CO2 Capture with Activated Carbon Grafted by Nitrogenous Functional Groups

详细信息    查看全文

• 作者：Changming Zhang ; Wen Song ; Guohua Sun ; Lijing Xie ; Jianlong Wang ; Kaixi Li ; Chenggong Sun ; Hao Liu ; Colin E. Snape ; Trevor Drage
• 刊名：Energy & Fuels
• 出版年：2013
• 出版时间：August 15, 2013
• 年：2013
• 卷：27
• 期：8
• 页码：4818-4823
• 全文大小：322K
• 年卷期：v.27,no.8(August 15, 2013)
• ISSN：1520-5029

文摘

Amino/nitro groups were introduced onto the surface of the activated carbon (AC) with nitration followed by reduction in order to improve its adsorption capacity toward CO₂. These AC samples were characterized by N₂ adsorption/desorption, FTIR, and X-ray photoelectron spectroscopy (XPS). CO₂ adsorption properties of the samples were investigated using a self-regulating high-pressure adsorption apparatus. Results showed that the contents of nitrogen on the treated samples鈥?surface increased from 0% to 1.38 after modification. The maximum CO₂ adsorption capacity of the modified samples can reach 19.07 mmol/g at 298 K and 36.0 bar. The adsorbed amounts of CO₂ on all samples decreased with an increase in the adsorption temperature, but the extent of the decrease with the modified samples was less than that of the raw AC sample. CO₂ adsorption capacities of the modified sample for five cyclic adsorption鈥揹esorption runs were found to be nearly identical.