Effects of reaction conditions on the yields and characteristics of the residue have been studied based on operating results of the 1t/d process supporting unit (PSU). The PSU plant has been operated using Wandoan coal, Illinois No.6 coal and Wyoming coal under the various reaction conditions. It is found that there is a liner relationship between residue yield and yields of each component in the residue, such as asphaltenes, preasphaltenes and insoluble organic matter, in the range of the reaction conditions employed in this study and that the yield of residue from any kind of coals employed mainly depends on the yield of asphaltenes.
These results imply that the asphaltenes are converted into lighter materials with more severe reaction conditions engaged for reducing the residue yield and that in the results from the same coal, the yield of each component comes to the same value in the same redidue yield produced even from the different reaction conditions.
