Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (8): 1602-1608.doi: 10.3866/PKU.WHXB201506181

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles     Next Articles

Nitrogen-Enriched Hierarchical Porous Carbon for Carbon Dioxide Adsorption and Separation

Zhen-Yu. JIN,Tong. LI,An-Hui. LU*()   

  • Received:2015-05-08 Published:2015-08-12
  • Contact: An-Hui. LU E-mail:anhuilu@dlut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21473021);Specialized Research Fund for the DoctoralProgram of Higher Education, China(20120041110019)

Abstract:

Hierarchical nitrogen-enriched porous carbon containing micropores, mesopores, and macropores were prepared by a nanocasting pathway using a Schiff base precursor and SBA-15 as the hard template. The specific surface area and pore volume of the obtained porous carbon are 752 m2·g-1 and 0.79 cm3·g-1, respectively. The nitrogen content is as high as 7.85% (w). The porous carbon shows a CO2 capacity of 97 cm3·g-1 at ambient pressure and 273 K. The CO2/N2 and CO2/CH4 separation ratios (molar ratios) are accordingly 7.0 and 3.2, and the Henry's low pressure selectivities are 23.3 and 4.2, respectively. CO2 adsorption tests confirmed that the micropores play a dominant role and nitrogen-containing functional groups play a synergistic role. The predicted ideal adsorbed solution theory (IAST) selectivities of the two-component mixed stream are 40 (CO2/N2) and 18 (CO2/CH4) by Toth mode simulation.

Key words: Schiff-base, Hierarchical porous carbon, Nitrogen-rich, Carbon dioxide capture

MSC2000: 

  • O647