Evaluation of the sensing and adsorption performance of the synthesized emeraldine salt polyaniline for CO2 elimination

One of the paramount challenges confronting global communities is the precise measurement and effective mitigation of carbon dioxide (CO 2 ) emissions, a primary contributor to global warming and its far-reaching impacts. This study focuses on the synthesis and characterization of polyaniline for CO 2 capture applications. Through experimentation conducted within a temperature range of 25-65 and a pressure range of 1-9 bar, the adsorption behavior of these polymers was comprehensively evaluated. Notably, polyaniline exhibited an impressive CO 2 adsorption capacity of 10.153 mmol/g under optimal conditions. Further analysis revealed the cyclic stability of these polymers, with polyaniline displaying a 96% adsorption rate in the fifth cycle. Additionally, thin films of this polymer were synthesized to assess their sensing capabilities, with the thin polyaniline film exhibiting a 51.35% response to pure CO 2 . Polyaniline demonstrated a linear response trend to varying CO 2 concentrations. Moreover, the optimal operating temperatures for the thin film sensors were determined to be 35 . The rapid response and recovery times for this sensor underscore their potential efficacy in real-world CO 2 sensing applications. In summary, the findings highlight the promising performance of polyaniline as a versatile material for CO 2 adsorption and sensing, offering significant implications for the development of sustainable solutions to address the pressing challenges of carbon emissions. • The study examined experimental study on Emeraldine salt polyaniline for CO 2 adsorption and sensing. • Five different ML models were used to predict mass transfer coefficients in both the liquid and gas phases, as well as the fractional effective area for each, and the top-performing models were chosen. • polyaniline exhibited an impressive CO2 adsorption capacity of 5.897 mmol/g under optimal conditions. • Thin films of the polyaniline were synthesized to evaluate their sensing performance and it demonstrated a 29.49% response to pure CO 2 . • In conclusion, polyaniline can be considered a promising material for the detection and capture of carbon dioxide in the near future.