Catalytic Mechanism of NaY Zeolite Supported FeSO4 Catalyst for Selective Catalytic Reduction of NOx
The experimental results suggested that FeSO4-NaY and FeSO4-ZSM-5 prepared by impregnation method performed well in NOx removal.The NOx removal rates of the prepared catalyst were 20-35％ higher than those of pure FeSO4,The effective temperature window was largely expanded with the best performance temperature shifted from 440°C to 340°C.SO2 and H2O in flue gas had no obvious effect on catalyst performance.M6ssbauer spectrometry,XPS and in-situ infrared spectra analysis had been employed to investigate the catalytic mechanism of catalysts.It had been found that FeSO4,Fe(OH)SO4 and Fe2O(SO4) were the major components existing in the prepared catalyst,with their portions related to carrier type and preparing condition.FeSO4 combined tighter with carriers after de-NOx reaction.Fe2O3 and the chemical bond between Fe and Al had been found.Fe(OH)SO4 was better in terms of NOx removal than that of Fe2O(SO4).NH3 absorbed on FeSO4-NaY catalyst generated the spectra of NH/ and NH3,suggesting the Eley-Rideal mechanism.FeSO4-ZSM-5 absorbed both NH3 and NO and the carrier (ZSM-5) itself demonstrated some catalytic effect,indicating a different reaction mechanism.SO2-4 from FeSO4 and hydroxyl from carrier jointly enhanced the adsorption of reaction gas.Fe provided the active sites for the reaction between NH3 and NO.
Flue gas denitrification FeSO4 Molecular sieve Catalytic mechanism
Ren Wen Zhao Bo Zhuo Yuqun Chen Changhe
School of Environment,Tsinghua university,Beijing 100084,China Key laboratory for Thermal Science and Power Engineering of Ministry of Education,Department of Ther
国际会议
The 7th International Symposium on Coal Combustion(第七届国际煤燃烧学术会议)
哈尔滨
英文
357-362
2011-07-19（万方平台首次上网日期，不代表论文的发表时间）