摘要
本文对Ｃｕ／Ｃｏ比不同的五个Ｃｕ－Ｃｏ－Ａｌ合金样及其碱抽提产物──ＲａｎｅｙＣｕ－Ｃｏ催化剂的体相结构进行了ＸＲＤ表征。结果表明：Ｃｕ－Ｃｏ－Ａｌ合金由ＣｕＡｌ、ＣｕＡｌ＿２及Ａｌ＿（１３）Ｃｏ＿４三种物相构成。随Ｃｕ／Ｃｏ原子比（０．１７～２３．１）增高，Ａｌ＿（１３）Ｃｏ＿４及ＣｕＡｌ物相逐渐减少，直至消失，ＣｕＡｌ＿２物相产生且逐渐增多。ＲａｎｅｙＣｕ－Ｃｏ催化剂由两种Ｃｕ－Ｃｏ固溶体组成，一种富铜，另一种富钴。Ｃｕ－Ｃｏ固溶体的形成发生于碱抽提或还原过程，含钴物相的存在有利于ＣｕＡ１物相的碱抽提。
Five Cu-Co-Al alloy samples with different Cu/Co ratios and their alkalileached products──Raney Cu-Co catalysts have been prepared and characterized byXRD. The Cu-Co-Al samples studied are composed of three phases : CuAl , CuAl_2,andAl_(13)Co_4. With increasing Cu/Co(atomic ratio from 0.17 to 23.1) , the quantities of Al_(13)Co_4and CuAl phases decrease gradually and finally to zero, and CuAl_2 phase forms and itsquantity increases gradually. Each of the Raney Cu-Co catalysts prepared is composed oftwo types of Cu-Co solid solution. One is rich in Cu, and the other is in Co. But, both ofthem are formed during the alkali leaching or reducing process. The presence of somephases,including Co, favors the alkali leaching of CuAl phase.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1994年第4期349-354,共6页
Journal of Fuel Chemistry and Technology
基金
国家重大自然科学基金
国家煤转化实验室资助
