随着变压吸附气体分离技术、天然气和氢气储存技术的发展 ,相应的测试理论和技术也在不断发展 ,其中包括等温吸附测试技术。和传统的吸附实验条件相比 ,其压力、温度要高得多 ,多数情况下气体处于超临界状态。处于超临界状态下的气体压力没有上限 ,气体密度随压力的升高而不断 With the development of pressure swing adsorption gas separation technology, natural gas and hydrogen storage technology, corresponding test theories and technologies are also being developed, including isothermal adsorption test technology. Compared with the traditional adsorption experimental conditions, the pressure and temperature are much higher, in most cases the gas is in a supercritical state. There is no upper limit to the gas pressure in the supercritical state, and the gas density keeps increasing with the pressure