摘要
采用静态容积法实验测量了CO_2和CH_4在13X沸石分子筛上的吸附等温曲线,CO_2和CH_4吸附量随吸附温度的降低和压力的增大而增加。利用Langmuir模型、Sips模型和Toth模型对实验测量的吸附平衡数据进行拟合,均取得了较好的拟合结果,并利用非线性拟合得到了模型参数。模拟结果表明,Toth模型对实验结果的拟合程度最好。利用测量数据计算了CO_2与CH_4在所用吸附剂上的等量吸附热,发现吸附过程主要发生的是物理吸附,吸附剂表面是非均一的。
The static volumetic method was adopted to measure the adsorption equilibrium isotherms of CO2 and CH4 on zeolite 13X. It was found that the adsorption capacity of CO2 and CH4 increased with the increase of temperature and increased with the increase of pressure. The Langmuir, Sips and Toth models were used to fit the adsorption equilibrium data measured,respectively. The relative paraments of models were obtained by using the nonlinear fitting. The result showed that the best fitted theoretical model is Toth model, and then Langmuir model and Sips model.The isosteric heats of CO2 and CH4 adsorptionon the three kinds of adsorbents were calculated using experimental data. It was found that the adsorption process was mainly physical adsorption and the adsorbent＇s surface was non-uniform.
出处
《天然气化工—C1化学与化工》
CSCD
北大核心
2017年第2期5-8,27,共5页
Natural Gas Chemical Industry
基金
中央高校基本科研业务费专项资金资助(DUT15ZD109)
中国石油科技创新基金资助(2015D-5006-0601)
大连市科技计划项目(2015A11GX045)
