Study on the CO-SCR anti-sulfur and denitration performance of V-doped OMS-2 catalysts. Issue 23 (1st December 2021)

• Record Type: Journal Article
• Authors: He, Hanbing; Wang, Yusi; Fu, Weiyi; Zhang, Li; Zeng, Jing; Zhu, Guohui
• Is Part Of: Ceramics international. Volume 47:Issue 23(2021)
• Page Start: 33120
• Page End: 33126
• Publication Date: 2021-12-01
• Subjects: OMS-2 -- V doping -- Anti-sulfur -- CO-SCR; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.08.213
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A catalyst with high NO conversion rate and good sulfur resistance is the key to CO-SCR. Herein, the V-doped OMS-2 molecular sieves were successfully synthesized through the hydrothermal method. The resulting catalyst was characterized by X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscope(TEM) and specific surface area analyzer (BET). The results showed that the addition of V increased the average grain size of OMS-2 and the concentration of oxygen vacancies. Meanwhile, V replaced the K site in OMS-2 and participated in the oxidation-reduction reaction together with Mn. Compared with the V0 -OMS-2, the NO conversion rate of V0.2- OMS-2 in a sulfur-free environment increased from 60% to 81% at 150 °C and 75%–94% at 300 °C. The NO conversion rate could still maintain as 80% at 300 °C in a sulfur-containing environment. Graphical abstract: Image 1