Journal
CATALYSIS COMMUNICATIONS
Volume 39, Issue -, Pages 78-81Publisher
ELSEVIER
DOI: 10.1016/j.catcom.2013.05.010
Keywords
NH3-SCR; Commercial catalyst; Deactivation; Regeneration; Alkali washing
Categories
Funding
- program of Innovation Team of the Bureau of Ningbo Science and Technology, China [201182001]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB0505050]
- National Key Technology R&D Program of the Ministry of Science and Technology, China [2011BAZ01960]
- National Natural Science Foundation [21107106]
- Science Foundation of the Fujian Province [2011J05034]
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The regeneration of SCR catalyst by dilute sodium hydroxide solution was investigated. For the deactivated catalyst, the porosity disappeared and the specific surface area decreased largely, and there were impurities in deposit and variation of V valences. The dilute sodium hydroxide had a positive influence on the surface of catalysts. The porosity partly recovered and the specific surface area increased 12.75-fold, the impurities also decreased, and the amount of V4+ was partly recovered. After regeneration, the relative activity (k/k(0)) at 380 degrees C increased from 0.14 to 0.74. The alkali solution washing might be a promising approach for the regeneration of SCR catalyst. (C) 2013 Elsevier B.V. All rights reserved.
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