With the increase of steam partial pressure (the gasification pressure increased correspondingly), the total quantity of product gas will increase.

增加水蒸气分压力（气化压力随之增加），气体产物的量增加；

youdao

Only when the water that is limited pressure is heated to the saturate temperature, the partial pressure of steam that is on interface of gas and water shall close to full pressure on water surface.

只要将水定压加热到饱和温度时，气、水界面上蒸汽的分压力就会接近于水面上的全压力。

youdao