浸渍型甲醇裂解Cu/Cr基催化剂

汽车尾气占整个大气污染的 42 % 1] .开发洁净的燃料已成为研究热点 .H2 是最干净的燃料 ,但运输和储存困难 .甲醇被认为是一种很有前途的高能燃料 ,因此出于节能和环保双重原因 ,甲醇裂解制 H2 用于汽车燃料电池或裂解成 H2 和 CO混合气直接用作内燃机燃料的研究和应用已引起广泛关注2 ] .目前研究较多的是沉淀型 Cu/Zn基催化剂 ,但由于分散度不高、Cu晶易长大 ,因而活性和稳定性不好3] .本文报道用共浸的方法制备Cu/Cr基催化剂 ,研究了它们的催化性能 ,并对催化剂的失活原因进行了初步探讨 .催化剂制备 :将 Cu( NO3) 2 · 3H2 O(…

Preparation of Cu/Cr Based Catalysts for Methanol Decomposition

The Cu/Cr base catalysts were prepared by impregnation. XRD and TPR technology were applied to characterize the catalysts. The result showed that the Cu/Cr base catalysts performed much better than the conventional Cu/Zn/Al catalysts. The stability of the catalysts was enhanced by promoters such as K, Mg, Ni, Y. But the promoters reduced the initial activity of the catalysts. The promoters except Y improved the selectivity apparently.