不同改性方法对Y型分子筛结构和酸性的影响  

Effects of different modification methods on structure and acidity of Y zeolite

作　　者：韩果[1,2] 孙晓艳[2] 樊宏飞[2] 高闯[1,2] 王继锋[2] 

机构地区：[1]辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001 [2]中国石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《石化技术与应用》2015年第3期208-211,共4页Petrochemical Technology & Application

摘　　要：分别采用氟硅酸铵液相反应法和高温水热硝酸法对Y型分子筛进行了改性,并借助X射线衍射仪、NH3-程序升温吸附法和27Al-核磁共振对改性后Y型分子筛进行了表征。结果表明,改性后分子筛的骨架结构均未遭到破坏;2种改性方法均能有效地脱除铝,并能降低分子筛的酸量,提高分子筛的比表面积、孔容和孔径;后者的改性效果要优于前者。Y zeolite was modified by（ NH4）2Si F6 liquid phase reaction method and hydrothermal and nitric acid treatment respectively,and the modified Y zeolites were characterized by X- ray diffraction,NH3- temperature programmed adsorption method and ^27Al- nuclear magnetic resonance spectroscopy.The results showed that the skeleton structure of the modified molecular sieves was not damaged. Both the two kinds of modification methods could remove aluminium,reduce acidity of molecular sieves,and increase specific surface area,pore volume and pore size. Modification effect of the latter was superior to that of the former.

关 键 词：Y型分子筛 改性 酸性 比表面积 硅铝比 

分 类 号：TE624.95[石油与天然气工程—油气加工工程]