Journal
AEROSOL AND AIR QUALITY RESEARCH
Volume 19, Issue 11, Pages 2381-2386Publisher
TAIWAN ASSOC AEROSOL RES-TAAR
DOI: 10.4209/aaqr.2019.04.0184
Keywords
NH3-SCR; Ce-Ti oxide; Hydrochloric acid treatment; Activity
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Funding
- National Natural Science Foundation of China [51506226]
- Natural Science Foundation of Shandong Province [ZR2015EM010]
- Fundamental Research Funds for the Central Universities [19CX02031A]
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The effect of hydrochloric acid treatment on Ce-Ti oxides was investigated for selective catalytic reduction of NO with NH3. The results showed that hydrochloric acid treatment had a positive effect on the low-temperature activity of Ce-Ti oxides. The improved activity of Ce-Ti oxides could be attributed to the increase in the concentration of Ce as well as the amount of Ce3+ and chemisorbed oxygen on the catalyst surface. In addition, the enhanced Lewis acidity could improve NH3 absorption, and was also a key factor to enhance the low-temperature activity of Ce-Ti oxides.
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