Investigation of computational upscaling of adsorption of SO₂ and CO₂ in fixed bed columns

Fixed bed adsorption is an economical method of removing harmful gases, such as SO₂ and CO₂, from industrial flue gas. It is possible to reduce the cost and environmental impact of fixed bed adsorption by repurposing waste materials to be used as adsorbents, such as semi-coke derived from oil shale, a possible alternative to fossil fuels. Fixed bed adsorption systems are difficult and time consuming to characterize experimentally, especially on large scales. Computational fluid dynamics (CFD) can expand researchers understaning of how these systems are affected by material selection and operating conditions. This study uses CFD to characterize fixed bed adsorption of SO₂ and CO₂. The research primarily focuses on SO₂ adsorption on semi-coke, with an extension to CO₂ adsorption on commercial carbon. The CFD modeling was able to describe the amount of the pollutants each material was able to adsorb over time based on a variety of inputs on a larger scale than experimental research. The model was further able to give more detailed comparisons of materials and operating conditions than the experiments, particularly the SO₂ and semi-coke system.