研究目的
Investigating the promotion effect of TiO2 on the N2 selectivity of CeMnOx catalyst in the selective catalytic reduction of NO by NH3 (NH3-SCR).
研究成果
Loading TiO2 on CeMnOx catalyst weakens its redox ability and enhances NH3 adsorption, leading to higher N2 selectivity in NH3-SCR by inhibiting NO/NH3 oxidation and facilitating Eley?Rideal reaction pathways even at higher temperatures.
研究不足
The study focuses on the effect of TiO2 on N2 selectivity of CeMnOx catalyst, but other factors like SO2 and H2O poisoning effects, and alkali metal poisoning are not deeply explored.
1：Experimental Design and Method Selection:
CeMnOx catalyst was synthesized by the combustion method, and the supported Ti/CeMnOx catalyst was prepared by wetness impregnation.
2：Sample Selection and Data Sources:
Cerium nitrate, manganese nitrate, critic acid, and distilled water were used for CeMnOx synthesis; tetrabutyl titanate and ethanol were used for TiO2 support.
3：List of Experimental Equipment and Materials:
Micrometrics ASAP-2020 analyzer for N2 physisorption, Philips X’pert Pro diffractometer for XRD, PHI 5000 VersaProbe system for XPS, quartz U-tube reactor for H2-TPR, fixed-bed quartz reactor for NH3-TPD, Nicolet Nexus 5700 FTIR spectrometer for DRIFTS.
4：Experimental Procedures and Operational Workflow:
Catalysts were characterized by various techniques, and their NH3-SCR performance was evaluated in a fixed-bed quartz reactor.
5：Data Analysis Methods:
NO conversion and N2 selectivity were calculated using specific equations based on inlet and outlet concentrations of gases.
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