燃烧合成TiCe_(0.2)W_(0.2)O_x催化剂催化还原NO_x性能  

NO_x Removal Performance on Self-Propagating High-Temperature Synthesis Prepared TiCe_(0.2)W_(0.2)O_x Catalyst

作　　者：杨洋[1] 林赫[1] 陈婷[1] 黄震[1] 

机构地区：[1]上海交通大学动力机械与工程教育部重点试验室,上海200240

出　　处：《上海交通大学学报》2014年第6期761-766,771,共7页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金(51176118);上海市启明星跟踪计划(13QH1401600)资助项目

摘　　要：为了扩宽选择性催化还原（SCR）催化剂去除NOx高活性温度窗口,运用燃烧合成法制备了一系列Ti-Ce-W复合金属氧化物催化剂.此外,研究了不同空速对该催化剂性能的影响,并尝试直接用燃烧法将催化剂涂覆于堇青石陶瓷载体表面,涂覆量达到25%.实验结果表明：n（W）∶n（Ti）=0.2（n为物质的量）时其SCR性能最好;TiCe0.2W0.2Ox的NO去除率在200-440℃内达到100%;N2选择性在400℃以内均能达到100%;在空速11 400h-1,温度250-450℃时,NO去除率维持在95%以上,N2选择性为100%.In order to broaden the temperature window of nitrogen oxide removal efficiency of selective catalytic reduction （SCR） catalyst, the research of Ti-Ce-W mixed oxide catalysts was conducted. Among a series of Ti-Ce-W mixed oxide catalysts prepared by SHS （self-propagating high-temperature synthesis） method, catalyst with n（W）： n（Ti）=0.2（n is the amount of substance） showed a 100% NO removal efficiency from 200 to 440 ℃ and 100% N2 selectivity below 400 ℃. The SCR characteristic of TiCe0.2W0.2Ox was also tested under high GHSV（ gas hourly space velocity） of 11 400 h^-1. Besides by directly deposit the catalyst on cordierite carrier, a 95%NO removal efficiency and a 100% N2 selectivity from 250 to 450 ℃ were obtained.

关 键 词：选择性催化还原 氮氧化物 燃烧合成 堇青石载体 柴油机 

分 类 号：TK414.5[动力工程及工程热物理—动力机械及工程]