摘要
新型催化材料的研制一直是催化界努力探索的课题。1990年Davis等利用改进的水热法制备了Y型沸石Cu的覆盖物(Y/Cu),并预言这一新型材料有可能在催化、电化学和光化学等领域发挥重要的作用,但到目前为止,有关其应用方面的研究未见报道。 以往制备金属-沸石分子筛材料大多是采用离子交换法、浸渍法等。固-液、汽-液同晶置换法则将金属原子直接引入沸石阴离子骨架,形成杂原子分子筛。
The catalytic material of mordenite coating on metal Cr surface (MOR/Cr) is first synthesized by the vapor-phase method and characterized by IR,SEM snd microprobe techniques.The experimental results show that the crystals of mordenite grow on rnetal Cr surface and Cr does not enter mordenite framework.It seems to be that Cr does not exert any effect on the position of IR absorption bands of mordenite.In HMOR/Cr sample,there exist Si,Al,Cr and a little Na and the Cr atom content is 1.02% as determined by the microprobe method.As a catalyst,HMOR/Cr shows good catalytic properties for the reaction of o-xylene isomerization.
基金
国家自然科学基金
关键词
丝光沸石
金属铬
沸石覆盖物
表征
Mordenite
metal chromium
zeolite coating material
characterization
xylene isomerization
