Synthesis of higher alcohols over K-promoted CuFe/SiO2 catalysts

Atte Aho; Habibur Rahman; Olha Yevdokimova; Dmitry Yu Murzin; Evgeny Rebrov

doi:10.1016/j.cattod.2025.115485

Synthesis of higher alcohols over K-promoted CuFe/SiO₂ catalysts

Atte Aho
, Habibur Rahman
, Olha Yevdokimova
, Dmitry Yu Murzin^*
, Evgeny Rebrov

^*Korresponderande författare för detta arbete

Teknisk kemi och reaktionsteknik

Forskningsoutput: Tidskriftsbidrag › Artikel › Vetenskaplig › Peer review

1 Citeringar (Scopus)

11 Nedladdningar (Pure)

Sammanfattning

The influence of potassium promotion on performance of CuFe/SiO₂ catalyst and the method of carrying out the promotion were studied, exploring co-impregnation, post impregnation and plasma promotion. The prepared catalysts were evaluated in the synthesis of higher alcohols in a lab-scale tubular reactor at different temperatures (225–300 °C) at constant 30 bar pressure, gas hourly space velocity 2000 mL h⁻¹ g_cat⁻¹ and a H₂:CO ratio equal to 2. It was found that addition of potassium changes the product distribution giving less alkanes and more alkenes at comparable CO conversions. Moreover, potassium promotion changed the composition of the alcohol mixture generating more higher alcohols. Extraordinary high, 64.6 %, selectivity to the liquid products was obtained with the plasma promoted catalyst at low, 5.6 %, CO conversion. The highest α-value of 0.32, reflecting the alcohol chain growth probability, was obtained with the plasma promoted catalyst at 275 °C.

Originalspråk	Engelska
Artikelnummer	115485
Tidskrift	Catalysis Today
Volym	460
DOI	https://doi.org/10.1016/j.cattod.2025.115485
Status	Publicerad - 1 dec. 2025
MoE-publikationstyp	A1 Tidskriftsartikel-refererad

Finansiering

This work is part of the activities of the Johan Gadolin Process Chemistry Centre at Åbo Akademi University. Funding from Business Finland through the SynJet project is greatly acknowledged. The catalyst samples were processed and analysed using the TEM at the Electron Microscopy Laboratory, Institute of Biomedicine, University of Turku, which received financial support from Biocenter Finland. The authors are grateful to Dr Nima Pourali from the School of Engineering, the University of Warwick for the preparation of plasma-impregnated catalyst. Materials research infrastructure/Department of Physics and Astronomy, University of Turku is gratefully acknowledged for a possibility to use their XPS. Evgeny Rebrov acknowledges support from the ERC Synergy Grant “Surface-Confined fast modulated plasma for process, energy intensification” (SCOPE) from the European Commission with the Grant No. 810182

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10.1016/j.cattod.2025.115485

1-s2.0-S0920586125003037-mainSlutlig publicerad version, 2,64 MBLicens: CC BY

https://urn.fi/URN:NBN:fi-fe2026030517991

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title = "Synthesis of higher alcohols over K-promoted CuFe/SiO2 catalysts",

abstract = "The influence of potassium promotion on performance of CuFe/SiO2 catalyst and the method of carrying out the promotion were studied, exploring co-impregnation, post impregnation and plasma promotion. The prepared catalysts were evaluated in the synthesis of higher alcohols in a lab-scale tubular reactor at different temperatures (225–300 °C) at constant 30 bar pressure, gas hourly space velocity 2000 mL h−1 gcat−1 and a H2:CO ratio equal to 2. It was found that addition of potassium changes the product distribution giving less alkanes and more alkenes at comparable CO conversions. Moreover, potassium promotion changed the composition of the alcohol mixture generating more higher alcohols. Extraordinary high, 64.6 \%, selectivity to the liquid products was obtained with the plasma promoted catalyst at low, 5.6 \%, CO conversion. The highest α-value of 0.32, reflecting the alcohol chain growth probability, was obtained with the plasma promoted catalyst at 275 °C.",

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author = "Atte Aho and Habibur Rahman and Olha Yevdokimova and Murzin, \{Dmitry Yu\} and Evgeny Rebrov",

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AU - Yevdokimova, Olha

AU - Murzin, Dmitry Yu

AU - Rebrov, Evgeny

PY - 2025/12/1

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N2 - The influence of potassium promotion on performance of CuFe/SiO2 catalyst and the method of carrying out the promotion were studied, exploring co-impregnation, post impregnation and plasma promotion. The prepared catalysts were evaluated in the synthesis of higher alcohols in a lab-scale tubular reactor at different temperatures (225–300 °C) at constant 30 bar pressure, gas hourly space velocity 2000 mL h−1 gcat−1 and a H2:CO ratio equal to 2. It was found that addition of potassium changes the product distribution giving less alkanes and more alkenes at comparable CO conversions. Moreover, potassium promotion changed the composition of the alcohol mixture generating more higher alcohols. Extraordinary high, 64.6 %, selectivity to the liquid products was obtained with the plasma promoted catalyst at low, 5.6 %, CO conversion. The highest α-value of 0.32, reflecting the alcohol chain growth probability, was obtained with the plasma promoted catalyst at 275 °C.

AB - The influence of potassium promotion on performance of CuFe/SiO2 catalyst and the method of carrying out the promotion were studied, exploring co-impregnation, post impregnation and plasma promotion. The prepared catalysts were evaluated in the synthesis of higher alcohols in a lab-scale tubular reactor at different temperatures (225–300 °C) at constant 30 bar pressure, gas hourly space velocity 2000 mL h−1 gcat−1 and a H2:CO ratio equal to 2. It was found that addition of potassium changes the product distribution giving less alkanes and more alkenes at comparable CO conversions. Moreover, potassium promotion changed the composition of the alcohol mixture generating more higher alcohols. Extraordinary high, 64.6 %, selectivity to the liquid products was obtained with the plasma promoted catalyst at low, 5.6 %, CO conversion. The highest α-value of 0.32, reflecting the alcohol chain growth probability, was obtained with the plasma promoted catalyst at 275 °C.

KW - CuFe catalyst

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