Abstract
In the last decade, much of the research was focused towards bio refining, mainly due to increased greenhouse gasses arising from the use of the non-renewable resources. Since biomass contains more oxygen than hydrocarbons, catalytic hydrogenation and/or hydro-deoxygenation may be used to remove oxygen from derived bio-oils to improve their stability and enhance their properties. Hydrogen solubility in oxygenated compounds as well as in solvents is crucial in performing reactions, due to its influences on the reaction rates, catalyst activity and selectivity. In the present work hydrogen solubility in two bio-based components, guaiacol and levulinic acid, the latter with an addition of 10 wt% of water, in the temperature range from 322 K up to 422 K and pressures up to 20 MPa was investigated. A high-pressure equilibrium cell using an analytical isothermal method was applied. The solubility data was correlated using the Soave-Redlich-Kwong (SRK), Peng–Robinson–Boston–Mathias (PR–BM) and perturbed chain statistical associating fluid theory (PC–SAFT) equations of state (EOS).
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