Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (11): 3023-3029.doi: 10.3866/PKU.WHXB20101109

• CATALYSIS AND SURFACE STRUCTURE • Previous Articles     Next Articles

Dynamic Performance of CO2 Adsorption with Amine-Modified SBA-16

SHI Jing-Jin, LIU Ya-Min, CHEN Jie, ZHANG Yu, SHI Yao   

  1. Institute of Industrial Ecology and Environment, Zhejiang University, Hangzhou 310028, P. R. China
  • Received:2010-06-27 Revised:2010-07-31 Published:2010-10-29
  • Contact: SHI Yao E-mail:shiyao@zju.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20976159).

Abstract:

Novel CO2 adsorbents for CO2 removal were prepared by introducing tetraethylenepentamine (TEPA) into SBA-16 type mesoporous silica using a post-synthetic impregnation method. The properties of the mesoporous materials before and after surface modification were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), thermal gravimetric analysis (TGA), and N2 adsorption-desorption. We confirmed that TEPA was loaded onto the surface of the channels in the mesoporous materials. The surface area, pore size, and pore volume of TEPA-loaded SBA-16 decreased with an increase in TEPA loading while its fundamental pore structure was unchanged. The dynamic adsorption of CO2 onto TEPA-loaded SBA-16 as well as its regeneration property was studied in a packed column. The total adsorption capacity and breakthrough capacity increased when the amount of loaded TEPA increased from 10% to 30% (w). The sample impregnated with 30% TEPA showed the highest breakthrough capacity and total adsorption capacity of about 0.625 and 0.973 mmol·g-1 at 60℃, respectively. From 60℃ to 80℃, the CO2 dynamic adsorption behavior of TEPA-loaded SBA-16 was stable. The total adsorption capacity of CO2 on TEPA-loaded SBA-16 dropped slightly (6.45%) after 20 adsorption-desorption regeneration cycles. Their CO2 adsorption behavior was also investigated using the deactivation model, which showed an excellent predictive capability for the breakthrough curves.

 

Key words: SBA-16, Dynamic, Breakthrough curve, Deactivation model, CO2 adsorption

MSC2000: 

  • O647