Studies on the Co-Liquefaction Technology of Salix Psammophila and Victory Lignite in Sub-Super Critical Ethanol

Abstract

The co-liquefaction of Salix psammophila and Victory lignite was investigated in the sub/supercritical ethanol system. Some factors which could influence the co-liquefaction reaction, such as the Salix psammophila and coal mass ratio, reaction time, reaction temperature and the amount were tested with the single-factor test method. The changes of liquefied product composition and liquefaction residue with the increase of reaction time were analyzed by means of infrared analysis, thermo gravimetric analysis and XRD. The results have shown:①When the quality ratio of salix psammophila and Victory lignite was 50:50 reaction, the temperature was 290 ℃, the reaction time was 90 min, anhydrous ethanol and volume was 60 ml, the highest conversion rate could reach 66.65%, the highest of oil yield was 42.59% and the asphaltene (A + PA) was7.88%.②The Victory lignite would not be fully liquefied under the conditions of the reaction, Salix psammophila played a certain promoting role in the Victory lignite liquefaction process.