摘要
采用溶胶-凝胶法制备了TiO2-ZrO2复合载体,并用共浸渍法制备负载型MoP/TiO2-ZrO2催化剂,通过原位还原技术对催化剂进行还原处理后,在连续固定床反应器上进行活性评价。结果表明,TiO2和ZrO2物质的量比以及Mo负载量对催化剂活性有较大影响,当n(Ti)∶n(Zr)=4∶1和Mo负载质量分数为20%时,MoP/TiO2-ZrO2催化剂的加氢脱氮效果最好,并且TiO2-ZrO2复合载体比TiO2-A l2O3复合载体的活性提高12.4个百分点。
TiO2-ZrO2 mixed supports were prepared by sol-gel method and used in preparation of MoP/ TiO2-ZrO2 catalysts by co-impregnation. Hydrodenitrogenation（HDN） activity of the catalysts was tested in a fixed bed reactor after in-situ reduction. The results showed that titanium-to-zirconium molar ratio and Mo loadings had remarkable influence on activity of the catalysts. Optimal HDN activity was attained over MoP/TiO2-ZrO2 catalysts under n （Ti）： n （Zr） of 4：1 and Mo loadings of 20% （mass fraction）. HDN rate of the catalysts supported on TiO2-ZrO2 was 12.41% higher than that on TiO2-Al2O3.
出处
《工业催化》
CAS
2008年第12期47-52,共6页
Industrial Catalysis
关键词
催化剂工程
复合载体
加氢脱氮
活性
脱氮率
catalyst engineering
mixed support
hydrodenitrogenation （HDN）
activity
HDN rate
