浸渍型Cu/Cr基甲醇裂解催化剂的研究(英文)

制备了Ｃｕ／Ｃｒ为基础的浸渍型甲醇裂解催化剂并考察它们的催化性能，研究了Ｋ、Ｍｇ、Ｎｉ、Ｙ等助剂对催化剂性能和结构的影响。利用ＸＲＤ、ＴＰＲ等技术对浸渍型甲醇裂解Ｃｕ／Ｃｒ基催化剂的结构与性能进行了研究．结果表明，虽然Ｃｕ含量明显低于沉淀型Ｃｕ／Ｚｎ／Ａｌ催化剂，Ｃｕ／Ｃｒ基浸渍型催化剂具有更好的活性和稳定性。助剂Ｋ、Ｍｇ、Ｎｉ、Ｙ等能明显提高催化剂的稳定性，但使催化剂的初活性不同程度地降低。Ｋ、Ｍｇ和Ｎｉ能较好地提高催化剂的选择性，而稀土Ｙ对选择性影一不大。

PREPARATION OF Cu/Cr-BASED CATALYSTS FOR METHANOL DECOMPOSITION

The Cu/Cr-based catalysts were prepared by impregnation method. XRD and TPR techniques were applied to characterize the catalysts. The results showed that the Cu/Cr-based catalysts performed much better than the conventional Cu/Zn/Al catalysts, and the stability of the Cu-Cr catalyst was enhanced by promoters such as K, Mg, Ni and Y. The promoters, except Y, can improve the selectivity apparently. However, the promoters would reduce the initial activity of the Cu-Cr catalyst.