Cu-Ni/ZnO双金属催化剂上顺酐加氢反应的研究

用共沉淀法制备了 Ｃｕ Ｎｉ／ Ｚｎ Ｏ 双金属催化剂， 用 Ｔ Ｐ Ｒ 和 Ｘ Ｒ Ｄ 等方法并结 合顺酐加氢反应对催化剂中组分间的相互作用进行了研究。结果表明， Ｚｎ Ｏ 对 Ｃｕ Ｏ 具有分散作用， 能促进 Ｃｕ Ｏ 的还原； 而与 Ｎｉ Ｏ 有强相互作用， 使后者较难还原， Ｃｕ 与 Ｎｉ 也存在相互作用。催化剂在还原过程中存在诱导期和还原期， 首先 Ｈ２ 缓慢还原出少量 Ｃｕ ， Ｃｕ 又解离吸附 Ｈ２ 为活泼 ［ Ｈ］ ， ［ Ｈ］ 能较快地还原 Ｎｉ Ｏ 和 Ｃｕ Ｏ， 并形成 Ｃｕ３８ Ｎｉ 合金。

Studies on Cu-Ni/ZnO bimetallic catalysts for maleic anhydride hydrogenation

Coprecipitated Cu Ni/ZnO bimetallic catalysts were prepared and studied by TPR,XRD and used in maleic anhydride hydrogenation.TPR results revealed that ZnO dispersed CuO and promoted its reduction,but strongly interacted with NiO to make it difficult to reduce.The interaction existed between Cu and Ni,also.Induction period and reducing period existed in the process of reduction.CuO was reduced to Cu slowly by H 2 in the induction period and the small quantity of Cu could dissociate and adsorb H 2 to activeH],then H] quickly reduced the CuO and NiO to Cu and Ni,which simultaneously formed Cu 3 8 Ni alloy.