期刊
MOLECULAR CATALYSIS
卷 502, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mcat.2021.111392
关键词
K resistance; SCR; Deactivation; Ce; Cu-SSZ-13 catalyst
资金
- Scientific Problem Tackling Program of Science and Technology Commission of Shanghai Municipality [18DZ1202502]
The modification of Cu-SSZ-13 catalysts with Ce enhances resistance to K deactivation and improves SCR performance, mainly due to the synergistic effect between Ce and Cu.
Potassium has a deactivation effect on Cu-SSZ-13 catalyst for selective catalytic reduction of NO with NH3 (NH3SCR). It was demonstrated that the modification of Cu-SSZ-13 catalysts by Ce could improve its K resistance. The characterization of NH3-TPD and H2-TPR suggested that the introduction of Ce on Cu-SSZ-13 could improve its surface acidity and redox ability. Moreover, the content of Cu2+ and chemisorbed oxygen were markedly restored under the situation that Ce and K elements were coexistent on catalyst surface. The synergetic effect between Ce and Cu might be the major reason for the great K resistance and the excellent SCR performance.
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