Capturing the effects of particle heterogeneity on adsorption in a fixed bed
Capturing the effects of particle heterogeneity on adsorption in a fixed bed
复制标题
捕捉颗粒异质性对固定床吸附的影响
DOI：
10.1002/aic.17618
复制
发表时间：
2022
期刊：
影响因子：
3.7
通讯作者：
Goldfarb, Jillian L.
中科院分区：
文献类型：
--
作者：
Pollard, Zoe A.;Cannon, Andrew;Ryan, Emily M.;Goldfarb, Jillian L.
为了有效地设计新的吸附系统，工业规模的固定床通常缩小到台式实验和/或使用计算流体动力学 (CFD) 进行建模。虽然文献中已经有大量工作探索活性炭固定床上对挥发性有机物的吸附，但本文试图考虑小规模观察到的吸附能力的高度可变性，并改进工业规模反应器设计的小规模实验。本研究将实验结果与 CFD 模拟相结合，通过解析局部堆积密度和流动路径，可以明确地模拟系统异质性及其对吸附的影响。通过表面积分析、工业分析和甲苯吸附（通过质谱测量）测定活性炭的物理性质。小规模系统的变异性并不像人们常说的那样归因于表面积或碳含量，而是归因于局部堆积密度的变化和颗粒尺寸分布的不均匀性。
To efficiently design new adsorption systems, industrial scale fixed beds are often scaled down to bench‐top experiments and/or modeled using computational fluid dynamics (CFD). While there has been considerable work exploring adsorption of volatile organics onto activated carbon fixed beds in the literature, this article attempts to reckon with the high variability of adsorption capacities observed at small scales and improve small‐scale experiments for industrial scale reactor design. This study integrates experimental results with CFD simulations, which can explicitly model system heterogeneities and their influence on adsorption by resolving local packing densities and flow paths. Activated carbon physical properties were determined through surface area analysis, proximate analysis, and toluene adsorption (measured via mass spectroscopy). Variability in the small‐scale systems was not attributed to surface area or carbon content, as is often stated, but instead was due to local packing density variations and the heterogeneity of particle size distributions.