Author(s)

Souhail Bouzgarrou¹, Hadi Jedli², Nadra Stiti³, Nourdine Hamdi⁴, Khalifa Slimi⁵, Mohamed Bagana³

¹Research Unity of Energetic and Environment, National Engineering School of Tunis, Tunis El Manar University, Tunis, Tunisia.
²Department of Energetic, National Engineering School of Monastir, Monastir, Tunisia.
³Materials Research Laboratory Department of Chemical, National Engineering School of Gabès, Gabès, Tunisia.
⁴Department of Material, Higher Institute for Water Science and Technologies of Gabès, Gabès, Tunisia.
⁵Higher Institute for Transport and Logistics of Sousse, Sousse, Tunisia.

In order to select the best adsorbant for CO₂ sequestration, this study deals the interaction between clay, Triassic sandstone and Jurassic evaporate and CO₂. These materials have been used as sorbents. To choose the adequate geological layers for sequestration and with minimum risk of leakage, adsorbent characterizations were investigated using X-ray diffraction, SEM and surface area analysis, structural and textural shapes of these materials have been investigated too. The elution chromatography in gaseous phase has been employed to determine the adsorption isotherms of adsorbed CO₂ for each adsorbent. Then, the treatment of the experimental data allowed us to compare each CO₂/adsorbent couple. The adsorption isotherms were modeled using the Langmir and Freundlich models. A thermodynamic comparison between the different adsorbents will also be provided. Experimental results show that clay and Triassic sandstone have the highest rate of adsorption amount. It has been also found that the Langmuir model is the most appropriate one to describe the phenomenon of CO₂ adsorption on clay. However, for the other adsorbents (i.e. Triassic sandstone and Jurassic evaporates) the two-models are adequate.

Adsorption Selectivity, Geologic Materials, Surface Area Analysis, Elution Chromatography, Langmuir, Freundlich Modelisation

Bouzgarrou, S. , Jedli, H. , Stiti, N. , Hamdi, N. , Slimi, K. and Bagana, M. (2015) Experimental Adsorption and Modelisation of CO₂ on Adsorbents Collected from Elborma Field in South Tunisia. Journal of Surface Engineered Materials and Advanced Technology, 5, 52-63. doi: 10.4236/jsemat.2015.51006.