Kinetics Study of Hydrodeoxygenation (HDO) Reaction of Methyl Laurate

• Main Author: Kevin Suhendra (NIM : 13013069), Mannuel
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/22962
• Institution: Institut Teknologi Bandung

The needs of energy sources are increasing, as the human population grows. Fossil fuel and coal reserves which were people’s main choice are running low. Therefore, renewable source of energy is required, one of which is by using hydrodeoxygenation (HDO) reaction to upgrade the bio oil quality into fuel that is feasible to use. <br /> <br /> This research takes up kinetics of HDO reaction of methyl laurate in n-hexadecane solvent using sufided NiMo/&#947;-Al2O3 catalyst. The data of kinetics are collected from the reaction which is held in a fixed-bed reactor with temperature 280-300oC and weight-hourly space velocity (WHSV) 2.2-4.5 hours-1, 60 bar pressure, alongside H2-to-feed ratio 1000 NmL/mL, and 45/60 mesh catalyst. 0.05%-w dimethyl disulfide (DMDS) is added to liquid reactant in order to retain the activities of the catalyst. Both feed and products are analyzed using gas chromatography – flame ionization detector (GC-FID). <br /> <br /> The kinetics models of HDO will be given in Power Law, according to the experimental data obtained. The kinetics models made are the overall kinetics of HDO methyl laurate and parallel reactions kinetics of HDO and HDCO2/HDCO. Integration method and optimization method are used to define the kinetics parameters. From integration method, the reaction is first-ordered with Arrhenius constant (A) 1,1509 s-1 and activation energy (Ea) 31.03 kJ/mol. Meanwhile, optimization method suggests the reaction order is 0.83 with A 1.64 M0.17.s-1 and Ea 33.483 kJ/mol. Kinetics parameters of parallel reaction HDO abd HDCO2/HDCO which are defined by optimization method are A 0.05 M0.55.s-1, Ea 21.29 kJ/mol, and order of 0.45 for n-dodecane formation; and for n-undecane reaction A 1.53 M-0.08.s-1 and Ea 38.39 kJ/mol, and order of 1.08.