Study On Coliquefaction Of Shenhua Non-caking Coal And Shengli Lignite With Biomass

In this dissertation, Shengli lignite and Shenhua coal with waste biomass (lignin and corn straw) were selected to investigate their pyrolysis performances firstly. Co-liquefaction performances of coal with biomass were investigated systematically. Then co-liquefaction oils were analysed in different co-liquefaction condition. Research results are summarized as follows:Initial temperature of coal initial pyrolysis reduces owing to co-pyrolysis. Both conversion rate and oil yield of co-liquefaction are increased comparing with coal alone.Biomass can accelerate coal liquefaction with different effect according to its kinds, Lignin has more promotion to lower rank of coal.Corn straw has more promotion to higher rank of coal. Temperature, ratio, hydrogen pressure, co-liquefaction time have different effect on component of oil, specially temperature. Increasing temperature can improve the quality of oil and deprive sulfur,nitrogen, oxygen.Increasing hydrogen pressure can increase component of alkanes in co-liquefaction oil. In this dissertation. Co-liquefaction mechanism and coliquefaction kineics were investigated too. Activation energy of coal in co-liquefaction is lower than coal alone. One of the prime reasons may be that biomass advances to pyrolyze in co-liquefaction and produces free radicals. These free radicals can reduce chemical bond energy of coal.