3216-98-6Relevant academic research and scientific papers
Development of efficient amine-modified mesoporous silica SBA-15 for CO2 capture
Zhang, Xiaoyun,Qin, Hongyan,Zheng, Xiuxin,Wu, Wei
, p. 3981 - 3986 (2013/09/02)
A novel CO2 sorbent was prepared by impregnating mesoporous silica, SBA-15, with acrylonitrile (AN)-modified tetraethylenepentamine (TEPA) in order to increase CO2 adsorption capacity and improve cycling stability. The mesoporous silica with pre- and post-surface modification was investigated by X-ray diffraction characterization (XRD), N2 adsorption-desorption test (N2-BET), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA). The adsorption/desorption performance of S-TN (TN: AN modified TEPA) and S-TEPA was studied by dynamic adsorption. Test results showed that the solid base-impregnated SBA-15 demonstrated high CO2 adsorption capacity (180.1 mg g-1-adsorbent for 70% amine loading level). Compared to S-TEPA (24.1% decrease of initial capacity), S-TN with 50% amine loading exhibited improved cycling stability, 99.9% activity reserved (from initial 153.0 mg g-1 to 151.3 mg g-1) after 12 cycles of adsorption/desorption at 100 C. A mechanism of molecular structure of the loaded amine was attributed to the improved performance.
