固态反应法制备FeHY催化剂及其催化降解活性艳蓝的性能研究

摘要

The catalysts FeNaY-10,FeNH4Y-10 and FeHY-10 with 10%(w) of Fe loading were prepared by solid state reaction process using zeolite NaY,NH4Y and HY as supporter and acetylacetone iron as iron source. The degradation effects of reactive brilliant blue (KN-R) on these catalysts were studied and that on FeHY-10 was the best. FeHY-10 was characterized by XRD and FTIR and the results showed that the crystal structure of FeHY-10 still maintained the unique pore structure of Y zeolite and iron species well dispersed on the surface of Y zeolite. The optimum conditions for catalytic degradation of KN-R were as follows:mass concentration of KN-R solution 300 mg/L,KN-R solution volume 50 mL,solution pH 2,amount of catalyst FeHY-25 (with 25% (w) of Fe loading) 0.281 3 g,H2O2 mass concentration 6.356 g/L,degradation temperature 35 ℃ and degradation time 140 min. Under these conditions, the the degradation rate of KN-R on catalyst FeHY was 97.4%.%分别以NaY、NH4Y和HY沸石为载体,以乙酰丙酮铁为铁源,采用固态反应法制备了铁负载量均为10%(w)的FeNaY-10、FeNH4Y-10和FeHY-10催化剂.考察了各催化剂对活性艳蓝(KN-R)的降解效果,其中FeHY-10的催化降解效果最佳.采用XRD和FTIR技术对FeHY-10催化剂进行表征.表征结果显示,FeHY催化剂晶体结构仍然保持了Y分子筛特有的孔道结构,铁物种在Y 分子筛表面高度分散.催化降解实验表明,催化降解KN-R的最佳工艺条件为KN-R溶液(质量浓度为300 mg/L)加入量为50 mL、溶液pH为2、催化剂FeHY-25(铁负载量为25%(w))加入量为0.2813 g、H2O2质量浓度为6.356 g/L、降解温度为35 ℃、降解时间为140 min,在此工艺条件下FeHY催化剂对KN-R的降解率为97.4%.