CO2 Adsorption by Nitrogen-Doped Carbons Prepared from Biomass Soybean

Somayyeh Honarmand and Amirhossein Ghorbani*

Department of Chemical Engineering, Tarbiat Modares University, Tehran, Iran

*To whom correspondence to be addressed: E-mail: [email protected]


Nitrogen-doped activated carbon was synthesized by protein source from biomass soybean. Soybean is a significant and cheap source of protein which is nitrogen base compound. This work is intended to new carbonaceous adsorbents with nitrogen content in the carbon framework that applying CO2 capture. The activated carbon was characterized using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy and Fourier-transform infrared spectroscopy. Characterization results show nitrogen and oxygen functional group in activated carbon. This adsorbent has sufficient porosity whit high content of nitrogen (12 % wt.) makes it one of suggestion for COcapture. The experimental value of adsorption modeled by Langmuir adsorption isotherm and good agreement capacity. The synthesized activated carbon demonstrates high CO2 capture with 3.21 mmol/g at 25 ºC and 2 mmol/g at 50 ºC. The results showed that nitrogen doped of carbons can be used as potential adsorbent for CO2 capture.


Activated carbon, Carbon dioxide, Nitrogen, Soybean, Adsorption

  • Asian J. Mat. Chem. /
  •  2018 /
  •  3(4) /
  •  pp 68-71
  • DOI:10.14233/ajmc.2018.AJMC-P65