铁系无铬(NBC-1)型CO高(中)温变换催化剂──Ⅱ.工业生产中催化剂的谱图研究  

IRON-BASED NON-CHROMIUM (NBC-1) CO HIGH (MEDIUM) TEMPERATURE SHIFT CATALYST──Ⅱ. A STUDY OF THE CATALYST'S SPECTROGRAM IN INDUSTRIAL TESTING

作　　者：刁丽彤[1] 张晓娜[1] 牟占军[1] 金恒芳[1] 

机构地区：[1]内蒙古工业大学化学工程系,呼和浩特010062

出　　处：《内蒙古工业大学学报（自然科学版）》1997年第1期7-16,共10页Journal of Inner Mongolia University of Technology：Natural Science Edition

基　　金：内蒙古自治区自然科学基金

摘　　要：用穆斯堡尔谱、XRD及TEM技术对铁系无铭（NBC－1）型催化剂的前驱态、母体及还原态在不同工艺条件下的生成及晶相结构的激变过程进行了研究。确证了水合四氧化三铁Fe(3-x)O4·nH2O和γ-Fe2O3晶态的形成，及探讨了晶相参数微变引起晶体结构的差异导致催化活性的变化．获得Fe(3-x)O4·nH2O中SB／SA比值为2，x值接近0时，即Fe3O4接近化学计量时催化活性最好．By means of Mossbauer spectrum,XRD and TEM techniques,the forming of pre-matrix-es,matrixes and reductive states of iron-based non-chromium (NBC-1 ) catalyst under dif-ferent technological conditions and the microchange process of the crystal structure are stud-ied. It is proved that Fe(3-x)O4·nH2O and γ-Fe2O3 crystals are formed. The difference of crys-tal structure caused by the microchange of crystal phase parameters is studied which leads to the change of catalyst activity. lt is concluded that the ratio SB/SA for Fe(3-x)O4·nH2O is 2,and, when value x approaches zero (or Fe3O4 approaches chemical measurement),the best catalyst activity will be reached.

关 键 词：无铬催化剂 水煤气 变换反应 铁系催化剂 高温 

分 类 号：TQ113.264[化学工程—无机化工]