Reduction and carburization of iron oxides for Fischer–Tropsch synthesis  

作　　者：Monia Runge Nielsen Asger Barkholt Moss Anton Simon Bjrnlund Xi Liu Axel Knop-Gericke Alexander YuKlyushin Jan-Dierk Grunwaldt Thomas LSheppard Dmitry EDoronkin Anna Zimina Thomas Eric Lyck Smitshuysen Christian Danvad Damsgaard Jakob Birkedal Wagner Thomas Willum Hansen 

机构地区：[1]DTU Nanolab,Technical University of Denmark,DK-2800,Kgs.Lyngby,Denmark [2]Department of Physics,Technical University of Denmark,DK-2800,Kgs.Lyngby,Denmark [3]SynCat@Beijing,Synfuels China Technology Co.,Ltd,Beijing 101407,China [4]School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [5]Department of Inorganic Chemistry,Fritz Haber Institute of the Max Planck Society,D-14195 Berlin,Germany [6]Research Group Heterogeneous Reactions.Max Planck Institute for Chemical Energy Conversion,D-45470 Mulheim,Germany [7]Research Group Catalysis for Energy,Helmholtz-Zentrum Berlin for Materials and Energy(BESSYⅡ),D-12489 Berlin,Germany [8]Institute for Chemical Technology and Polymer Chemistry,Karlsruhe Institute of Technology,D-76131 Karlsruhe,Germany [9]Institute of Catalysis Research and Technology,Karlsruhe Institute of Technology,D-76344 Eggenstein-Leopoldshafen,Germany

出　　处：《Journal of Energy Chemistry》2020年第12期48-61,共14页能源化学（英文版）

基　　金：supported by the “Villum Center for the Science of Sustainable Fuels and Chemicals” (V-Sustain, grant number 9455) research initiative funded by the VILLUM FONDEN。

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.

关 键 词：In situ characterization Fischer–Tropsch Catalyst reduction and carburization Iron oxides 

分 类 号：O643.36[理学—物理化学]