Formation and Vaporization of Hydrocarbons During Cobalt‐Catalysed Fischer‐Tropsch Synthesis

Abstract

During the initial phase of low‐temperature Fischer‐Tropsch synthesis, the pore system of the catalyst is filled with liquid hydrocarbons. The investigations in a magnetic suspension balance with a cobalt catalyst revealed that the filling period may take several days or even more and strongly depends on the conditions such as temperature and H2‐to‐CO ratio. A numerical model of the pore filling process was developed to gain a better understanding of the parameters that determine this process and of their impact on the filling time. The model is in good agreement with the experimental data.

Microstructured Fischer‐Tropsch Reactor Scale‐up and Opportunities for Decentralized Application

“…Furthermore, an initiation phase was passed, after which natural deactivation was very low. The conversion change during initiation due to catalyst reshaping is known to appear in the course of the first few hundred hours of operation ; liquid hydrocarbons start to fill the catalyst pores and induce diffusion limitation until a stationary conversion level is reached .…”

Design and Technoeconomic Analysis of Fischer–Tropsch Fixed‐Bed Synthesis with Cobalt‐Based Catalysts

“…The equations of the intrinsic rates of CO to CH 4 and to C 2þ -HCs for a Co-based catalyst follow Langmuir-Hinshelwood approaches and the already reported kinetic parameters. [1,[4][5][6][7][8] The rate of CO is the sum of formation of CH 4 and C 2þ -HCs, as CO 2 is not formed on a Co catalyst:…”

“…The intrinsic rates r m,CO,CH 4 and r m,CO,C 2þ were experimentally evaluated for a Pt promoted (0.03 wt% Pt to facilitate Co reduction) 10 wt% Co/γ-Al 2 O 3 catalyst. [1,[4][5][6][7][8] The activity coefficient C a in Equation (3) considers the Co content and thus the intrinsic activity. C a is set to one for 10% Co, and a rise of C a can be realized by a higher Co content.…”

“…Both aspects were experimentally determined in preceding works. [1,[4][5][6][7][8] The reactor model used here to simulate a cooled single tube is a pseudo-homogenous 2D model. Hence, radial temperature gradients in the bed are considered, as they are needed for an accurate calculation of the performance (axial/radial temperature profiles, CO conversion) of a FT reactor.…”

Improving the Selectivity to Liquefied Petroleum Gas by Combining Fischer‐Tropsch Synthesis with Zeolite Cracking

“…Supporting Information for this article can be found under DOI: https://doi.org/10.1002/ceat.202200445. This section includes additional references to primary literature relevant for this research [41][42][43][44].…”