[1]段钰锋,周毅,陈晓平,等.煤气化半焦的孔隙结构[J].东南大学学报(自然科学版),2005,35(1):135-139.[doi:10.3969/j.issn.1001-0505.2005.01.029]
 Duan Yufeng,Zhou Yi,Chen Xiaoping Zhao Changsui,et al.Pore structure of gasified coal-char[J].Journal of Southeast University (Natural Science Edition),2005,35(1):135-139.[doi:10.3969/j.issn.1001-0505.2005.01.029]
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煤气化半焦的孔隙结构()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
35
期数:
2005年第1期
页码:
135-139
栏目:
能源与动力工程
出版日期:
2005-01-20

文章信息/Info

Title:
Pore structure of gasified coal-char
作者:
段钰锋 周毅 陈晓平 赵长遂 章名耀 金保升
东南大学洁净煤发电与燃烧技术教育部重点实验室, 南京 210096
Author(s):
Duan Yufeng Zhou Yi Chen Xiaoping Zhao Changsui Zhang Mingyao Jin Baosheng
Key Laboratory of Clean Coal Power Generation and Combustion Technology of Ministry of Education,Southeast University, Nanjing 210096, China
关键词:
部分气化 半焦 孔隙结构 氮吸附
Keywords:
partial gasification coal-char pore structure nitrogen adsorption
分类号:
TK16
DOI:
10.3969/j.issn.1001-0505.2005.01.029
摘要:
用氮气等温吸附(77 K)方法测量了原煤及其加压、常压部分气化后半焦的BET比表面积,并通过BJH法计算了孔比表面积、孔容积、孔径和孔分布.结果表明,原煤在转化为半焦的过程中,孔隙结构变得发达,比表面积、孔比表面积和孔容积明显增大.实验发现半焦的孔比表面积和孔容积分布曲线存在2个明显的峰值,第1个尖峰对应的孔径稍小于2 nm,说明微孔的比表面积大大增加; 第2个尖峰对应的孔径在3.8 nm左右,说明中孔的比表面积增加很快以至于出现了中孔的扩展.加压气化后的半焦孔隙结构更加发达,加压气化比常压气化更能促进半焦孔隙的生成和发展.
Abstract:
The coal-chars derived from atmosphere and pressurized partial gasification processes were measured by nitrogen adsorption principle at 77 K. Specific surface areas were determined based on BET model. Average pore size, total pore volume, pore specific surface area and pore size distribution were statistically obtained by using BJH theory. The results show that more abundant pores and larger specific areas and pore volumes are formed after partial gasification. Two peaks are found in distribution curves of the coal char pore specific surface area and pore volume; the first peak corresponds to a pore diameter of less than 2 nm, the second of about 3.8 nm. Gasification at elevated pressure can largely accelerate the pore formation. The pore development of coal-char at elevated pressure is more rapidly than that at atmosphere condition.

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备注/Memo

备注/Memo:
基金项目: 国家重点基础研究发展计划(973计划)资助项目(G199902210532).
作者简介: 段钰锋(1963—),男,博士,教授,博士生导师,yfduan@seu.edu.cn.
更新日期/Last Update: 2005-01-20