玉米芯活性炭改性及其对CO2吸附性能

doi:10.3969/j.issn.1005-3026.2015.09.016

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (9): 1288-1292.DOI: 10.3969/j.issn.1005-3026.2015.09.016

玉米芯活性炭改性及其对CO₂吸附性能

杜涛，房鑫，刘丽影，张胜东

(东北大学国家环境保护生态工业重点实验室，辽宁沈阳110819)

收稿日期:2014-08-18 修回日期:2014-08-18 出版日期:2015-09-15 发布日期:2015-09-14
通讯作者: 杜涛
作者简介:杜涛(1964-)，女，湖北武汉人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51474067，51406029).

Modification of Corncob Activated Carbon and Adsorption Properties of CO₂

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

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
About author:-
Supported by:
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摘要/Abstract

摘要： 研究了提高玉米芯活性炭对CO₂气体吸附性能的方法和途径，对自制的玉米芯活性炭进行了氧化改性和还原改性.改性后C元素质量分数都减少了10%左右.经硝酸和硝酸盐氧化改性后其表面含氧官能团明显增多；经碳酸盐碱性还原改性后引入了CO^2-₃根；经氨水碱性还原改性后引入了大量氨基基团，表明成功地对制备的玉米芯活性炭进行了氧化和还原改性.其中，利用Ca(NO₃)₂改性后样品对CO₂的吸附量比改性前提高了21.2%；经过Na₂CO₃改性后样品对CO₂的吸附量提高了28.5%.因此，制备的玉米芯活性炭经过Na₂CO₃改性后更有利于其应用于CO₂吸附分离.

关键词: 玉米芯活性炭, 氧化改性, 还原改性, CO₂, 吸附性能

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 CO^2-₃ 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

中图分类号:

TB322

杜涛，房鑫，刘丽影，张胜东. 玉米芯活性炭改性及其对CO₂吸附性能[J]. 东北大学学报:自然科学版, 2015, 36(9): 1288-1292.

DU Tao， FANG Xin， LIU Li-ying， ZHANG Sheng-dong. Modification of Corncob Activated Carbon and Adsorption Properties of CO₂[J]. Journal of Northeastern University:Natural Science, 2015, 36(9): 1288-1292.

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玉米芯活性炭改性及其对CO₂吸附性能

Modification of Corncob Activated Carbon and Adsorption Properties of CO₂

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