Abstract
Repeated cycles experiments of coal liquefaction-distillation-solvent hydrogenation were conducted batchwise using Australian Wandoan coal to determine the product distributions including component identifications in order to establish the basis of the process.
The following results were obtained.
1) The hydrogen consumption was 2.0wt% dry coal basis for the solvent hydrogen-ation stage and 1.9wt% dry coal basis for the liquefaction stage, totalling 3.9wt%.
2) The total oil yield was 37wt% dry coal basis, and main oil product is naphtha (20wt%). The H/C atomic ratio of the naphtha was as high as 1.7 and “fa” value was as low as 0.26 close to petroleum naphtha.
3) There was a tendency that liquid yield at the liquefaction stage increases with the hydrogen consumption at the solvent hydrogenation stage.
4) Main component of the recycle solvents were binuclear aromatics. The H/C atomic ratio of the solvent increased to 1.20.
