کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1260060 971716 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rare earth modified Ni-Si catalysts for hydrogen production from methane decomposition
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Rare earth modified Ni-Si catalysts for hydrogen production from methane decomposition
چکیده انگلیسی

Different rare earth (RE=La, Ce, Pr, Nd, Sm, Y) and Cu modified nickel catalysts for hydrogen production from methane decomposition were synthesized by a sol-gel process and method. The catalysts were characterized or analyzed through Brumauer-Emmett-Teller (BET), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) techniques. And the hydrogen production performance was also evaluated by a fixed-bed and micro-reaction technique with CH4→C+H2 as a probe reaction. The results showed that rare earth modification had played a great role for nickel catalysts, for example, smaller nickel particles, good thermal stability, high activity, etc. La was the best additive among rare earth modification. The SEM of rare earth modified catalysts showed ordered flower-like structure and rare earth modification made the nickel particles move to the surface of catalysts. In addition, the SEM of nano-carbons was also changed by rare earth modification with long, narrow nano-carbon fibers or tubes obtained. Solid carbon formation was prevented by rare earth modification.

Graphical AbstractSEM of rare earth and Cu modified catalystsFigure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Rare Earths - Volume 32, Issue 8, August 2014, Pages 709–714
نویسندگان
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