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A Thiele Modulus Approach for Nonequilibrium Adsorption Processes and Its Application to CO2 Capture
Industrial & Engineering Chemistry Research ( IF 4.2 ) Pub Date : 2020-02-05 , DOI: 10.1021/acs.iecr.9b05503
Rick T. Driessen 1 , Sascha R.A. Kersten 1 , Derk W.F. Brilman 1
Affiliation  

A Thiele modulus-effectiveness factor method was applied to provide insight into the interplay of intraparticle mass transfer and intrinsic adsorption kinetics in nonequilibrium adsorption processes. A full model and two approximate methods were considered. In the approximate methods only the fluid concentration at the exterior surface and the averaged sorbent loading are required as input. Assuming a uniform sorbent loading, an explicit solution for the effectiveness factor for adsorption as a function of the Thiele modulus for adsorption was derived. For each adsorptive system a minimum and maximum Thiele modulus can be calculated, which provide a priori insights regarding the rate-determining step. The approximations were validated against complete numerical solutions for a single particle and their use was compared to a complete particle description within a full reactor-particle model. Results for CO2 adsorption from flue gas and ambient air showed that the approximations result in a good accuracy for the applications studied.

中文翻译:

用于非平衡吸附方法A蒂勒模法及其在CO应用2捕获

Thiele模量有效因子方法用于提供对非平衡吸附过程中颗粒内传质与固有吸附动力学之间相互作用的了解。考虑了完整模型和两种近似方法。在近似方法中,仅需要输入外表面的流体浓度和平均吸附剂负荷。假设吸附剂负载均匀,则得出了吸附效率因子与Thiele模量的函数的明确解。对于每个吸附系统,可以计算出最小和最大的Thiele模量,从而提供先验的有关速率确定步骤的见解。针对单个粒子的完整数值解验证了近似值,并将它们的使用与完整的反应堆粒子模型中的完整粒子描述进行了比较。烟气和环境空气对CO 2的吸附结果表明,该近似值可为所研究的应用提供良好的精度。
更新日期:2020-02-06
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