本工作用X-射线衍射(XRD)、BET表面积/孔结构测试、电子显微镜(EM)、氢化学吸附和程序升温氧化(TPO)结合微型催化反应评价等多种物理化学手段，研究了整体式PtSn/γ-Al₂O₃催化剂和整体式PtSn/ZSM-5催化剂制备化学与丙烷脱氢反应性能。用计算流体力学(CFD)理论方法探讨了整体式催化剂和颗粒状催化剂的丙烷脱氢反应性能差异的主要原因。本文主要研究结果如下： 1.整体式PtSnNa/γ-Al₂O₃催化剂的丙烷脱氢反应催化性能与催化剂组成密切相关。在催化剂的Pt含量为0.5wt%时，随Sn含量增加，催化剂的丙烷转化率和丙烯选择性先增大后减小，适宜的Sn/Pt摩尔比约为6；随Na+含量增加，整体式PtSnNa/γ-Al₂O₃催化剂丙烷转化率和丙烯选择性也是先增大后减小，适宜的Na⁺含量约为0.9wt%。 2.催化剂构造对丙烷脱氢反应性能有明显的影响。整体式PtSnNa/γ-Al₂O₃催化剂和颗粒状PtSnNa/γ-Al₂O₃催化剂的Pt分散度相近，但前者丙烷转化率和丙烯选择性较高，反应稳定性较好。并且，在相同反应条件下，整体式PtSnNa/ZSM-5催化剂整体式PtSnNa/γ-Al₂O₃催化剂的丙烯选择性相近，但整体式PtSnNa/ZSM-5催化剂的丙烷转化率明显高于整体式PtSnNa/γ-Al₂O₃催化剂 3.通过调整整体式催化剂中Pt的分布状态可以优化整体式催化剂的丙烷脱氢催化性能。Pt呈壳层分布的催化剂比Pt呈均匀分布的催化剂具有更优良的丙烷脱氢活性、选择性和稳定性。 4.计算流体力学(CFD)研究结果表明，对于丙烷脱氢反应，整体式催化剂和颗粒状催化剂中压力场、原料和产物的流量场等存在明显差异，这是造成两种催化剂的丙烷脱氢反应性能差异的主要原因。 关键词 丙烷脱氢；铀；整体式催化剂；颗粒状催化剂；计算流体力学

 The preparation and catalytic properties of monolithic PtSnNa/γ-Al₂O₃ and PtSnNa/ZSM-5 catalysts for propane dehydrogenation have been studied by using X-ray diffraction (XRD), BET surface area/pore structure measurements, electron microscope (EM), hydrogen chemisorption and tempreture-programmed oxidation (TPO) combined with micro-reactor tests. Moreover, the different catalytic performance between the monolithic catalysts and the granular catalysts with same composition for propane dehydrogenation have been investigated by using computational fluid dynamics (CFD) theoretic method. The main research results are as follows. 1.The catalytic properties of monolithic PtSnNa/γ-Al₂O₃ catalysts for propane dehydrogenation are closely related to the catalyst composition. When the Pt content in the catalysts is 0.5 wt%, the propane conversion and the propylene selectivity first increase and then decrease with increasing Sn content, and the optimum Sn/Pt molar ratio is ca. 6; Also, the propane conversion and the propylene selectivity first increase and then decrease with increasing Na⁺ content, and the optimum Na⁺ content is ca. 0.9 wt%. 2.The texture of catalyst exerts great influences on the catalytic properties for propane dehydrogenation. The monolithic PtSnNa/γ-Al₂O₃ catalysts have higher propane conversion, higher propylene selectivity and better reaction stability than those of granular catalysts with similar Pt dispersion. Moreover, under the same reaction conditions, the propane conversion over the monolithic PtSnNa/ZSM-5 catalysts are greatly higher than that of monolithic PtSnNa/γ-Al₂O₃ catalysts with the similar propylene selectivity. 3.The catalytic properties of monolithic catalysts for propane dehydronation can be optimized by adjusting Pt dispersion state in the catalyst layer of monolithic catalysts. When Pt is mainly dispersed in outer layers, the monolithic catalysts have higher propane conversion, higher propylene selectivity and better reaction stability than those of monolithic catalysts with Pt dispersed homogeneously in the catalyst layers. 4.The reseach results obtained by computational fluid dynamics (CFD) have shown that for propane dehydrogenation reaction, there are the obvious differences of pressure field, feedstocks and products flow field between the monolithic catalysts and the granular catalysts, which are the main reasons for the obvious different catalytic properties for propane dehydrogenation. Keywords propane dehydrogenation, platinum, monolithic catalysts, granular catalysts, computational fluid dynamics