Deactivation of Co-Al2O3/SiO2 Fischer–Trospch Synthesis Catalyst in Industrially Relevant Conditions
- 68 Downloads
The deactivation rate of Co-Al2O3/SiO2 Fischer–Tropsch synthesis catalyst have been experimentally assessed at industrially relevant conditions (T 198–237 °C, P = 60 bar, H2/CO = 1.85, GHSV 2000–7000 h–1). The fresh and spent catalyst was characterized by XRD, XPS, BET, TEM, and SEM–EDX techniques. Decreasing active surface area due to cobalt oxidation by product water and sintering of cobalt crystallites were found to be minor factors for the deactivation. The principal reason of activity loss seems is diffusion limitations arising due to catalyst pores plugging by product wax. The linear dependence between gas flow rate and estimated catalyst lifetime was revealed. High GHSV of fresh synthesis gas and/or high circulation ratio of product gas should be employed to prevent rapid loss of catalyst activity.
KeywordsHeterogeneous catalysis Fischer–Tropsch Deactivation Cobalt Wax
This work was supported by the Ministry of Education and Science of the Russian Federation (state task no. 10.2980.2017/4.6). XPS spectra analysis was supported by the project no 3.6105.2017/8.9.
Compliance with Ethical Standards
Conflict of interest
The authors declare no conflict of interest.
- 6.Freund M (1982) Developments in petroleum science, Vol. 14, In: Freund M, Mózes GY (eds) Elsevier Scientific Publishing Company: AmsterdamGoogle Scholar
- 8.Dobratz BM, Crawford PC (1985) LLNL explosive handbook: properties of chemical explosives and explosive simplants. Livermore, CaliforniaGoogle Scholar
- 17.Kiss G, Kliewer CE, DeMartin GJ, Culross CC, Baumgartner JE (2003) J Catal 217:127Google Scholar
- 18.Overett MJ, Breedt B, du Plessis E, Erasmus W, van de Loosdrecht J (2008) Prepr Pap-Am Chem Soc Div Pet Chem 53:126Google Scholar
- 24.Van Steen E, Claeys M, Dry ME, van de Loosdrecht J, Viljoen EL, Visagie JL (2005) J Phys Chem B 109:3577Google Scholar
- 36.International Centre for Diffraction Data (ICDD), PDF-2 Release 2012 https://www.icdd.com/index.php/pdf-2/