| 摘要 |
The amount of donatable hydrogen in a hydrogen donor liquid solvent used in an extraction of coal process may be assessed by diluting a sample of the solvent with an aromatic liquid diluent, carrying out a test extraction of the coal with the diluted solvent under standard conditions, determining the extraction yield and, preferably, comparing the yield with yields of calibration tests. The liquid yield may be determined by a quinoline insolubility test and the gas yield by collecting and analysing evolved gas. The method is reliable and quicker than known methods of characterising solvents, and may be used to control coal extraction processes. |
