Abstract:Four porous carbons (MC-AN-700, MC-AN-900, MC-FA-700and MC-FA-900) were prepared using NaY zeolite as a hard template and aniline or furfuryl alcohol as carbon resources, respectively, which were carbonized at 700 ℃ or 900℃. The characteristics of the porous carbons were investigated by powder X-ray diffraction, elemental analysis and N2 adsorption. Low-concentration CO2 dynamic adsorption on the synthesized carbons and a commercial activated carbon (AC) as a comparative adsorbent was studied. Characterization results reveal that the nitrogen and oxygen contents of MC-AN-700are 6.59% and 8.71%, respectively, which are the highest among the five adsorbents. Additionally, MC-FA-900has the most total pore volume (0.73cm3/g) while the micropore volume of AC (0.35cm3/g) is the most. At atmosphere pressure and room temperature, CO2 saturated adsorption amount with initial concentration of 10% follows an order of MC-AN-700 (2.20mmol/g)>MC-AN-900 (1.72mmol/g)>AC(1.59mmol/g) >MC-FA-900 (1.45mmol/g) >MC-FA-700 (1.09mmol/g), resulting from the combined effects of micropore volume and nitrogen content. With concentrations ranging between 2% and 10%, CO2 adsorption amount increases when initial concentration is raised. For different temperatures such as 20℃, 45℃ or 65℃, low temperature is advantageous to enhancing CO2 adsorption. After four times desorption, 91% of the original CO2 adsorption amount on MC-AN-700is kept, which is higher than that on MC-FA-900 (86%) and AC (85%).
刘凤玲, 卢霞, 刘杰, 芮茂凌, 郭照冰. 不同特性的多孔炭对CO2的吸附研究[J]. 中国环境科学, 2014, 34(6): 1404-1409.
LIU Feng-Ling, LU Xia, LIU Jie, RUI Mao-Ling, GUO Zhao-Bing. CO2 adsorption on porous carbons with different characteristics. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(6): 1404-1409.