Single stage catalytic hydrodeoxygenation of pretreated bio-oil

Abstract

Raw bio-oil was pretreated and tested for hydrodeoxygenation (HDO) using three types of the commercial catalysts (HT-36, HT2300, and HT951T) to improve physio-chemical properties and enhance hydrocarbon yields. The three catalysts prompted different levels of hydrodeoxygenation, and the organic phase products (OLPs) yields were 25.30, 27.83, and 13.05 wt%, respectively. Moreover, OLPs had lower water content, total acid numbers (TAN), and O content as well as higher heating value (HHV), C, and H contents. For the three catalysts, HT-36 had the best HDO effects, resulting in 34.8% hydrocarbon production with improved HHV, water content value and TAN as well as element contents. The different level of HDO depended on the catalyst components, structure, and morphology. This research is beneficial for the selection and preparation of effective catalysts for bio-oil upgrading.

Catalytic production of long-chain hydrocarbons suitable for jet-fuel use from fermentation-derived oxygenates

“…This process is widespread in the treatment of biomassderived fuels due to the typical high content of oxygen in their composition which needs to be removed to enhance their properties in terms of heating value and energy density, being commonly applied for bioproducts such as furfural, 52 acetone, 53 fatty acids 54,55 or bio-oil derived compounds. 56 The overall reaction steps for HDO are depicted on Scheme 8, using the doublealkylated 6-undecanone as example.…”