Bifunctional MoS 2 /Al 2 O 3 -Zeolite Catalysts in the Hydroprocessing of Methyl Palmitate.

Autor:	Vlasova, Evgeniya, Zhao, Yiheng, Danilova, Irina, Aleksandrov, Pavel, Shamanaev, Ivan, Nuzhdin, Alexey, Suprun, Evgeniy, Pakharukova, Vera, Tsaplin, Dmitriy, Maksimov, Anton, Bukhtiyarova, Galina
Předmět:	CATALYST selectivity ZEOLITE catalysts CATALYSTS CATALYST supports BRONSTED acids FOURIER transform infrared spectroscopy MOLYBDENUM sulfides
Zdroj:	International Journal of Molecular Sciences; Oct2023, Vol. 24 Issue 19, p14863, 21p
Abstrakt:	A series of bifunctional catalysts, MoS2/Al2O3 (70 wt.%), zeolite (30 wt.%) (zeolite—ZSM-5, ZSM-12, and 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.%. Catalysts and supports were characterized by different physical-chemical methods (HRTEM-EDX, SEM-EDX, XRD, N2 physisorption, and FTIR spectroscopy). Hydroprocessing was performed at a temperature of 250–350 °C, hydrogen pressure of 3.0–5.0 MPa, liquid hourly space velocity (LHSV) of 36 h−1, and an H2/feed ratio of 600 Nm3/m3. Complete conversion of oxygen-containing compounds was achieved at 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%). The hydroisomerization activity of the catalysts was in good correlation with the concentration of Brønsted acid sites in the synthesized supports. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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