Agar-Derived Nitrogen-Doped Porous Carbon for CO2 Adsorption

作者：Xu, Jianguo; Cui, Hongmin; Shi, Jinsong^*; Yan, Nanfu; Liu, Yuewei; Li, Dan

来源：ChemistrySelect, 2018, 3(39): 10977-10982.

DOI：10.1002/slct.201802031

• Biomass
• Carbon
• CO2 Adsorption
• Nitrogen Doping

An efficient carbonaceous CO2 adsorbent with doped nitrogen element is derived from agar. Agar was mixed with urea and the mixture was then carbonized. After chemical activation with KOH, nitrogen doped microporous carbon was obtained. The nitrogen content was up to 8.58 wt %, depending on the preparation conditions. The CO2 adsorption properties, including the adsorption isotherms, the isosteric heat of adsorption and the adsorption selectivity were studied. The highest CO2 uptake of 6.5mmol g(-1) (273K, 1bar) was achieved by a carbon activated at 600 degrees C with moderate nitrogen content, while the carbon activated at 550 degrees C exhibited the best CO2/N-2 selectivity of 37. The current work exploits the potential use of agar as carbon precursor for CO2 adsorbent, and provides a convenient and effective approach to nitrogen doping.

• 出版日期2018-10-24
• 单位中国科学院长春应用化学研究所; 江西省科学院