Hydrogenation of ethanol-lignin of larch wood in supercritical ethanol in the presence of sulfated catalysts ZrO2 and Pt/ZrO2
Victor I Sharypov, Natalia G Beregovtsova, Sergei V Baryshnikov, Angelina V Miroshnikova, Oxana P Taran, Alexandr V Lavrenov, Boris N Kuznetsov
Abstract
The process of hydrogenation of larch ethanol-lignin in supercritical ethanol in the presence of sulfated catalysts – ZrO2 and 1 wt.% Pt/ZrO2 was investigated at 250 and 300 °C.
The maximum conversion of ethanol-lignin (99,5 wt.%) and yield of liquid products (87,8 wt.%) were obtained in the presence of bifunctional catalyst Pt/ZrO2 at temperature 300 °C. Catalysts ZrO2 and Pt/ZrO2 decrease of O/C and H/C atomic ratio in liquid products and increase by 2,2 – 2,4 times the yield of carbon oxides and methane increases as a results of intensification of deoxygenation reactions.