title: A novel four-way combining catalysts for simultaneous removal of exhaust pollutants from diesel engine.
abstract: A novel four-way combining catalysts containing double layers was applied to simultaneously remove four kinds of exhaust pollutants (NOx, CO, HC and PM) emitted from diesel engine. The four-way catalysts were characterized using scanning electron microscope (SEM) and Ultraviolet visible diffuse reflectance spectroscopy (UV-Vis DRS). Their catalytic performances were evaluated by temperature-programmed reaction technology. The double layer catalysts could effectively remove the four main pollutants. The highest catalytic activity was given by the two-layered catalysts of La0.6K0.4CoO3/Al2O3 and W/HZSM-5. Under the simulated exhaust gases conditions, the peak temperature of the soot combustion was 421 degrees C, the maximal conversion of NO to N2 was 74%, the temperature of the HC total conversion was 357 degrees C, and the maximum conversion ratio of CO was 99%.
authors.affiliation: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China. liujian@cup.edu.cn
authors.forename: Jian
authors.initials: J
authors.lastname: Liu
authors.forename: Jie
authors.initials: J
authors.lastname: Xu
authors.forename: Zhen
authors.initials: Z
authors.lastname: Zhao
authors.forename: Aijun
authors.initials: A
authors.lastname: Duan
authors.forename: Guiyuan
authors.initials: G
authors.lastname: Jiang
authors.forename: Yanni
authors.initials: Y
authors.lastname: Jing
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry; D002384:Catalysis; D008855:Microscopy, Electron, Scanning; D010087:Oxides / Q000737:chemistry; D014025:Titanium / Q000737:chemistry; D001335:Vehicle Emissions; D017641:Zeolites / Q000737:chemistry
chemical_list: D000393:Air Pollutants; D017610:Calcium Compounds; D010087:Oxides; D001335:Vehicle Emissions; C059910:perovskite; D017641:Zeolites; D014025:Titanium