CO<sub>2</sub>活化-碱液沸煮制备高介孔率的稻壳活性炭

李大伟; 朱锡锋

CO₂活化-碱液沸煮制备高介孔率的稻壳活性炭

中国科学技术大学安徽省生物质洁净能源重点实验室, 安徽合肥 230026

基金项目: 国家重点基础研究发展计划(2013CB228103)；国家自然科学基金(50930006)；中科院重点部署项目(KGZD-EW-304-3).

详细信息

作者简介:
李大伟|博士研究生. E-mail: ldwei@mail.ustc.edu.cn

中图分类号: TQ424.1
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出版历程
- 收稿日期: 2013-04-26
- 录用日期: 2013-10-30
- 修回日期: 2013-09-23
- 刊出日期: 2013-10-20

Rice husk-based activated carbons with high mesoporosity prepared by a combination of CO₂activation and boiling in an alkaline solution

Key Laboratory for Biomass Clean Energy of Anhui Province|University of Science and Technology of China| Hefei 230026,China

Funds: National Basic Research Program of China (2013CB228103); National Natural Science Foundation of China (50930006); Key Research Program of the Chinese Academy of Sciences (KGZD-EW-304-3).

More Information

Author Bio:
LI Da-wei, Ph.D. Student. E-mail: ldwei@mail.ustc.edu.cn

摘要

摘要: 以CO₂活化-碱液沸煮新工艺制备高介孔率的稻壳活性炭，即先以CO₂活化，后用NaOH溶液沸煮；采用正交试验研究CO₂流量、CO₂活化时间、NaOH浓度、NaOH沸煮时间、液固比对活性炭碘值的影响，并优化制备条件；采用N₂吸脱附法表征活性炭；探讨孔隙发展机理。结果表明：采用CO₂活化-碱液沸煮工艺，可以在无机碱不必经历高温过程的情况下制得介孔率高达79%的稻壳活性炭，其比表面积、孔容积、产率分别达到899m²/g、 0.783cm³/g、 26.2%。
- 活性炭 /
- 介孔 /
- 活化 /
- 稻壳
Abstract: A combination of CO₂activation and boiling in an alkaline solution was used to prepare highly mesoporous rice husk-based activated carbons. An orthogonal experimental design was used to investigate the effects of CO₂flow rate, CO₂activation time, NaOH concentration, boiling time and liquid/solid ratioon the porosity of the activated carbons. Results show that an activated carbon with a high mesopore volume of 79% can be obtained under optimized conditions with no need for high temperature treatment with NaOH. The specific surface area, pore volume and yield of the activated carbon can reach 899 m²·g^-1, 0.783 cm³·g^-1 and 26.2%, respectively.
- Active carbon /
- Mesopore /
- Activation /
- Rice husk