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烃类脱氢反应是石油化工中一类重要的有机反应,一般都是吸热可逆的.采用无机膜选择分离出反应体系中的氢,可使平衡移动,从而提高脱氢反应的转化率.无机膜反应器用于这类反应的研究已有一些报导,所用无机膜的孔径多在4～5nm.考虑到孔径在30nm左右时气体透过膜的扩散仍遵从Knudsen机制,故本工作用孔径较大的(～35nm)阳极氧化铝膜构成惰性膜反应器,以环己烷在Pt/Al_2O_3上的脱氢为模型反应,考察了这种惰性膜反应器的性能,为孔径30nm左右的多孔无机膜的应用提供依据.
Hydrocarbon dehydrogenation is an important type of organic reaction in petrochemical industry, which is generally endothermic and reversible. The separation of hydrogen in the reaction system with inorganic membrane can shift the equilibrium and improve the conversion rate of dehydrogenation reaction. Inorganic membrane reactor for the study of this type of reaction has been reported that the inorganic membrane used in the pore size of 4 ~ 5nm. Considering the pore size of about 30nm gas diffusion through the membrane still follow the Knudsen mechanism, so the work with the aperture The large (~ 35nm) anodic aluminum oxide film constitutes an inert membrane reactor. The dehydrogenation of cyclohexane on Pt / Al_2O_3 was modeled as a model reaction. The properties of this inert membrane reactor were investigated. Film applications provide the basis.