燃烧合成TiCe0.2W0.2Ox催化剂催化还原NOx性能

摘要/Abstract

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11 400 h-1, 温度250～450℃时，NO去除率维持在95%以上，N2选择性为100%.

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

Abstract:

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 TiC0.2W0.2Ox 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.

Key words: selective catalytic reduction （SCR）, nitrogen oxide, self-propagating hightemperature synthesis (SHS), cordierite carrier； diesel

中图分类号:

TK 414.5

杨洋，林赫，陈婷，黄震. 燃烧合成TiCe0.2W0.2Ox催化剂催化还原NOx性能[J]. 上海交通大学学报（自然版）, 2014, 48(06): 761-766.

YANG Yang,LIN He,CHEN Ting,HUANG Zhen. NOx Removal Performance on Self-Propagating High-Temperature Synthesis Prepared TiCe0.2W0.2Ox Catalyst[J]. Journal of Shanghai Jiaotong University, 2014, 48(06): 761-766.

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