An Experimental and Modeling Study of the Adsorption Equilibrium and Dynamics of Water Vapor on Activated Carbon
An Experimental and Modeling Study of the Adsorption Equilibrium and Dynamics of Water Vapor on Activated Carbon
复制标题
活性炭上水蒸气的吸附平衡和动力学的实验和模拟研究
DOI：
10.1021/acs.iecr.5b03445
复制
发表时间：
2015
影响因子：
4.2
通讯作者：
M. Mazzotti
中科院分区：
文献类型：
--
作者：
Max Hefti;L. Joss;D. Marx;M. Mazzotti
本文采用静态和动态测量的方法，研究了商品活性炭对水蒸气的吸附。为此，使用了两个定制装置，它们能够处理潮湿条件下吸附测量相关的挑战。在第一部分中，表征了活性炭在45℃下吸附和解吸过程中水蒸气在活性炭上的平衡。水蒸气的平衡吸附量表现出明显的滞后回路，需要使用具有滞后的等温线模型来描述数据。第二部分介绍了三种进料速度下吸附和解吸条件的固定床实验。这些动态实验用考虑传质和轴向弥散的线性驱动力模型的非等温详细柱模型来描述。估计了传热传质系数，以描述固定床实验。静态和动态测量结果表明：
In this work, the adsorption of water vapor on a commercial activated carbon is studied by means of static and dynamic measurements. To this end, two customized setups are used, which are able to deal with the challenges associated with adsorption measurements under humid conditions. In the first part, the equilibrium of water vapor on activated carbon during adsorption and desorption at 45 °C is characterized. The equilibrium adsorbed amount of water vapor exhibits a pronounced hysteresis loop, requiring the use of an isotherm model with hysteresis to describe the data. In the second part, fixed-bed experiments for both adsorption and desorption conditions at three feed velocities are presented. These dynamic experiments are described by a nonisothermal detailed column model, which considers the linear driving force model for mass transfer and axial dispersion. Heat and mass transfer coefficients are estimated so as to describe the fixed-bed experiments. The results from the static and dynamic measuremen...