二甲醚蒸汽重整制氢PdZn系催化剂

 采用沉积沉淀法制备了一系列 PdZn/ZrO₂催化剂。将其与二甲醚水解催化剂 ZSM-5/γ A1₂O₃机械混合后用于二甲醚蒸汽重整制氢反应。考察了 Pd 前体、Zn/Pd 摩尔比(n(Zn)/n(Pd))和还原温度对该催化剂催化性能的影响。结果表明，在以 PdCl₂为前体、n(Zn)/n(Pd)=6时制备的并经400℃还原的 PdZn/ZrO₂催化剂与 ZSM-5/γ-A1₂O₃质量比为2的 ZSM-5/γ-A1₂O₃水解催化剂组成的混合催化剂在二甲醚蒸汽重整中具有较高催化活性，二甲醚转化率和 H₂产率分别为56.8%和55.7%， CO₂选择性可达81.1%。

PdZn-Based Catalysts for Steam Reforming of Dimethyl Ether

A series of PdZn/ZrO₂ catalysts were prepared by deposition-precipitation method, which was mechanical mixed with ZSM-5/γ-A1₂O₃ as the catalysts for steam reforming of dimethyl ether (DME). The effects of palladium precursors, Zn/Pd molar ratio and reduction temperature on the catalytic performance of PdZn/ZrO₂ were investigated. The results showed that better performance was obtained when PdCl₂ was used as precursor with Zn/Pd mole ratio of 6 and reduced at 400℃, of which DME conversion of 56.8% with hydrogen yield of 55.7% and CO₂ selectivity of 81.1% were obtained.