کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1283280 | 1497637 | 2009 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Yttrium-stabilized zirconia-promoted metallic nickel catalysts for the partial oxidation of methane to hydrogen Yttrium-stabilized zirconia-promoted metallic nickel catalysts for the partial oxidation of methane to hydrogen](/preview/png/1283280.png)
A metallic Ni catalyst has been prepared with nickel sponge and further promoted with YSZ (yttrium-stabilized zirconia) by an impregnation method. The catalysts are characterized by ICP, BET, SEM, XRD and H2-TPR, and then studied for the partial oxidation of methane to hydrogen. The influences of reaction temperature, CH4/O2 ratios and gas hourly space velocity on the reaction rate are investigated. The catalyst characterization results show that the YSZ-promoted metallic Ni catalysts have high specific surface area; there is more NiO phase in the YSZ-promoted catalysts than in the metallic Ni catalyst; a mutual diffusion of Ni2+ and Zr4+ ions might happen between the NiO and YSZ phases. The reaction results show that the YSZ promotion increases the CH4 conversion and the selectivities to H2 and CO.
Journal: International Journal of Hydrogen Energy - Volume 34, Issue 5, March 2009, Pages 2252–2259