TY - JOUR ID - TI - A novel four-way combining catalysts for simultaneous removal of exhaust pollutants from diesel engine AU - Jian Liu AU - Jie Xu AU - Zhen Zhao AU - Aijun Duan AU - Guiyuan Jiang and Yanni Jing VL - 22 IS - 7 PB - SP - 1104 EP - 1109 PY - JF - Journal of Environmental Sciences JA - J. Environ. Sci. UR - http://www.jesc.ac.cn/jesc_en/ch/reader/view_abstract.aspx?file_no=2010220721&flag=1 KW - four-way combining catalyst; diesel engine exhaust; double layers; perovskite oxides; zeolite catalysts AB - 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 di use reflectance spectroscopy (UV-Vis DRS). Their catalytic performances were evaluated by temperature-programmed reaction technology. The double layer catalysts could e ectively remove the four main pollutants. The highest catalytic activity was given by the two-layered catalysts of La0:6K0:4CoO3/Al2O3 andW/HZSM-5. Under the simulated exhaust gases conditions, the peak temperature of the soot combustion was 421°C, the maximal conversion of NO to N2 was 74%, the temperature of the HC total conversion was 357°C, and the maximum conversion ratio of CO was 99%. ER -