EVOLVING PORE STRUCTURES OF LIGNITE DURING PYROLYSIS OBSERVED BY COMPUTED TOMOGRAPHY
文献类型：期刊论文
| 作者 | Zhao, Yangsheng1,2; Meng, Qiaorong1,2; Feng, Zengchao1,2; Feng, Zijun1,2; Yang, Dong1,2; Zhang, Yujun3 |
| 刊名 | JOURNAL OF POROUS MEDIA
 |
| 出版日期 | 2017 |
| 卷号 | 20期号:2页码:143-153 |
| 关键词 | lignite microstructure evolution high temperature porosity specific surface area percolation groups |
| ISSN号 | 1091-028X |
| DOI | 10.1615/JPorMedia.v20.i2.40 |
| 英文摘要 | Lignite is a low-rank coal with high moisture, low calorific value, and high volatiles content. To prevent spontaneous lignite combustion and to reduce long-distance transportation costs, we proposed an industrial solution for lignite dehydration modified qualitatively by in situ heat injection. We studied the evolution of lignite pore microstructures by microcomputed tomography up to 600 degrees C. From room temperature to 600 degrees C, pore-structure evolution of lignite occurred in three phases. At room temperature to 200 degrees C (phase I), the numbers of pores and fissures and the specific surface area increased rapidly. At the end of this phase, the porosity increased to 37.9%, the percolation probability exceeded the percolation threshold of 31.17%, and seepage began. During phase II (200 degrees C-500 degrees C), pyrolysis increased the numbers of new pores and fissures significantly. The original and newly developed pores and fissures become interconnected to form larger pores and pore groups. The specific surface area and porosity increased slowly. During phase III, from 500 degrees C to 600 degrees C, the porosity increased rapidly to 47.8%. The ratio of the pore morphology along the long and short axis varied from 2.63 to 3. |
| WOS研究方向 | Thermodynamics ; Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000399381400004 |
| 出版者 | BEGELL HOUSE INC |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3989]  |
| 专题 | 岩土力学所知识全产出_期刊论文 |
| 作者单位 | 1.Chinese Minist Educ, Key Lab In Situ Properties Modified Min ; 2.Taiyuan Univ Technol, Min Inst Technol ; 3.Chinese Acad Sci, Inst Rock & Soil Mech |
| 推荐引用方式 GB/T 7714 | Zhao, Yangsheng,Meng, Qiaorong,Feng, Zengchao,et al. EVOLVING PORE STRUCTURES OF LIGNITE DURING PYROLYSIS OBSERVED BY COMPUTED TOMOGRAPHY[J]. JOURNAL OF POROUS MEDIA,2017,20(2):143-153. |
| APA | Zhao, Yangsheng,Meng, Qiaorong,Feng, Zengchao,Feng, Zijun,Yang, Dong,&Zhang, Yujun.(2017).EVOLVING PORE STRUCTURES OF LIGNITE DURING PYROLYSIS OBSERVED BY COMPUTED TOMOGRAPHY.JOURNAL OF POROUS MEDIA,20(2),143-153. |
| MLA | Zhao, Yangsheng,et al."EVOLVING PORE STRUCTURES OF LIGNITE DURING PYROLYSIS OBSERVED BY COMPUTED TOMOGRAPHY".JOURNAL OF POROUS MEDIA 20.2(2017):143-153. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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