Journal
CHEMICAL PAPERS
Volume 71, Issue 10, Pages 1921-1928Publisher
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/s11696-017-0186-8
Keywords
Reductions; Catalysts; Acidity; Surface
Categories
Funding
- National Natural Science Foundation of China [20907018, 21177051, U1660109]
- Program for New Century Excellent Talents in University [NECT-13-0667]
- Fundamental Research Funds for the Central Universities [06101047]
Ask authors/readers for more resources
The poisoning effect of calcium on a commercial De-NO (x) SCR catalyst (V2O5-WO3/TiO2) and the regeneration process of deactivated catalysts via water or H2SO4 washing were investigated under simulated condition in laboratory. The physicochemical properties of the catalysts were characterized by SEM-EDX, XRD, BET, TPD and FT-IR measurements, and the deactivation mechanism was discussed. The poisoning of calcium was attributed to the coverage of active sites and the reduction of acid sites on the surface of catalyst. The change of V=O bonds on catalyst surface was an important reason, which plays a significant role in the catalytic cycle of SCR. Due to the suction deliquescence of CaO to Ca(OH)(2), the catalytic activity of deactivated catalyst can be finitely recovered by water washing. Besides, as the result of the re-exposure of active sites by washing CaO off and the promotional effect of surface sulfation, the process of regeneration via sulfuric acid washing has a favorable effect in the experiment.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
