活性焦孔结构演变规律及对脱硫性能的影响

doi:10.11949/j.issn.0438-1157.20141219

化工学报 ›› 2015, Vol. 66 ›› Issue (3): 1126-1132.DOI: 10.11949/j.issn.0438-1157.20141219

活性焦孔结构演变规律及对脱硫性能的影响

李阳^1,2, 朱玉雯^2,3, 高继慧², 孙飞², 雷鸣¹

1 西安热工研究院有限公司, 陕西西安 710032;
2 哈尔滨工业大学能源科学与工程学院, 黑龙江哈尔滨 150001;
3 天津城建大学能源与安全工程学院, 天津300384

收稿日期:2014-08-12 修回日期:2014-11-14 出版日期:2015-03-05 发布日期:2015-03-05
通讯作者: 李阳
基金资助:
国家自然科学基金-煤炭联合基金项目(51134015)。

Activated coke pore structure evolution and its influence on desulfuration

LI Yang^1,2, ZHU Yuwen^2,3, GAO Jihui², SUN Fei², LEI Ming¹

1 Xi'an Thermal Power Research Institute Co., Ltd., Xi'an 710032, Shaanxi, China;
2 School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China;
3 School of Energy and Safety Engineering, Tianjin Cheng Jian University, Tianjin 300384, China

Received:2014-08-12 Revised:2014-11-14 Online:2015-03-05 Published:2015-03-05
Supported by:
supported by the National Natural Science Foundation of China(51134015).

摘要/Abstract

摘要：

采用气体活化法制备活性焦,通过控制温度和烧失率来控制孔结构生成过程,制取具有特定孔结构的活性焦。采用N₂吸附法对样品的孔结构进行表征,并在固定床实验系统上对不同样品的脱硫性能进行测试研究。研究发现:活性焦制备过程中,低温活化有利于活性焦微孔结构的形成和脱硫性能的提高,微孔是活性焦脱硫反应发生的主要场所,中孔和大孔作为分子扩散通道并具有存储H₂SO₄的作用,微孔比表面积可以作为判断活性焦脱硫性能的关键指标。

关键词: 活性焦, 活化, 孔结构, 吸附性能

Abstract:

Steam activation was used to prepare activated coke (AC). The pore structure generation process was controlled through the control of temperature and burning loss rate, and thus a special pore structure activated coke was prepared. The pore structure of the samples was characterized by N₂ adsorption, and SO₂ adsorption properties of different ACs were studied on the fixed bed system. In the preparation of AC, low temperature activation contributed to formation of micropore structure and improved desulfurization performance. Micropores were the main sites of active coke desulfurization reaction. Mesopores and macro-porous were the diffusion channels for molecules and store H₂SO₄. Microporous surface area could be used as a key indicator to evaluate desulfurization performance of active coke.

Key words: activated coke, activation, pore structure, adsorption properties

中图分类号:

X701.7

李阳, 朱玉雯, 高继慧, 孙飞, 雷鸣. 活性焦孔结构演变规律及对脱硫性能的影响[J]. 化工学报, 2015, 66(3): 1126-1132.

LI Yang, ZHU Yuwen, GAO Jihui, SUN Fei, LEI Ming. Activated coke pore structure evolution and its influence on desulfuration[J]. CIESC Journal, 2015, 66(3): 1126-1132.

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活性焦孔结构演变规律及对脱硫性能的影响

Activated coke pore structure evolution and its influence on desulfuration

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