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首页> 外文期刊>Catalysis science & technology >Sulfur-tolerant BaO/ZrO2/TiO2/Al2O3 quaternary mixed oxides for deNO(x) catalysis
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Sulfur-tolerant BaO/ZrO2/TiO2/Al2O3 quaternary mixed oxides for deNO(x) catalysis

机译：Sulfur-tolerant包/氧化锆/二氧化钛/氧化铝第四纪deNO混合氧化物(x)催化

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摘要

Advanced quaternary mixed oxide materials in the form of BaO/Al2O3/ZrO2/TiO2 functionalized with Pt active sites (i.e. Pt/BaO/AZT) were synthesized and structurally characterized via XRD and BET in comparison to a conventional Pt/20BaO/Al benchmark NSR/LNT catalyst. The interactions of these catalysts' surfaces with SOx and NOx gases were monitored via in situ FTIR and TPD. There exists a delicate trade-off between NOx storage capacity (NSC) and sulfur uptake/poisoning which is strongly governed by the BaO loading/dispersion as well as the surface structure and acidity of the support material. Flow reactor measurements performed under realistic catalytic conditions show the high NOx activity for the Pt/20BaO/AZT catalyst at 573 K. After sulfur poisoning and subsequent regeneration at 773 and 973 K, Pt/20BaO/AZT surpassed the NOx catalytic performance at 573 K of all other investigated materials including the conventional Pt/20BaO/Al benchmark catalyst.
机译：先进的四元混合氧化物材料的形式的包/氧化铝/氧化锆/二氧化钛携带Pt活跃网站(例如Pt /包/ AZT)合成和结构特征XRD和BET相比传统Pt / 20包/ Al基准NSR / LNT催化剂。这些催化剂的表面的相互作用袜和氮氧化物气体通过原位红外光谱监控和信息。氮氧化物之间存储容量(NSC)和硫磺吸收/中毒强烈管辖包加载/分散以及表面结构和酸性的支持材料。流动反应器下进行测量现实显示高氮催化条件活动Pt / 20包/ AZT催化剂在573 K。在硫中毒和后续再生在773和973 K, Pt / 20包/ AZT超过了氮氧化合物催化性能在573 K其他所有的材料包括调查传统Pt / 20包/ Al基准催化剂。

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