H2S solubility enhancement using ethylene diamine functionalized carbon nanotubes and the aqueous solution of N-methyldiethanolamine

Carbon Nanotubes (CNTs) were functionalized using Ethylene Diamine (EDA). To study surface morphology, identify the functional group and crystallography structure, the EDA-functionalized CNT was characterized using FESEM, FT-IR, and XRD, respectively. Synthesized EDA-CNTs were dispersed in 40 wt% MDEA solution and the stability of EDA-CNTs nanoparticles was assessed through zeta potential technique. While the pressure increased up to 8 bar, the solubility of H2S gas was then investigated in the nanofluid composed of 0.1 wt% EDA-CNTs and 40 wt% MDEA solution at 30, 45, and 60 °C. The results revealed that the solubility of the H2S gas could be enhanced to up to 13.65% when the 40 wt% MDEA solution was amended by 0.1 wt% EDA-CNTs nanoparticles.