| 摘要 |
<p>A hydrogenation process for brown coal direct liquefaction circulation solvent comprises two reactors, the first of which is mainly filled with protecting catalyst with lower hydrogenation activity and the second of which is primarily filled with main catalyst with higher hydrogenation activity, which forms a catalyst grading suitable for a balanced hydrogenation/dehydrogenation reaction for the solvent. Through the process, all compounds in the hydrogenated solvent can reach even degree of incomplete saturation in molecular structure, which improves transferable hydrogen content of molecules, accordingly the free hydrogen- (-H) released by circulation solvent can meet the need of hydrogen consumption of direct liquefaction of brown coal. The process can simplify the industrial process of direct liquefaction and solvent hydrogenation, reduce the device requirement, and save investment and operating cost.</p> |
