New Insights in the Activation and Deactivation of Cobalt-Titania Fischer-Tropsch Synthesis Catalysts

PhD defence of José Moya Cancino

The work presented in this PhD thesis focuses on the activation and deactivation processes of a Co/TiO2 Fischer-Tropsch Synthesis (FTS) catalyst by using a range of powerful in-situ or operando spectroscopy and microscopy methods. 
In Chapter 2 the activation and deactivation process of single Co/TiO2 catalyst particles have been studied by using Scanning Transmission X-ray Microscopy (STXM) under relevant reaction conditions. 
In Chapter 3 a novel laboratory-based XANES set-up is described and used that allows to perform, a first of its type, in-situ long-term FTS experiments. 
Chapter 4 presents a comprehensive XAS study on cobalt carbide (Co2C) by using both laboratory-based and synchrotron-based XANES techniques.
In Chapter 5 for the first time in-situ X-ray Raman spectroscopy (XRS) combined to X-ray Diffraction (XRD) has been applied for the FTS reaction under relevant conditions of temperature and pressure. 
And in Chapter 6 is presented the construction and first measurements of an operando high pressure Raman spectroscopy set-up developed and constructed in our laboratory to perform long-term FTS experiments at relevant conditions (e.g. 10 bar and 523 K).

Source: website Utrecht University