Abstract
To solve some problems of conventional experimental analyses of coal liquefaction, other workers have proposed a method utilizing an autoclave equipped with sampling cells with which reacting coal pastes can be sampled as such. They have not showed how to apply the method accurately, however, nor its effectiveness in comparison with conventional analyses. In this work an accurate procedure for applying the method was developed and efficiency was demonstrated. Some of the experimental findings by application of the procedure developed were as follows: (1) the real product distribution under liquefaction conditions was obtainable, while the conventional analyses gave only an apparent product distribution under ambient conditions; (2) the coal slurry holdup was reduced because of considerable conversion of the slurry into gaseous products with the progress of liquefaction.
