Abstract
The rate of coal hydrogenolysis is affeced by(1)the rate of dissolution of hydrogen into liquid phase, and(2)the available collision frequency of hydrogen with coal particles.The authors, with special emphasis on the latter item, studied the influence of heat pre-treatment of paste on the hydrogenolysis, on the size and sinking rate of coal particles in the paste, as well as on the viscosity of paste.Further, they determined solubilities of hydrogen into paste oil and paste, and attained to the following conclusions.Raw paste to be used for hydrogenolysis of coal should be prepared as 1.5-2.3 times of paste oil to coal, which is pre-treated for 2-3 hours at temperatures of about 310-360°C.Thus the paste is superior for hydrogenolytic reaction.The reaction should be done as high temperature and pressure as possible, the paste oil being of comparatively small molecular weight
