摘要
基于催化剂在线增活工艺,以火电厂运行条件下的典型钒钛类失活催化剂为原料,采用单因素变量法展开了钒基活化液各成分对失活催化剂增活效果的研究,对活化液增活后的催化剂进行活性评价及SEM、BET、FT-IR和XRD等分析,考察增活前后NO转换率、催化剂表面形貌及结构的变化情况。研究结果表明,在实验条件下,随着4种活性成分含量的增加,催化剂增活后NO转换率均呈现先升高后降低的规律,NO转换率最高达99%,且增活后催化剂表面活性成分增加,Brnsted酸性位增多,比表面积增加,对烟气具有较强适应力。
On the basis of online activation,a study of vanadium based liquids activating V2O5-WO3-Mo O3/TiO2 catalyst was conducted by means of single factor variable design experiments,and vanadium and titanium based inactivated catalysts sampled from coal-fired power plants were used as materials in the study,then the impacts on NO conversion by different activated catalysts were studied and compared with that by inactivated catalyst,and finally,analysis of micro-structure of these catalysts by SEM,BET,FT-IR,XRD was conducted.The above experiments show that,with the increasing of the four activating ingredients,impact on NO conversion by the activated catalysts increases initially and then decreases progressively when that grater than one value,after activated by the liquid,the highest De NOxefficiency can be up to 99%,moreover,active ingredients,Brnsted acidic sites and specific surface area of the activated catalysts increases compared with that of inactivated catalyst and catalyst L2 gains a strong ability to adapt the changes in the composition of the flue gas.
出处
《环境工程学报》
CAS
CSCD
北大核心
2015年第2期847-854,共8页
Chinese Journal of Environmental Engineering
基金
湖南省教育厅科学研究基金重点资助项目(10A004)
南方电网科技项目(K-GD2012-395)
关键词
活化液
催化剂
在线增活
活性成分
NO转换率
activating liquid
catalyst
online activation
activating ingredient
NO conversion
