3 years ago

Active sites of sulfided NiMo/Al2O3 catalysts for 4,6-dimethyldibenzothiophene hydrodesulfurization-effects of Ni and Mo components, sulfidation, citric acid and phosphate addition

Active sites of sulfided NiMo/Al2O3 catalysts for 4,6-dimethyldibenzothiophene hydrodesulfurization-effects of Ni and Mo components, sulfidation, citric acid and phosphate addition
The active sites of the sulfided 5.2wt%Ni9.8wt%Mo/Al2O3 catalyst for the hydrodesulfurization of 4,6-dimethyldibenzothiophene were studied using a high-pressure flow system. The catalysts were prepared by dry sulfidation or after the calcination of four sets of NiMo precursors with and without citric acid and phosphoric acid. The dry sulfidation using the precursor of nickel carbonate and molybdenum trioxide with citric acid and phosphate produced the HDS MoO3 is considered a precursor for the hydrogenation activity, and ammonium heptamolybdate is a precursor for the direct desulfurization activity. and the highest number of active sites of the Ni2+MoS2 slab (NiMoS phase) based on the NO and XPS. The sulfidation after calcination using nickel nitrate and ammonium hexamolybdate had the highest HDS rate for the desulfurization, and the number of sites of the MoS2 (Mo4+) slab covered with Ni sulfide (Ni2+). This site was stacked with 3.3 layers and 34Å length for the 2% phosphorus catalyst and widely dispersed as multilayers, and increased when stacked by the phosphate addition and contained highly stacked slabs by the citric acid addition.

Publisher URL: www.sciencedirect.com/science

DOI: S0920586117300408

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.