Amine-functionalized low-cost industrial grade multi-walled carbon nanotubes for the capture of carbon dioxide

作者：Liu, Qing; Shi, Yao; Zheng, Shudong; Ning, Liqi; Ye, Qing; Tao, Mengna; He, Yi^*

来源：Journal of Energy Chemistry, 2014, 23(1): 111-118.

DOI：10.1016/S2095-4956(14)60124-8

• CO2 adsorption
• multi-walled carbon nanotubes (MWCNTs)
• tetraethylenepentamine (TEPA)
• heat of adsorption
• amine modification

Industrial grade multi-walled carbon nanotubes (IG-MWCNTs) are a low-cost substitute for commercially purified multi-walled carbon nanotubes (P-MWCNTs). In this work, IG-MWCNTs were functionalized with tetraethylenepentamine (TEPA) for CO2 capture. The TEPA impregnated IG-MWCNTs were characterized with various experimental methods including N-2 adsorption/desorption isotherms, elemental analysis, X-ray diffraction, Fourier transform infrared spectroscopy and thermogravimetric analysis. Both the adsorption isotherms of IG-MWCNTs-n and the isosteric heats of different adsorption capacities were obtained from experiments. TEPA impregnated IG-MWCNTs were also shown to have high CO2 adsorption capacity comparable to that of TEPA impregnated P-MWCNTs. The adsorption capacity of IG-MWCNTs based adsorbents was in the range of 2.145 to 3.088 mmol/g, depending on adsorption temperatures. Having the advantages of low-cost and high adsorption capacity, TEPA impregnated IG-MWCNTs seem to be a promising adsorbent for CO2 capture from flue gas.

• 出版日期2014-1
• 单位绍兴文理学院; 浙江大学