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超临界吸附相平衡是超临界吸附/色谱分离过程设计的基础。通常，研究超临界吸附相平衡的实验不仅需要在高压下操作，而且需使用耐高压的检测器。本文提出一种测量超临界条件下吸附相平衡关系的“扩容减压吸收法”方法，它不需要耐高压检测器，以“苯酚－活性炭－超临界二氧化碳流体”为体系，测定了苯酚在活性炭－超临界二氧化碳流体之间的吸附相平衡关系，测定了苯酚在两种活性炭上的超临界吸附等温线，比较了苯酚在超临界条件和常规条件下的吸附等温线，结果表明：在超临界条件下，苯酚在活性炭上的吸附量远小于在常规条件下(如水作为流体)在活性炭上的吸附量。利用这一特性，人们将可开发出使用超临界流体再生活性炭工艺技术。
The supercritical phase equilibrium is the basis for the design of the supercritical fluid sorption / chromatographic separation process. In general, experiments to study the equilibrium of supercritical phase adsorption require not only high pressure operation but also the use of high pressure resistant detectors. In this paper, a method of measuring the equilibrium of adsorption phase under supercritical conditions is proposed, which does not require a pressure-resistant detector. The phenol-activated carbon-supercritical carbon dioxide fluid is used to determine the effect of phenol on activated carbon - supercritical carbon dioxide fluid adsorption phase equilibrium relationship between phenol and phenol in the determination of the two supercritical carbon dioxide adsorption isotherms, phenol over the supercritical conditions and conventional adsorption isotherms, the results show that: in the supercritical Under the conditions, the adsorption capacity of phenol on activated carbon is far less than the amount of adsorption on activated carbon under normal conditions (such as water as a fluid). With this feature, people will be able to develop activated carbon technology using supercritical fluid regeneration technology.