摘要
通过溶胶-凝胶法制备蜂窝状Mn-Ce/TiO_2催化剂,并探究在烟道气脱硝应用中不同工艺条件对Mn-Ce/TiO_2催化活性的影响.结果表明,催化剂在高体积分数NO、高空速、高氧的条件下,仍然显示出了优越的活性.暂态响应实验表明,NO以气态或少数弱吸附态的形式与强吸附的NH3反应;O2在SCR(选择性催化还原)反应中起着重要的作用,O2促进了Mn-Ce/TiO_2催化剂上表面氧的生成,进一步补充了晶格氧,同时也促进了NO的吸附.
The Mn-Ce/TiO2 monolithic honeycomb catalyst was prepared by sol-gel method. We explored the effect of different process conditions on the catalytic activity of Mn-Ce/ TiO2 catalyst when it was applied in removing of NOx in flue gas. The experimental results indi- cated that the catalytic activities of catalyst were significantly affected by the high volume fraction of NO, space velocity ratio and 02 volume fraction. Transient response experiment showed that the NO react with strong adsorption of NH3 in the form of gas or a few weak adsorption state. Oxygen played an important role in SCR process and promoted the generation of surface chemi- sorptions oxygen. O2 not only promoted the surface oxygen generation on the catalyst, comple- mented lattice oxygen, but also promoted the adsorption of NO.
出处
《煤炭转化》
CAS
CSCD
北大核心
2016年第2期92-96,共5页
Coal Conversion
基金
山西省科技攻关项目(20140313002-2)
煤科学与技术省部共建国家重点实验室培育基地开放课题资助项目(MKX201301)
