State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China.
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China.
J Hazard Mater. 2018 Jan 15;342:317-325. doi: 10.1016/j.jhazmat.2017.08.040. Epub 2017 Aug 18.
A new 3DOM material was designed and synthesized for the simultaneous removal of PM (soot particulates) and NOx from diesel engine exhausts. The catalytic purification taking place over the material with double efficacy is cost-efficient. The contact between solid PM and catalyst active site has been process intensified by 3DOM unique structure. 3DOM CeFeTiO catalyst possess a high SCR activity and an excellent selectivity to N, giving a maximum concentration of CO at 385°C for PM combustion and 100% NO conversion in the temperature range of 281-425°C. The dual redox cycles (Fe+Ce↔Fe+Ce,Fe+Ti↔Fe+Ti) and the excellent reducibility and sufficient acid sites of catalysts play key roles for the highly catalytic performance.
一种新型的 3DOM 材料被设计和合成，用于同时去除柴油机废气中的 PM（烟尘颗粒）和 NOx。该材料具有双重功效，其催化净化具有成本效益。3DOM 独特的结构强化了固体 PM 与催化剂活性位之间的接触。3DOM CeFeTiO 催化剂具有很高的 SCR 活性和对 N 的优异选择性，在 PM 燃烧时，最高 CO 浓度出现在 385°C，在 281-425°C 的温度范围内，NO 转化率达到 100%。双氧化还原循环（Fe+Ce↔Fe+Ce、Fe+Ti↔Fe+Ti）以及催化剂的优异还原性和充足的酸性位对其高催化性能起着关键作用。
