A new 3DOM Ce-Fe-Ti material for simultaneously catalytic removal of PM and NOx from diesel engines

Ying Cheng; Jian Liu; Zhen Zhao; Weiyu Song; Yuechang Wei

doi:10.1016/j.jhazmat.2017.08.040

A new 3DOM Ce-Fe-Ti material for simultaneously catalytic removal of PM and NOx from diesel engines

J Hazard Mater. 2018 Jan 15:342:317-325. doi: 10.1016/j.jhazmat.2017.08.040. Epub 2017 Aug 18.

Authors

Ying Cheng¹, Jian Liu², Zhen Zhao¹, Weiyu Song¹, Yuechang Wei¹

Affiliations

¹ State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China.
² State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China. Electronic address: liujian@cup.edu.cn.

PMID: 28846918
DOI: 10.1016/j.jhazmat.2017.08.040

Abstract

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 Ce_0.7Fe_0.2Ti_0.1O₂ catalyst possess a high SCR activity and an excellent selectivity to N₂, giving a maximum concentration of CO₂ at 385°C for PM combustion and 100% NO conversion in the temperature range of 281-425°C. The dual redox cycles (Fe³⁺+Ce³⁺↔Fe²⁺+Ce⁴⁺,Fe³⁺+Ti³⁺↔Fe²⁺+Ti⁴⁺) and the excellent reducibility and sufficient acid sites of catalysts play key roles for the highly catalytic performance.

Keywords: NOx; Simultaneous removal; Soot particulates; Three ordered macroporous strtucture material.