Co-pyrolysisof Lignite And Direct Coal Liquefaction Residue

In the present study, the pyrolysis behaviors of Baori lignite, coal direct liquefaction residuefrom Shenhua plant and their blend samples were investigated by a fixed bed reactor in low andmiddle temperature(ranging from450to900℃). Synergy effects during co-pyrolysis were alsostudied. The results indicated that when the temperature was700℃, the tar yield of DCLR wasthe highest as high as15.52%.and the semicoke type were all above G. liquefaction residuemass ratio of2:8with lignite, in this case, coke type is type B; tar yields (dry basis) up to about8.13%, which can be fit for the traditional pyrolysis process.Based on previous experimentalresults, Molecular sieve, alkali and alkaline metals chloride, transition metals chloride, andmolybdenum sulfide were employed as catalyst for the catalytic co-pyrolysis of DCLR andlignite with the mass ratio of20/80at600℃. The result suggests that the addition of CoCl2could not only largely increase the tar yield, but also improve its quality.