膜基活性炭吸附轻烃的实验研究

吸附法油气回收技术中，吸附剂的填装方式对吸附分离效果有较大的影响。未成形粉末吸附剂具有较高的比表面积和发达的微孔结构，实验采用微孔滤膜包裹粉末活性炭（膜基活性炭），使粉末活性炭固定在吸附装置中，进行了膜基活性炭对轻烃（正己烷、正庚烷）的吸附实验，测定膜基活性炭和颗粒活性炭对轻烃的吸附性能。实验结果表明，相对于颗粒活性炭，轻烃通过膜基活性炭需要压降增加，但是其在膜基活性炭上的吸附量有明显的提高，也具有可实施性；膜基活性炭静态吸附等温线很好地符合Langmuir模型，且动态穿透曲线实验值与Logistic模型模拟值吻合良好。

Experimental study on adsorption of light hydrocarbons by membrane-based activated carbon

The adsorbent packing method has a significant effect on the research and development of oil vapor recovery technology using adsorption separation approaches. As an unformed powder adsorbent with a high specific surface area and a well-developed microporous structure, microporous-membrane-coated powdered activated carbon (membrane-based active carbon) was fixed in the adsorption device for use in this experiment. This material was then used to conduct light hydrocarbon (n-hexane, n-heptane) adsorption experiments. Specifically, the adsorption performance of the membrane-based activated carbon and granular activated carbon toward the light hydrocarbons was determined. The results show that the pressure drop for the light hydrocarbon achieved using the membrane-based active carbon was higher than that achieved using granular activated carbon. Furthermore, the adsorption capacity of the membrane-based active carbon was markedly high, improving its applicability. The static adsorption isotherm of the membrane-based active carbon was fit by the Langmuir model. The experimental values of the dynamic breakthrough curves were also in good agreement with values simulated using the logistic model.