负载钌催化剂的低温脱硝活性研究  

STUDY ON DENITRATION ACTIVITY OF SUPPORTED RUTHENIUM CATALYST AT LOW TEMPERATURE

作　　者：周君 张栋顺 林再江 Zhou Jun;Zhang Dongshun;Lin Zaijiang(State Nuclear Electric Power Planning Design&Research Institute Company Limited,Beijing 100095,China)

机构地区：[1]国核电力规划设计研究院有限公司,北京100095

出　　处：《精细石油化工》2024年第2期29-33,共5页Speciality Petrochemicals

摘　　要：采用浸渍法制备了Ru-V_(2)O_(5)-WO_(3)/TiO_(2)催化剂。基于3%V_(2)O_(5)-6%WO_(3)/TiO_(2)催化剂研究了反应条件、钌负载量、SO_(2)和H_(2)O对催化剂活性的影响、催化剂结构表征及硫中毒机理分析。结果表明,催化剂脱硝性能随反应条件的改变而变化;在催化剂中负载钌,可以提升催化剂的低温效率,当钌的负载量为0.01%时,160℃就可以达到92%的效率;负载钌催化剂较未负载钌催化剂表现出更加优秀的抗硫性能,且与钌的负载量呈正相关;通过对抗硫前后的催化剂进行分析表征,催化剂中毒的主要原因是硫酸铵盐的生成并累积,覆盖催化剂的活性位点,堵塞催化剂孔道所致。Ru-V_(2)O_(5)-WO_(3)/TiO_(2) catalyst was prepared by impregnation method.The effect of reaction conditions,ruthenium loading,SO_(2) and H_(2)O on the activity of catalysts were investigated on the basis of a catalyst with a mass fraction of 3%V_(2)O_(5)-6%WO_(3)/TiO_(2).The structure of catalyst was characterized and the mechanism of sulfur poisoning was analyzed.The results show that the denitrification performance of the catalyst varies with the change of reaction conditions.The low temperature efficiency of catalyst can be improved by doping ruthenium in the catalyst.When the load of ruthenium is 0.01%,an efficiency of 92%can be achieved at 160℃.The ruthenium-doped catalyst exhibits superior sulfur resistance compare to the undoped catalyst,and it is positively correlated with loading amount of ruthenium.By analyzing and characterizing the catalysts before and after sulfur resistance,it is believed that the main cause of catalyst poisoning is the generation and accumulation of ammonium sulfate,which covered the active sites of the catalysts and blocked the catalyst pores.

关 键 词：低温 选择性催化还原 抗硫 催化剂 

分 类 号：O643.36[理学—物理化学]