Genel, S.2025-05-102025-05-1020242146-538X10.17714/gumusfenbil.15094242-s2.0-105004023738https://doi.org/10.17714/gumusfenbil.1509424Hydrothermal liquefaction (HTL) is the process of liquefying biomass under high pressure and temperature and is widely used to provide environmentally friendly energy and material conversion. In the HTL process, the selection of the right catalysts is critical to increase process efficiency and obtain products with high energy value. For this purpose, in this study, Co/TiO2, Mn/TiO2 and Co+Mn/TiO2 catalysts were synthesized, characterized by analysis methods such as SEM, SEM-EDX, XPS and ICP-OES and used in the HTL process of the Xanthium strumarium plant. The reaction temperature in HTS was determined as 275, 300 and 325 °C and the waiting time was determined as 30 minutes. At the end of the experiments, it was observed that the experiments with catalysts increased the amount of liquid product. Elemental and GC-MS analyzes of the obtained liquid products were performed. The highest energy value was obtained in the presence of the Mn/TiO2 catalyst. © 2024, Gumushane University. All rights reserved.trinfo:eu-repo/semantics/openAccessBioenergyBiomassCatalystHydrothermal LiquefactionTiO2Article