快速凝固Ni-50Al-5Si-2Fe-0.25Ce合金的催化特性研究

The Study on Catalytic Features of Rapidly Solidified Ni-50Al-5Si-2Fe-0.25Ce Alloy

制备了快速凝固Ｎｉ－５０Ａｌ－５Ｓｉ－２Ｆｅ－０．２５Ｃｅ合金，用碱洗抽Ａｌ的方法加以活化，对活化后催化剂的结构特征及其十八腈加氢催化性能进行了研究。结果表明，快凝Ｎｉ－５０Ａｌ－５Ｓｉ－２Ｆｅ－０．２５Ｃｅ前置体合金中含有较多的Ｎｉ２Ａｌ３及ＮｉＡｌ３相；活化后所得到的新型催化剂与常规ＲａｎｅｙＮｉ相比，其孔径尺寸减小，ｆ．ｃ．ｃＮｉ晶粒细化，点阵参数扩大。

Rapidly solidified Ni-50Al-5Si-2Fe-0.25Ce alloy was prepared and activated by leaching Al out.Its structure features and catalytic properties on fatty nitrile hydrogenation were investigated.It was found that the rapidly solidified precursor alloy was rich in Ni 2Al 3 and NiAl 3 phases;Compared to conventionally prepared Raney Ni,the new catalyst has small pore diameter,fine f.c.c. Ni grain,big lattice parameter,and high activities and selectivities on two selective reactions to primary amine as well as secondary amine.