Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Bifunctional MoS2/Al2O3-zeolite catalysts in hydroprocessing of methyl palmitate

Evgeniya Vlasova
* ,
Yiheng Zhao
,
Irina Danilova
,
Pavel Aleksandrov
,
Ivan Shamanaev
ORCID logo ,
Alexey Nuzhdin
ORCID logo ,
Evgeniy Suprun
,
Vera Pakharukova
,
Dmitry Tsaplin
,
Anton Maximov
ORCID logo ,
Galina Bukhtiyarova
ORCID logo
Version 1 : Received: 17 September 2023 / Approved: 18 September 2023 / Online: 19 September 2023 (05:23:48 CEST)

A peer-reviewed article of this Preprint also exists.

Vlasova, E.; Zhao, Y.; Danilova, I.; Aleksandrov, P.; Shamanaev, I.; Nuzhdin, A.; Suprun, E.; Pakharukova, V.; Tsaplin, D.; Maksimov, A.; Bukhtiyarova, G. Bifunctional MoS2/Al2O3-Zeolite Catalysts in the Hydroprocessing of Methyl Palmitate. Int. J. Mol. Sci. 2023, 24, 14863. Vlasova, E.; Zhao, Y.; Danilova, I.; Aleksandrov, P.; Shamanaev, I.; Nuzhdin, A.; Suprun, E.; Pakharukova, V.; Tsaplin, D.; Maksimov, A.; Bukhtiyarova, G. Bifunctional MoS2/Al2O3-Zeolite Catalysts in the Hydroprocessing of Methyl Palmitate. Int. J. Mol. Sci. 2023, 24, 14863.

Abstract

Series of bifunctional catalysts, MoS2/Al2O3(70 wt.%)-zeolite (30 wt.%) (zeolite – ZSM-5, ZSM-12, ZSM-22 and silica aluminophosphate SAPO-11), were synthesized for hydroconversion of methyl palmitate (10 wt.% in dodecane) in a trickle-bed reactor. Mo loading was about 7 wt.%. Catalyst and supports were characterized by different physical-chemical methods (HRTEM-EDX, SEM-EDX, XRD, N2 physisorption, FTIR spectroscopy). Hydroprocessing was performed at temperature of 250-350°C, hydrogen pressure 3.0-5.0 MPa, liquid hourly space velocity (LHSV) 36 h-1, H2/feed ratio – 600 Nm3/m3. Complete conversion of oxygen-containing compounds was achieved at temperature 310°C in the presence of MoS2/Al2O3-zeolite catalysts, the selectivity for the conversion of methyl palmitate via the ‘direct’ hydrodeoxygenation (HDO) route was over 85%. The yield of iso-alkanes gradually increases in order: MoS2/Al2O3 < MoS2/Al2O3-ZSM-12 < MoS2/Al2O3-ZSM-5 < MoS2/Al2O3-SAPO-11 < MoS2/Al2O3-ZSM-22. The sample MoS2/Al2O3-ZSM-22 demonstrated the highest yield of iso-alkanes (40%). Hydroisomerization activity of the catalysts was in a good correlation with concentration of Brønsted acid sites of synthesized supports.

Keywords

bio-jet fuel; MoS2 catalyst; zeolite; Brønsted acid sites; hydrodeoxygenation; hydroisomerization; methyl palmitate

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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