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OALib Journal期刊
ISSN: 2333-9721
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一种具有低SO2氧化活性并满足欧V排放标准的柴油车氧化型催化剂
DOI: 10.1016/S1872-2067(12)60545-2, PP. 667-673
Keywords: 储氧材料,钛,锆,复合氧化物,铬改性分子筛,氧化型催化剂
Abstract:
？制备了具有高性能的稀土储氧材料Ce0.75Zr0.25O2-Al2O3,Ti0.9Zr0.1O2复合材料和Cr改性的β分子筛(Cr-β分子筛),并以此制备了单Pt型柴油车尾气净化氧化型催化剂.低温N2吸附-脱附、储氧量测试结果表明,Ce0.75Zr0.25O2-Al2O3样品具有较大的比表面积和优异的储氧性能,Ti0.9Zr0.1O2复合材料也具有优越的织构性能.催化剂对HC和CO具有较高的催化活性,可使SOF在140℃开始转化,且具有较低的SO2氧化活性.在YC4F国Ⅳ柴油机的测试结果表明,经该催化剂处理后的尾气排放能够满足欧Ⅴ排放标准对HC和CO排放要求.
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