Abstract
Four models were investigated to study the feasibility of the hydrogen-free deoxygenation of palmitic acid to hydrocarbons through the stoichiometric thermodynamic equilibrium analysis. The reaction conditions have been varied to estimate the equilibrium reactions composition (temperature (T) of 200 – 600 °C, pressure (P) of 1 – 20 bar, and H2/Palmitic acid ratio of 0 – 10). It was found that the hydrogen-free deoxygenation of palmitic acid was thermodynamically favorable with complete conversion (≈100%) at all investigated reaction conditions. The equilibrium products composition was significantly affected by reaction temperature. The main-formed hydrocarbon was C15H32 at low temperatures and C15H30 at high temperatures. However, the product composition of reaction equilibrium was not affected by the reaction pressure. Even though the internal hydrogen was generated, the hydrodeoxygenation reaction pathways were not too favorable because the hydrodeoxygenation product and its intermediates were negligible.
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