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

• DOI: 10.20944/preprints202309.1239.v1
• Publication Date: 2023-09-20T06:02:03Z
• Authors: Evgeniya Vlasova; Yiheng Zhao; Irina Danilova; Pavel Aleksandrov; Ivan Shamanaev; Alexey Nuzhdin; Evgeniy Suprun; Vera Pakharukova; Dmitry Tsaplin; Anton Maximov; Galina Bukhtiyarova
• Keywords: Space velocity; Hydrodeoxygenation; Physisorption

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 methyl palmitate (10 wt.% in dodecane) a trickle-bed reactor. Mo loading was about 7 wt.%. Catalyst supports characterized by different physical-chemical methods (HRTEM-EDX, SEM-EDX, XRD, N2 physisorption, FTIR spectroscopy). Hydroprocessing performed at temperature 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 oxygen-containing compounds achieved 310°C the presence MoS2/Al2O3-zeolite selectivity via ‘direct’ hydrodeoxygenation (HDO) route over 85%. The yield iso-alkanes gradually increases order: MoS2/Al2O3 < MoS2/Al2O3-ZSM-12 MoS2/Al2O3-ZSM-5 MoS2/Al2O3-SAPO-11 MoS2/Al2O3-ZSM-22. sample MoS2/Al2O3-ZSM-22 demonstrated highest (40%). Hydroisomerization activity catalysts good correlation with concentration Brønsted acid sites supports.