费托法
合成气
氢
催化作用
化学工程
氧化铁
材料科学
直接还原铁
氧化物
金属
一氧化碳
化学
冶金
有机化学
选择性
工程类
作者
Monia Runge Nielsen,Asger Barkholt Moss,Anton Simon Bjørnlund,Xi Liu,Axel Knop‐Gericke,Alexander Yu. Klyushin,Jan‐Dierk Grunwaldt,Thomas L. Sheppard,Dmitry E. Doronkin,Anna Zimina,Thomas Erik Lyck Smitshuysen,Christian Danvad Damsgaard,Jakob Birkedal Wagner,Thomas W. Hansen
标识
DOI:10.1016/j.jechem.2020.03.026
摘要
The activation of iron oxide Fischer–Tropsch Synthesis (FTS) catalysts was investigated during pretreatment: reduction in hydrogen followed by carburization in either CO or syngas mixture, or simultaneously reduction and carburization in syngas. A combination of different complementary in situ techniques was used to gain insight into the behavior of Fe-based FTS catalysts during activation. In situ XRD was used to identify the crystalline structures present during both reduction in hydrogen and carburization. An increase in reduction rate was established when increasing the temperature. A complete reduction was demonstrated in the ETEM and a grain size dependency was proven, i.e. bigger grains need higher temperature in order to reduce. XPS and XAS both indicate the formation of a small amount of carbonaceous species at the surface of the bulk metallic iron during carburization.
科研通智能强力驱动
Strongly Powered by AbleSci AI