5 years ago

Promotional effect of samarium on the activity and stability of Ni-SBA-15 catalysts in dry reforming of methane

Promotional effect of samarium on the activity and stability of Ni-SBA-15 catalysts in dry reforming of methane
Samarium-promoted of 10 wt% Ni-SBA-15 catalysts, were prepared with various loadings of samarium (0.5, 1.5, 3 wt %), by two-solvent impregnation, which was known as a desired metal dispersion method for dry reforming of methane. The catalysts with/without promoter, were characterized by N2 adsorption-desorption, x-ray diffraction (low and high angles of XRD), x-ray fluorescence (XRF), high resolution transmission electron microscopy (HRTEM), field-emission scanning electron microscopy (FESEM), energy dispersive x-ray spectrometry (EDS), wavelength dispersive x-ray spectrometry (WDS), temperature programmed oxidation/reduction (TPO/TPR) techniques, and tested in dry reforming of methane (DRM). XRD and BET results indicated that by adding more than 0.5%wt of samarium, decreased the catalysts' surface area and particles size; and improved the activity and long term stability. Among these promoted catalysts, 3Sm-10Ni-SBA-15 showed the highest catalytic activity and stability. TEM and TPR analysis of 3Sm-10Ni-SBA-15 sample, revealed that addition of samarium enhanced the interaction of NiO particles with support, and promoted dispersion of NiO species. The TPO analysis revealed that the addition of 3 wt% samarium increased the amount of deposited coke, as well. Furthermore, FESEM and HRTEM images confirmed the formation of nanotubes carbon on the surface of spent catalysts.

Publisher URL: www.sciencedirect.com/science

DOI: S1387181117303530

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.