The influence of hydrogen pressure on liquefaction is more significant in the presence of catalyst.
当有催化剂存在时氢压对转化率的影响比无催化剂时显著。
2
A new separation and liquefaction of hydrogen at the same time by means of a new cryogenic separation method was presented.
提出采用新的低温分离法将焦炉气中的氢分离并同时液化，及分区液化和分段加压模型。
3
The effect of hydrogen and the mechanism of hydrogen-donor of coal liquefaction in recent years are reviewed. The measures to improve activity of hydrogen are also introduced briefly.