University of Alberta , Department of Civil and Environmental Engineering, Edmonton, AB T6G 2W2, Canada.
Environ Sci Technol. 2013 Oct 15;47(20):11700-10. doi: 10.1021/es402369u. Epub 2013 Oct 2.
A two-dimensional heterogeneous computational fluid dynamics model was developed and validated to study the mass, heat, and momentum transport in a fixed-bed cylindrical adsorber during the adsorption of volatile organic compounds (VOCs) from a gas stream onto a fixed bed of beaded activated carbon (BAC). Experimental validation tests revealed that the model predicted the breakthrough curves for the studied VOCs (acetone, benzene, toluene, and 1,2,4-trimethylbenzene) as well as the pressure drop and temperature during benzene adsorption with a mean relative absolute error of 2.6, 11.8, and 0.8%, respectively. Effects of varying adsorption process variables such as carrier gas temperature, superficial velocity, VOC loading, particle size, and channelling were investigated. The results obtained from this study are encouraging because they show that the model was able to accurately simulate the transport processes in an adsorber and can potentially be used for enhancing absorber design and operation.
开发并验证了一个二维非均相计算流体动力学模型，以研究在气流中挥发性有机化合物（VOCs）被珠状活性炭（BAC）固定床吸附时，固定床圆柱形吸附器中的质量、热量和动量传递。实验验证测试表明，该模型预测了研究 VOCs（丙酮、苯、甲苯和 1,2,4-三甲基苯）的穿透曲线，以及苯吸附过程中的压降和温度，平均相对绝对误差分别为 2.6%、11.8%和 0.8%。研究了载体气体温度、表观速度、VOC 负荷、粒径和沟流等不同吸附过程变量的影响。这项研究的结果令人鼓舞，因为它们表明该模型能够准确模拟吸附器中的传输过程，并有可能用于增强吸收器的设计和操作。
