苯酚在活性炭复合材料结构化固定床上的吸附动力学

邵琰; 鄢瑛; 张会平

苯酚在活性炭复合材料结构化固定床上的吸附动力学

1.
五邑大学化学与环境工程学院, 广东江门 529020;
2.
华南理工大学化学与化工学院, 广东广州 510641

基金项目: 广东省自然科学基金(2014A030310164);广东高校优秀青年创新人才培养计划项目(2014KQNCX158);五邑大学青年科研基金(2013zk11);华南理工大学广东省绿色化学产品技术重点实验室研究基金(GC201203).

详细信息

中图分类号: O647.31
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出版历程
- 收稿日期: 2015-02-24
- 录用日期: 2015-09-07
- 修回日期: 2015-06-02
- 刊出日期: 2015-06-28

Adsorption dynamics of phenol in a fixed bed packed with activated carbon and stainless steel fiber-reinforced activated carbon paper

1.
School of Chemical and Environmental Engineering, Wuyi University, Jiangmen 529020, China;
2.
China School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China

Funds: Guangdong Natural Science Foundation (2014A030310164); Foundation for Distinguished Yong Talents in Higher Education of Guangdong, China (2014KQNCX158); Science Foundation for Young Teachers of Wuyi University (2013zk11) and research fund of the Guangdong Provincial Laboratory of Green Chemical Product Technology (GC201203).

摘要

摘要: 以不锈钢微纤、粉状活性炭和粘合剂为原料,采用湿法造纸和烧结工艺制备出纸状微纤包覆活性炭复合材料;在固定床进出口端分别装填颗粒活性炭(13 cm)和微纤包覆活性炭复合材料(2 cm)形成结构化固定床,测定苯酚在颗粒活性炭固定床和结构化固定床上的吸附透过曲线;考察不同实验条件下苯酚在结构化固定床上的吸附动力学,并采用Yoon模型和无效层厚度理论进行理论分析。结果表明,相对于颗粒活性炭固定床,苯酚在结构化固定床上的吸附透过曲线斜率明显增加,苯酚在结构化固定床上的吸附透过曲线斜率随着进口初始浓度的提高或流体流量的增大而增大;根据无效层厚度理论和Yoon模型分别分析计算,苯酚在结构化固定床上的无效层厚度相对于颗粒活性炭固定床的减少了14%,Yoon模型中的吸附速率常数k值明显增加。因此,采用基于微纤包覆活性炭复合材料的结构化固定床,可以强化床层上的吸附传质过程,并提高吸附床层利用率。
- 苯酚 /
- 活性炭 /
- 微纤包覆活性炭复合材料 /
- 吸附动力学 /
- 结构化固定床
Abstract: Stainless steel fiber-reinforced activated carbon paper was prepared by a wet papermaking method, followed by a high temperature treatment, using stainless steel fibers as the reinforcement and coniferous wood pulp cellulose as the binder. A fixed bed for phenol adsorption was made by first packing granular activated carbon to a depth of 13 cm followed by 2 cm of the as-made paper near the outlet. The adsorption dynamics of phenol in the bed were investigated under different experimental conditions. Results show that the breakthrough curve of phenol in the bed is steeper than that in a bed packed only with activated carbon with the same bed height. The breakthrough time of phenol in the bed decreases and the breakthrough curves become sharper with increasing flow rate and inlet concentration. The length of the unused bed decreases by 14% compared with the bed packed with activated carbon only, indicating that mass transfer in the bed and its utilization ratio are improved by the paper packing.
- Phenol /
- Activated carbon /
- Microfibrous composites /
- Adsorption dynamics /
- Structured fixed bed

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