Mechano-chemical liquefaction of coal

The effects of mechano-chemical action in the liquefaction of coal are investigated in the present study. The Szego Mill has been adapted as a grinder-reactor to operate at temperatures up to 673K and hydrogen pressures up to 20 MPa. The mill fits a modified 2-liter autoclave. Two Canadian coals, bituminous Devco coal from Nova Scotia and subbituminous Forestburg coal from Alberta, tetralin and hydrogen are used.;Mechano-chemical action enhances the total conversion of Devco coal to tetrahydrofuran solubles over the temperature range of 613K to 653K and pressures of ;Mass transfer control is observed in both grinding and non-grinding liquefaction. Coal conversion appears to be independent of the particle size in agreement with the crackling-core model, fast-crackling case.;Increased production of preasphaltenes, C;Gas evolution upon grinding is likely a kinetically induced phenomenon. It is believed that over ;Experimental first order reaction rate constants, k(s;The corresponding apparent energies of activation, E;Combined heat and mass balances appear to show that mechano-chemical action induces endothermic effects in Devco coal, as H...