Tetraethylenepentamine-Modified Silica Nanotubes for Low-Temperature CO2 Capture

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• 作者：Manli Yao ; Yanyan Dong ; Xin Hu ; Xingxing Feng ; Aiping Jia ; Guanqun Xie ; Gengshen Hu ; Jiqing Lu ; Mengfei Luo ; Maohong Fan
• 刊名：Energy & Fuels
• 出版年：2013
• 出版时间：December 19, 2013
• 年：2013
• 卷：27
• 期：12
• 页码：7673-7680
• 全文大小：407K
• 年卷期：v.27,no.12(December 19, 2013)
• ISSN：1520-5029

文摘

The objective of this research is to develop a new type of CO₂ sorbent. The sorbents were synthesized with mesoporous ethane鈥搒ilica nanotubes (E鈥揝NTs) and tetraethylenepentamine (TEPA). They were characterized by nitrogen adsorption/desorption, thermogravimetric analysis, and infrared spectroscopy. A fixed-bed reactor equipped with an online mass spectrometer was used to test the CO₂ capture performances of the sorbents. It was found that 75 掳C is the optimal CO₂ adsorption temperature for amine-impregnated E鈥揝NT sorbents. The highest CO₂ sorption capacities achieved with E鈥揝NTs with 50 wt % TEPA loading (E鈥揝NTs鈥?0%) without and with uses of water vapor are 3.58 and 4.74 mmol/g, respectively, under the conditions of a 10.0% CO₂/N₂ mixture at 75 掳C. Cyclic CO₂ adsorption鈥揹esorption test results indicate that the new composite sorbents are stable and regenerable.