精品国产午夜理论片不卡_99这里只有精品_黑人大战亚洲人精品一区_精品国产免费一区二区三区香蕉_99久久精品美女高潮喷水

今天給大家分享的是2014年5月份 《International Journal of Hydrogen Energy》上發(fā)表的一篇名為：Promotional effect of Ru on the activity and stability of Co/SBA-15 catalysts in dry reforming of methane

 文章摘要如下：

The catalysts in this study were prepared via the “two-solvents” impregnation method and labeled as: xCo and yRu-xCo/SBA-15 (x = 12 wt%, y = 0.75–1.125–1.5 wt%). These catalysts were characterized by N2 sorption, X-Ray Diffraction (XRD) techniques, Transmission Electron Microscopy (TEM) analyses and Temperature Programmed Oxidation/Reduction (TPO/TPR). The catalytic activity of mono (Co) and bimetallic (Co–Ru) supported on SBA-15 was investigated in the dry reforming of methane (DRM) reaction.

 TEM and XRD data showed that Ruthenium species were mainly located outside the porosity of the support, while cobalt species were present inside and outside the pores. The addition of ruthenium promoted the reducibility of cobalt catalysts to lower temperatures and a complete reduction of the Ru–Co/SBA-15 catalysts at T < 500 °C was observed. The promotional effect was also shown in the dry reforming reaction where hydrogen started to form on the 0.75Ru–12Co/SBA-15, 1.125Ru–12Co/SBA-15 and 1.5Ru–12Co/SBA-15 at 600, 500 and 510 °C respectively. Nevertheless, the 12Co/SBA-15 displayed low activity for methane dry reforming reaction. Deactivation via coke deposition affects all the catalysts. The TPO of the 1.125Ru–12Co/SBA-15 catalyst shows an oxidation of carbaneous species at T = 250 °C.

 該文章中材料表征采用的是美國麥克儀器AutoChem 2920

詳情可參考下面鏈接：

http://www.sciencedirect.com/science/article/pii/S0360319914006946