Journal
CATALYSIS COMMUNICATIONS
Volume 86, Issue -, Pages 67-71Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2016.08.004
Keywords
CeO2; NH3-SCR catalyst; Sulfation; Regeneration; NOx; SO2
Categories
Funding
- Natural Science Fund of Zhejiang Province, China [LQ14B060006]
- National Natural Science Foundation of China [21276233]
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The effects of regeneration on the activities and structure of CeO2 catalysts for NH3-SCR of NOx have been studied in this article. CeO2 catalyst is deactivated by SO2 for NH3-SCR of NOx in a 200 h long-term operation at 350 degrees C due to the formation of sulfates, and its NOx conversion decreases from 100% to 83% gradually. However, sulfates can be removed from sulfur-poisoned CeO2 catalysts under high temperature thermal treatment in air. After regeneration, NOx conversion of sulfur-poisoned CeO2 catalyst is recovered to about 100% at 350 degrees C. Moreover, the regeneration temperature is related to the nature of the sulfates formed on the sulfur-poisoned CeO2 catalysts. (C) 2016 Elsevier B.V. All rights reserved.
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