摘要
采用浸渍法制备了一系列Ni改性的Pt/Ce-Zr-O柴油机氧化催化剂(DOC催化剂),考察其催化氧化柴油机模拟尾气时的活性和抗硫性.活性测试结果表明:掺杂Ni以后的催化剂具有较好的低温活性,且以质量分数3%的Ni掺杂量为最佳,其催化氧化丙烯(C3H6)和CO的T50分别降低了约30℃和20℃.抗硫性测试发现,掺杂Ni后可抑制硫酸盐在催化剂表面的聚集,使催化剂的抗硫性能得到提高.
A series of Pt/Ce-Zr catalysts modified by nickel were prepared using impregnation method.The catalytic activity and sulfur resistance of Pt-Ni/Ce-Zr were investigated in presence of simulated diesel exhaust.Results showed that the light-off temperature during the oxidation of C3H6,CO were decreased,and the nickel loading of 3%,of which the light-off temperature for oxidation were reduced 30℃and 20℃respectively,obtained the best catalytic performance.The test of sulfur resistance found that the amount of sulfate over catalyst was decreased by the blockage of nickel,that is why the sulfur resistance of catalyst was enhanced.
出处
《浙江工业大学学报》
CAS
2014年第4期422-425,共4页
Journal of Zhejiang University of Technology
基金
国家自然科学基金资助项目(21107096)
关键词
DOC催化剂
Ni掺杂
低温活性
抗硫性
DOC diesel exhaust
Ni-doped
low-temperature catalytic activity
sulfur resistance
