Journal of Northeastern University:Natural Science ›› 2015, Vol. 36 ›› Issue (9): 1288-1292.DOI: 10.3969/j.issn.1005-3026.2015.09.016

• Materials & Metallurgy • Previous Articles     Next Articles

Modification of Corncob Activated Carbon and Adsorption Properties of CO2

DU Tao, FANG Xin, LIU Li-ying, ZHANG Sheng-dong   

  1. State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China.
  • Received:2014-08-18 Revised:2014-08-18 Online:2015-09-15 Published:2015-09-14
  • Contact: LIU Li-ying
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Abstract: The method to improving the adsorption properties of CO2 of as-synthesized corncob activated carbon was investigated. The oxidative modification and reductive modification were carried out. The results showed the content of carbon (C) reduces by approximate 10% during the process. The samples modified by nitric acid and nitrates obtained more oxygenic functional groups on the surfaces. Those treated with carbonates acquired additional CO2-3 as well. Those improved via ammonia introduced a mass of amidogens. To sum up, oxidative and reductive modifications are well applied to the synthetic activated carbons. In particular, the CO2 adsorbing capacities of samples modified with Ca(NO3)2 and Na2CO3, compared with that of the raw activated carbon, increase by 21.2% and 28.5%, respectively. Therefore, the reductive modification with carbonates such as Na2CO3 performs better in improving the CO2 adsorption capacities of the as-synthesized corncob activated carbon.

Key words: corncob activated carbon, oxidative modification, reductive modification, CO2, adsorption properties

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