کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
42615 | 45933 | 2009 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Doped Ni Thin Layer Catalysts for Catalytic Decomposition of Natural Gas to produce hydrogen Doped Ni Thin Layer Catalysts for Catalytic Decomposition of Natural Gas to produce hydrogen](/preview/png/42615.png)
Doped Ni-based Thin Layer Catalysts (Ni-TLCs) for Catalytic Decomposition of Natural Gas (CDNG) were investigated using a new Multilayer Catalytic Reactor (MCR). The influence of K, La, Mg and Cl on activity–stability patterns of a Ni-TLC catalyst was evaluated. An inverse straight-line relationship between carbon capacity (C/Ni, number of CH4 molecules decomposed for Ni atom until complete deactivation) and reaction temperature was found independently of the dopant used. However, dopants significantly affect Ni specific activity (TOF, s−1), acting as either an electronic promoter or inhibiting Ni sintering phenomena. Reaction temperature is a key parameter in determining the evolution of coke. At low reaction temperature (<823 K), carbon whiskers form prevalently on “bare” and Mg, La, and Cl doped samples, whereas only the encapsulating carbon type formed on a K doped system. High hydrogen productivity was obtained on an Mg doped catalyst which, furthermore, proved to be the most stable system.
Doped Ni-based Thin Layer Catalysts (Ni-TLCs) for Catalytic Decomposition of Natural Gas (CDNG) to produce CO free hydrogen were investigated using a new Multilayer Catalytic Reactor (MCR). The influence of K, La, Mg and Cl on activity–stability patterns of a Ni-TLC catalyst was evaluated. The influence of dopant on Ni sintering phenomena and coke formation mechanism was addressed.Figure optionsDownload as PowerPoint slide
Journal: Applied Catalysis A: General - Volume 365, Issue 1, 15 August 2009, Pages 122–129