Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (06): 1266-1272.doi: 10.3866/PKU.WHXB201304091

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Preparation of Pentaethylenehexamine-Functionalized Mesocellular Silica Foams and Their Application for CO2 Adsorption

FENG Xing-Xing, XIE Jing, HU Geng-Shen, JIA Ai-Ping, XIE Guan-Qun, LUO Meng-Fei   

  1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
  • Received:2012-12-27 Revised:2013-04-08 Published:2013-05-17
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21203167).

Abstract:

Mesocellular silica foam (MCF) was prepared using P123 (EO20-PO70-EO20) as template and then functionalized with pentaethylenehexamine (PEHA) for CO2 adsorption. The samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorptiondesorption isotherms, Fourier transform infrared (FTIR) spectroscopy and thermal gravimetric analysis (TGA). These results indicated that after modification with PEHA, the structure of the support itself was undamaged. The highest CO2 adsorption capacity of MCF-PEHA was obtained at 75℃. With increasing PEHA loading, the CO2 adsorption capacity increases and approached the highest adsorption capacity (3.55 mmol·g-1) with a 70% (w) PEHA loading. Moisture improved the CO2 adsorption performance of the adsorbents. Repeated adsorption-desorption cycling indicated that the sorbents maintained stable CO2 adsorption capacity after 4 cycles, indicating potential for regeneration of the adsorbents.

Key words: Mesostructure cellar foam, Pentaethylenehexamine, Adsorption, CO2

MSC2000: 

  • O647