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.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1997年第10期938-941,共4页
Acta Physico-Chimica Sinica
基金
国家自然科学基金
关键词
三氧化铬
NAY分子筛
NaM分子筛
分子筛
催化剂
X-ray diffraction method, Chromium trioxide, NaY zeolite, NaM zeolite,Interaction
