influence of the addition of Ni on the catalytic behaviour of a Rh/Y2O3-Al2O3 catalyst (Rh/Y-Al) was evaluated in the ethanol steam reforming reaction in the presence of methyl-2-propan-1-ol as impurity. Physical-chemical properties of modified materials were determined by H2 chemisorption, XRD, BET, TPR, IR spectroscopy and TPO. It was established that the catalytic behaviour of the Rh/Y-Al base catalyst is widely improved by the addition of Ni. Nickel incorporation leads to the formation of both dispersed nickel phase and nickel aluminate species. Basic properties of the support were not modified by the addition of Ni but it was concluded to a rearrangement of acid sites. NiAl2O4 phase leads to an increase of the Lewis acid sites (LAS) of weak strength, generating a decrease of the production of coke and higher catalyst stability. It has been shown that the incorporation of Ni on the Rh/Y-Al catalyst increases the rhodium accessibility and stabilizes the rhodium particles size. Finally, the higher performances of RhNi/Y-Al catalyst were correlated to an increase in the methane steam reforming activity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis B: Environmental - Volume 97, Issues 1–2, 9 June 2010, Pages 72–81
نویسندگان
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