Prospects for the use of synthetic and natural silica aluminas in the composition of Fischer-Tropsch synthesis catalyst

Silica aluminas are of interest as an alternative to zeolites in the composition of catalysts for one-pot Fischer–Tropsch synthesis. The aim of the work is to study the possibility of using synthetic and natural silica aluminas in the composition of a cobalt Fischer-Tropsch synthesis catalyst to increase the content of base oil fraction in the products obtained. The influence of the calcination temperature of silica aluminas on the characteristics of the prepared catalysts and the composition of C₅₊ hydrocarbons formed in their presence was investigated. Aluminosilicate powders were studied using X-ray diffraction, TGA, IR spectroscopy and low-temperature nitrogen sorption methods. Catalysts prepared on the basis of silica aluminas were tested in the Fischer–Tropsch synthesis. The obtained results confirm the possibility of one-reactor synthesis of C₅₊ hydrocarbons enriched with base oil fraction: catalyst based on synthetic amorphous silica alumina makes it possible to obtain a product containing up to 37 wt.% of fraction with a boiling range of 300–490°C. The conditions for the selective production of base oil fraction in the presence of such catalysts were optimized: 2,5 MPа, 210°С, 500 h^-1. It has been shown that it is possible to obtain C₅₊ hydrocarbons containing up to 60 wt.% diesel fraction at 1,5 MPa, especially in the presence of pyrophyllite-based catalysts.

1. Weber J.L., Hernández Mejía C., de Jong K.P., de Jongh P.E. // Catal. Sci. Technol. 2024. V. 14. P. 4799—4842. https://doi.org/10.1039/D4CY00437J

2. Bao J., Yang G., Yoneyama Y., Tsubaki N. // ACS Catal. 2019. V. 9. P. 3026—3053. https://doi.org/10.1021/acscatal.8b03924

3. Синева Л.В., Асалиева Е.Ю., Мордкович В.З. // Успехи химии. 2015. Т. 84. С. 1176—1189. https://doi.org/10.1070/rcr4464

4. Смирнова В.Э. Асалиева Е.Ю., Синева Л.В., Мордкович В.З. // Совр. Мол. Сита. 2023. Т. 5. С. 47—56. https://doi.org/10.53392/27130304_2023_5_1_47

5. Crépeau G., Montouillout V., Vimont A., Mariey L., Cseri T., Maugé F. // J. Phys. Chem. B. 2006. V. 110. № 31. P. 15172—15185. https://doi.org/10.1021/jp062252d

6. Hensen E.J.M., Poduval D.G., Magusin P.C.M.M., Coumans A.E., van Veen J.A.R. // J. Catal. 2010. V. 269. № 1. P. 201—218. https://doi.org/10.1016/j.jcat.2009.11.008

7. Leydier F., Chizallet C., Chaumonnot A., Digne M., Soyer E., Quoineaud A.-A., Costa D., Raybaud P. // J. Catal. 2011. V. 284. № 2. P. 215—229. https://doi.org/10.1016/j.jcat.2011.08.015

8. Wang Z., Chen K., Jiang Y., Trébosc J., Yang W., Amoureux J.-P., Hung I., Gan Z., Baiker A., Lafon O., Huang J. // J. Phys. Chem. Lett. 2021. V. 12. № 47. P. 11563—11572. https://doi.org/10.1021/acs.jpclett.1c02975

9. Salvia W.S., Zhao T.Y., Chatterjee P., Huang W., Perras F.A. // Chem. Commun. 2023. V. 59. № 94. P. 13962—13965. https://doi.org/10.1039/d3cc04237e

10. Zhao N., Chen Y., Li X., Zhang J., Dai L., Jiang X., Liu C., Li Z. // Int. J. Hydrogen Energy. 2022. V. 47. № 35. P. 15706—15720. https://doi.org/10.1016/j.ijhydene.2022.03.054

11. Mazurova K., Glotov A., Kotelev M., Eliseev O., Gushchin P., Rubtsova M., Kazantsev R., Vinokurov V., Stavitskaya A. // Sci. Technol. Adv. Mater. 2022. V. 23. № 1. P. 17—30. https://doi.org/10.1080/14686996.2021.2017754

12. Березняк Е.П., Колодий И.В., Мазилов А.В., Саенко Л.А. // ВАНТ. 2014. Т. 92. № 4. С. 23—30

13. Котова О.Б. // Записки Горного института. 2022. Т. 254. С. 129—135. https://doi.org/10.31897/PMI.2022.43

14. Шаров А.В. // Advances in current natural sciences. 2014. № 7. С. 112—115