Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (01): 195-200.doi: 10.3866/PKU.WHXB201228195

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Grafting Morphologies of TEPA on SBA-15(P) and Its Effect on CO2 Adsorption Performance

YANG Yong-Hong1,2, LI Fen-Fen1,3, YANG Cheng1, ZHANG Wen-Yu3, WU Jin-Hu1   

  1. 1. Key Laboratory of Biofuels, Qindao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong Province, P. R. China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China;
    3. Shandong Polytechnic University, Jinan 250353, P. R. China
  • Received:2011-08-08 Revised:2011-10-10 Published:2011-12-29
  • Contact: YANG Cheng E-mail:yangcheng@qibebt.ac.cn
  • Supported by:

    The project was supported by the Natural Science Foundation of Shandong Province, China (2009ZRB01250) and Technology Development Program of Qingdao Government, China (1263194353127).

Abstract: Various amine-functionalized CO2 adsorbents were prepared by incorporating tetraethylenepenthamine (TEPA) onto SBA-15(P) by controlling the impregnation method and its process. The materials were characterized using X-ray diffraction (XRD), N2-adsorption, elemental analysis, and Fourier transform infrared (FTIR) techniques. Their adsorptive capacities were determined by CO2-temperature programmed desorption (TPD). The results indicate that the dynamic impregnation process using a TEPA ethanol solution was successful in loading TEPA into the channels of SBA-15(P). Moreover, bonding formation between the highly dispersed TEPA and SBA-15(P) was facilitated to CO2 adsorption/desorption. Therefore, a binding mechanism is proposed. The -NH2 group of TEPA forms hydrogen bonds with -OH and C-O-C groups on SBA-15(P), which results in the better dispersion of TEPA. However, the dynamic impregnation process for the TEPA ethanol solution can effectively avoid the formation of hydrogen bonds between the intra- and inter-molecules resulting in the high adsorptive capacity of the amino groups in TEPA.

Key words: SBA-15(P), TEPA, CO2, Dynamic impregnation, Bond formation, Adsorptive capacity

MSC2000: 

  • O643