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将晶相MoO_3分别同NaY、丝光沸石(NaM)充分研磨混合后,在450℃下焙烧24小时,制成氧化物负载型催化剂,然后进行X射线衍射、激光Raman光谱、IR光谱和比表面测定.实验结果表明MoO_3与分子筛载体之间存在强烈的表面相互作用,致使晶相MoO_3经焙烧进入分子筛孔道,以非晶相表面层的形态存在于NaY、NaM的骨架结构中;并致使NaY晶格结构受到破坏,结晶度和比表面降低,而NaM的结构稳定性较高,晶格结构基本上不受MoO_3分散的影响.X射线衍射相定量法求得MoO_3在1克NaY和NaM上的最大分散量分别是0.54克和0.11克。
The crystal phase MoO_3 was thoroughly ground and mixed with NaY and mordenite (NaM), respectively, and calcined at 450 ° C for 24 hours to prepare an oxide-supported catalyst. X-ray diffraction, laser Raman spectroscopy, IR spectroscopy and specific surface measurement The experimental results show that there is a strong surface interaction between MoO_3 and zeolite carrier, which results in the calcination of MoO_3 into molecular sieve pores and the presence of amorphous phase in the framework of NaY and NaM. The structure is damaged, the crystallinity and the specific surface area are reduced, while the structural stability of NaM is high, and the lattice structure is basically unaffected by the dispersion of MoO_3.The maximum of MoO_3 on 1g NaY and NaM is obtained by X-ray diffraction The dispersions were 0.54 g and 0.11 g, respectively.