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研究了四氢呋喃水溶液在间歇搅拌槽内3Ao分子筛上的吸附平衡和动力学,用Langmuir方程拟合了吸附等温线,并用粒内表面扩散模型和Langmuir方程对吸附动力学曲线进行拟合。求取了表面扩散系数Ds,并研究了温度、初始浓度和粒径的变化对Ds的影响。Ds在25℃下C0为6.5%、dp为1.46~1.97mm时为7.83×10?7(cm2?s?1),并随着温度的升高及随着浓度的加大而增加,但不受粒径变化的影响。此外还求取了表面扩散指前因子Dso为1.85×10?5(cm2?s?1)和不同浓度下的活化能E。
The adsorption equilibrium and kinetics of tetrahydrofuran aqueous solution on 3Ao molecular sieve in an intermittent stirred tank were studied. The adsorption isotherms were fitted by Langmuir equation. The adsorption kinetic curves were fitted by the intra-particle surface diffusion model and Langmuir equation. The surface diffusion coefficient Ds was obtained and the effect of temperature, initial concentration and particle size on Ds was also studied. Ds was 6.5% at 25 ° C and 7.83 × 10 -7 (cm2 s -1) at dp of 1.46 to 1.97 mm, and increased with increasing temperature and not increasing with increasing concentration Affected by changes in particle size. In addition, the surface diffusion before the factor Dso 1.85 × 10? 5 (cm2? S? 1) and the activation energy E at different concentrations.