Abstract
The effect of adding Mo and/or Sb to a VTi catalyst on its activity and durability in the selective catalytic reduction (SCR) of nitrogen oxide by NH3 was investigated. The addition of an appropriate amount of Mo–Sb significantly improved the catalyst specific surface area, enhanced the number of Brønsted acid sites, and adjusted the surface species composition. The catalytic activity improved as the Vn+ (n = 4, 3) fraction increased due to the formation of functional groups on the catalyst surface. The redox properties, amount of active labile oxygen, and number of surface oxygen vacancies were improved by the presence of V2MoO8. This species also played an important role in improving the SCR performance and water/sulfur durability of the catalysts due to its sufficient acidity enhancement and reduction of SO2 adsorption. The addition of Mo–Sb likely enhanced catalyst SO2 durability because it reduced SO2 adsorption by inhibiting the reaction between terminal oxygen (V = O) and SO2(g).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
