Cai Dao-Fei, Huang Wei-Qiu, Wang Dan-Li, Zhang Lin, Yang Guang
Huan Jing Ke Xue. 2013 Dec;34(12):4694-700.
Adsorption technology is widely used in oil vapor recovery, and adsorbents have decisive effect on separation. Three kinds of activated carbon (AC) were chosen to study their adsorption properties and adsorption energy, where n-hexane and n-heptane acted as adsorbate and adsorption experiments were conducted at 293.15 K. At the same time, regression formula of Logistic model was used to fit the throughout curves of active carbons. The results showed that: surface area and pore volume of activated carbon were the main factors affecting its adsorption properties; the adsorption behavior of n-hexane and n-heptane were corresponding to Langmuir adsorption isotherm model; adsorption energy of these three kinds of activated carbon became greater with increasing specific surface area. Fitting curve of Logistic model had high similarity with the experimental results, which could be used in the prediction of breakthrough curves of activated carbons.
吸附技术在油气回收中得到广泛应用，吸附剂对分离起着决定性作用。选择了三种活性炭（AC）来研究它们的吸附性能和吸附能，以正己烷和正庚烷作为吸附质，并在293.15 K下进行吸附实验。同时，使用逻辑模型的回归公式对活性炭的穿透曲线进行拟合。结果表明：活性炭的比表面积和孔容是影响其吸附性能的主要因素；正己烷和正庚烷的吸附行为符合朗缪尔吸附等温线模型；这三种活性炭的吸附能随着比表面积的增加而增大。逻辑模型的拟合曲线与实验结果具有高度相似性，可用于预测活性炭的穿透曲线。
