XRD法研究CrO_3与NaY、NaM分子筛的表面相互作用  

XRD Studies on the Interaction between CrO_3 and NaY,NaM Zeolites

作　　者：祁学永[1] 王娅娟[1] 杨孔章[2] 

机构地区：[1]山东教育学院化学系,济南250013 [2]山东大学胶体与界面化学研究所,济南250100

出　　处：《物理化学学报》1997年第10期938-941,共4页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金

摘　　要：CrO3/NaY and CrO3/NaM zeolite systems have beed studied by X-ray diffraction (XRD). CrO3/NaY(or CrO3/NaM) samples with various amounts of CrO3 were prepared by mixing CrO3 and NaY(or NaM) in dry atmosphere, and by baking at 170 ℃ for 24 hours. The results showed that CrO3 could disperse spontaneously onto NaY, NaM zeolites as a non-crystalline layer during baking. The framework of NaY and NaM zeolites was destroyed by the dispersed CrO3 because of the strong surface interaction. The crystallinity of NaY(or NaM) decreased with the increase of CrO3 loading.CrO3/NaY and CrO3/NaM zeolite systems have beed studied by X-ray diffraction (XRD). CrO3/NaY(or CrO3/NaM) samples with various amounts of CrO3 were prepared by mixing CrO3 and NaY(or NaM) in dry atmosphere, and by baking at 170 ℃ for 24 hours. The results showed that CrO3 could disperse spontaneously onto NaY, NaM zeolites as a non-crystalline layer during baking. The framework of NaY and NaM zeolites was destroyed by the dispersed CrO3 because of the strong surface interaction. The crystallinity of NaY(or NaM) decreased with the increase of CrO3 loading.

关 键 词：三氧化铬 NAY分子筛 NaM分子筛 分子筛 催化剂 

分 类 号：O643.36[理学—物理化学]