摘要
氧化铬对γ氧化铁还原行为的影响陈林深吕光烈杨芸黄寅身（杭州大学中心实验室材料结构研究所，杭州３１００２８）关键词还原热重法，铁铬变换催化剂，Ｘ射线衍射分析，氧化铁，氧化铬分类号Ｏ６４３／ＴＱ４４掺铬Ｆｅ２Ｏ３是合成氨工业中重要的变换催化剂．...
XRD and TG reduction analysis show that γ Fe 2O 3 with 0 to 14%Cr 2O 3 prepared by coprecipitate method consists of crystalline γ Fe 2O 3 and non crystalline Fe 2O 3. Their reduction TG curve has three reaction stages in the range of 150～450℃. Non crystalline Fe 2O 3 is reduced to non crystalline Fe 3O 4 at first stage, Crystalline γ Fe 2O 3 to crystalline Fe 3O 4 at second and non crystalline Fe 3O 4 to non crystalline FeO at third stage. About 5%Cr 2O 3 can enter the lattices of γ Fe 2O 3 to form solid solution. With the increase of Cr 2O 3 content, the relative abundance of non crystalline Fe 2O 3 and the amount of soluble Cr 2O 3 in non crystalline increase, while the crystalline size of γ Fe 2O 3 decreases.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
1998年第1期73-76,共4页
基金
浙江省自然科学基金
关键词
变换催化剂
氧化铁
氧化铬
合成氨
氨
Thermogravimetric reduction analysis, Iron oxide, Chromium oxide, Water gas shift catalyst, X ray diffraction analysis
