“…It should be noted that F 0 ( p ), in eq , is the yield of H 2 , and the tar yield, calculated by eq , represents the total yield of oils, asphaltenes, and preasphaltenes with molecular masses from 66 to 1602 The experimental data selected to make the comparison are those in fixed-bed reactors − because abundant data with various coals are obtained using fixed-bed reactors. The residence time, of most reactors with or without carrier gas, is on the second scale; that is, the residence time of a fixed-bed reactor is approximately equal to that in the experiment of V daf in proximate analysis.…”