In situ observation of phase changes of a silica-supported cobalt catalyst for the Fischer-Tropsch process by the development of a synchrotron-compatible insitu/operando powder X-ray diffraction cell
In situ observation of phase changes of a silica-supported cobalt catalyst for the Fischer-Tropsch process by the development of a synchrotron-compatible insitu/operando powder X-ray diffraction cell
复制标题
DOI：
10.1107/s1600577518013942
复制
发表时间：
2018-11-01
影响因子：
2.5
通讯作者：
Bare, Simon R.
中科院分区：
文献类型：
--
作者：
Hoffman, Adam S.;Singh, Joseph A.;Bare, Simon R.
催化剂的原位表征可以直接了解材料的工作状态。在此，报告了能够分别在高温和高压、1373K 和 35bar 下运行的通用原位同步加速器兼容 X 射线衍射单元的设计和性能特征。通过使用 X 射线衍射表征原型高压催化反应（费托合成）中使用的钴基催化剂，证明了其性能。在 723K 和 20bar 条件下，使用合成气、H-2 和 CO，在费托催化过程中对二氧化硅负载的钴纳米颗粒进行了原位研究。反应后，Co纳米粒子在升高的压力下渗碳，与大气研究相比，表明渗碳速率有所提高。
In situ characterization of catalysts gives direct insight into the working state of the material. Here, the design and performance characteristics of a universal insitu synchrotron-compatible X-ray diffraction cell capable of operation at high temperature and high pressure, 1373K, and 35bar, respectively, are reported. Its performance is demonstrated by characterizing a cobalt-based catalyst used in a prototypical high-pressure catalytic reaction, the Fischer-Tropsch synthesis, using X-ray diffraction. Cobalt nanoparticles supported on silica were studied insitu during Fischer-Tropsch catalysis using syngas, H-2 and CO, at 723K and 20bar. Post reaction, the Co nanoparticles were carburized at elevated pressure, demonstrating an increased rate of carburization compared with atmospheric studies.