Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 57, Issue 23, Pages 7802-7810Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.8b01441
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Funding
- National Natural Science Foundation of China [U1662103, 21673290]
- Beijing Natural Science Foundation [2182060]
- HKSAR Innovation and Technology Commission (ITC)
- ITF Project [ITS/422/16]
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Iron titanate catalysts with variable Nb content was synthesized by the homogeneous precipitation method, and they were applied to the NH3-selective catalytic reduction (SCR). The widest performance temperature window is obtained on the 0.05Nb-0.95Fe-Ti-O catalyst between 200 and 400 degrees C with a NO conversion higher than 90% at a gas hourly space velocity (GHSV) of 50 000 h(-1). The addition of Nb improves the acidity of Fe-Ti-O catalyst while decreasing its reducibility. The excellent performance of 0.05Nb-0.95Fe-Ti-O is attributed to its suitable acidity and reducibility. Both Bronsted and Lewis acid sites over 0.05Nb-0.95Fe-Ti-O catalyst are active in the reaction, and the formation of reactive monodentate nitrate species and cis-N2O22- also promote the performances.
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