Synthesis and evaluation of carbon nanotubes composite adsorbent for CO2 capture: a comparative study of CO2 adsorption capacity of single-walled and multi-walled carbon nanotubes

摘要: As a preliminary investigation towards obtaining carbon nanotube composite adsorbent for CO2 capture, in this study adsorption performance of three commercial nanotubes (CNTs) one single-walled (SWCNTs), and two (2) different multi-walled (referred to as A-MWCNTs B-MWCNTs) were evaluated compared. The purpose was compare the types CNTs select best serve solid anchor development hydrophobic material capture. N2 physi-sorption conducted determine their surface area, pore volume size. In addition, morphology purity checked with Transmission Electron Microscopy Raman Spectroscopy, respectively. capacity using Thermo-gravimetric analysis (TGA) at 1.1 bar, operating temperature ranged from 25 55 °C feed flow rates, order evaluate effects these variables on capacity. results TGA show that both SWCNTs MWCNTs highest °C. Changing flowrates had no significant effect MWCNTs, but decreasing rate resulted enhancement SWCNTs. Overall, it found displayed (29.97 gCO2/kg adsorbent) when compared (12.09 adsorbent), indicating 150% increase over MWCNTs.