掺杂La2O3对CDPF催化性能的影响

Effect of La2O3 doping on the catalytic performance of CDPF

摘要:

本文在CDPF催化剂上,通过掺杂10、20和30 g/L不同浓度的La2O3的助剂制备了不同的CDPF样品,采用XRD、XPS、H2-TPR等表征方法以及活性评价技术,研究掺杂不同浓度La2O3的CDPF载体表面催化剂的理化特性和催化活性的关系。结果表明：随着La2O3的掺杂浓度的增加,样品的结晶度先增加再减小；样品表面的Pt原子浓度先降低再升高；样品对CO的氧化活性呈下降趋势；样品对C3H8的特征温度T10和T50均呈先增加再降低,然后再增加的趋势；样品对NO2产率的T10呈增加趋势。

Abstract:

In this paper, different CDPF samples were prepared on the CDPF catalyst by doping with 10, 20 and 30 g/L of different concentrations of La2O3additives. Using XRD, XPS, H2-TPR and other characterization methods and activity evaluation techniques, the relationship between the physicochemical characteristics and catalytic activity of the CDPF carrier surface catalyst doped with different concentrations of La2O3was studied. The results show that as the La2O3 doping concentration increases, the crystallinity of the sample first increases and then decreases; the Pt atomic concentration on the surface of the sample first decreases and then increases; the oxidation activity of the sample to CO shows a downward trend; The characteristic temperature T10 and T50 of the samples for C3H8 both increased first and then decreased, and then increased again; the T10 of the samples for NO2generation rate showed an increasing tendency.