3 years ago

Keggin-tungstophosphoric acid decorated Fe2O3 nanoring as a new catalyst for selective catalytic reduction of NOx with ammonia

Keggin-tungstophosphoric acid decorated Fe2O3 nanoring as a new catalyst for selective catalytic reduction of NOx with ammonia
With the aim of developing a new sort of highly effective and eco-friendly catalyst for NOx abatement, 40wt.% 12-tungstophosphoric acid (TPA)-decorated Fe2O3 nanorings were synthesized via a microwave-assisted hydrothermal method followed by simple mechanical-chemistry grinding. Analyses of SEM,TEM and XRD demonstrated the successful synthesis of Fe2O3 nanorings. HRTEM image manifested that 3 layers of TPA polyanions were coated on the external surface of Fe2O3 nanorings. FTIR and NH3-TPD were also employed to characterize the loading of TPA on Fe2O3 and the distribution of acid sites of the composite material. The results indicated the existence of interaction between the terminal oxygen of TPA and Fe3+ of Fe2O3 nanorings. H2-TPR and SCR experiment showed that TPA played a significant promotion role in the SCR reaction of NOx, while Fe2O3 served not only as the active ingredient but also as the support of TPA. TPA/Fe2O3 achieved a satisfactory SCR performance, with the NOx conversion higher than 92% maintained in a wide temperature range between 230 and 500°C. Additionally, the catalyst exhibited an excellent SO2-resistance capacity.

Publisher URL: www.sciencedirect.com/science

DOI: S0920586117304777

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.