20.500.12556/DKUM-84743 Liquefaction, cracking and hydrogenation of microalgae biomass resources to ▫$CO_2$▫ negative advanced biofuels mechanisms, reaction microkinetics and modelling Deoxygenation of triglycerides is one of the crucial pathways for the production of oxygen-free hydrocarbons and biofuels that are fully compatible with conventional internal combustion engines. The one-step liquefaction and hydrotreatment of Chlorella sorokiniana microalgae was investigated in a three-phase slurry reactor. The production of diesel-like hydrocarbons was successfully accomplished over sulfide form of NiMo/Al2O3 catalyst under hydrogen atmosphere. The present work contains a comprehensive investigation of the temperature and hydrogen pressure influence on the final product composition. The highest yield of C18 and C16 (26.1% and 10.7%, respectively) was reached by increasing the reaction temperature to 350 °C and hydrogen pressure to 50 bar, while at milder conditions (200 °C and 20 bar) the products appeared only in trace concentrations. In order to obtain an accurate kinetic model, reaction mechanism was first needed to be determined based on experimentally obtained products and intermediates. A simplified reaction pathway contains liquefaction, hydrogenolysis, hydrodeoxygenation, decarboxylation and decarbonylation. The model comprises mass transfer phenomena involved in the liquefaction process, the mass transfer of hydrogen from gas to liquid phase, adsorption, desorption and surface reaction kinetics. The lowest rate constant was calculated for the microalgae conversion to triglycerides (k0 = 1.93 × 10−6 min−1), indicating slow liquefaction. Microalgae Biofuel Liquefaction Hydrodeoxygenation One-pot reaction kataliza katalizatorji biokemija biodizel mikroalge true false true Angleški jezik Slovenski jezik Neznano 2023-07-17 14:29:12 2023-07-17 14:29:12 2023-07-18 03:08:13 0000-00-00 00:00:00 2023 0 0 382-393 Vol. 203 Feb. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2023-02-01 544.3/.4 137056515 10.1016/j.renene.2022.12.055 1879-0682 RAZ_Marinic_Dana_2023.pdf RAZ_Marinic_Dana_2023.pdf 1 95D4FE034C1053354D1D9150C3F32895 9afe6c1cb53a909b9b8f3e99e9b2e299443c7f57c4292e55857bf7bbcec94cbc 422f77de-249e-11ee-8abb-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=168825 https://www.sciencedirect.com/science/article/pii/S0960148122018407 1 8bf57fe9-249d-11ee-8abb-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=168823 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0