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负载型MoO_3催化剂是含硫石油加氢脱硫的主要工业催化剂.关于MoO_3/Al_2O_3催化剂上非晶相表面层钼的配位状态和稳定性的研究曾有过报道.我们曾用XRD、激光Raman光谱、IR光谱等方法研究了MoO_3同NaY,NaM(丝光沸石)分子筛的表面相互作用,证明MoO_3能以非晶相状态分散在分子筛的孔道结构中.本文用紫外反射光谱、氨溶和TPR技术研究了NaY,NaM分子筛上分散的非晶相钼(Ⅵ)的配位状态和稳定性.
Supported MoO_3 catalysts are the main industrial catalysts for hydrodesulphurization of sulfur-containing petroleum.Research on coordination state and stability of molybdenum on the surface of amorphous phase in MoO_3 / Al_2O_3 catalysts has been reported.We used XRD, laser Raman spectroscopy , IR spectroscopy to study the surface interaction of MoO_3 with NaY and NaM (Mordenite) zeolites, and to prove that MoO_3 can be dispersed in the pore structure of molecular sieve in amorphous phase.In this paper, UV reflection spectroscopy, ammonolysis and TPR The coordination state and stability of amorphous phase molybdenum (Ⅵ) dispersed on NaY and NaM zeolites were investigated.