Direct Carbon Dioxide Capture at Atmospheric Conditions via Adsorption Desorption Hysteresis Using Shape-Dependent Prozzolanic Material
Sherif Fakher, Abdulla Hassanin, Sara Tamer, Mohamed Eltohamy, Bassel Abdelaty, Aseel Al-Sakkaf, Shams Eldakar
Abstract
ABSTRACT One of the main solutions for carbon dioxide (CO2) emissions is carbon capture and storage. Carbon capture technologies, although abundant, are very costly and therefore their application is limited. This research introduces a novel technique for carbon capture that is extremely low in cost and applicable at atmospheric conditions with no pressurization requirements. This method is designed based on the utilization of waste material for sustainability and reduction in environmental impact. The selection of the material was the first step into determining the CO2 storage potential. The material selected was a fly ash produced as a byproduct of clinker manufacturing. The fly ash was then used in three different shapes including powder, cube, and hemi-spherical shape. Following this, the CO2 storage capacity was quantified based on the CO2 adsorption to the material. The shape was one of the most significant findings in this project as changing the shape and size of the fly ash resulted in a significant alteration of the adsorption capacity. The cycles of adsorption and desorption had no significant impact on the fly ash itself which indicated that it does not need to be replaced. This research introduces a small working model for a new design that can assist in carbon capture at ambient conditions. INTRODUCTION The carbon capture, utilization, and storage (CCUS) initiative highlighted to importance of reducing greenhouse gas emissions by capturing the CO2 from different sources, utilizing the captured CO2 in different industries, and the storing the excess CO2 in different forms (Fakher, S. et al., 2020; 2021; 2022). Although CCUS is a widely researched topic, there are still some major challenges associated with this topic especially carbon capture. Although many technologies have been introduced for carbon capture, many of which are in pilot stage, the majority of these methods are extremely costly (Fakher, S., 2020). This is the main limitation that has resulted in the low level of global implementation. It is therefore important to find advancements that can reduce the overall cost of carbon capture in order to globalize the CCUS initiative in the near future.