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[1]郑新军,岳高伟,霍留鹏,等.煤层封存CO2性能的晶格理论模型及应用[J].中国安全生产科学技术,2017,13(10):30-36.[doi:10.11731/j.issn.1673-193x.2017.10.005]
　ZHENG Xinjun,YUE Gaowei,HUO Liupeng,et al.Lattice theory model and its application on CO2 storing performance of coal seam[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(10):30-36.[doi:10.11731/j.issn.1673-193x.2017.10.005]
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煤层封存CO2性能的晶格理论模型及应用
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
13
期数:
2017年10期
页码:
30-36
栏目:
学术论著
出版日期:
2017-10-30

文章信息/Info

Title:
Lattice theory model and its application on CO2 storing performance of coal seam
文章编号:
1673-193X(2017)-10-0030-07
作者:
郑新军; 岳高伟; 霍留鹏; 曾春林; 梁为民
(河南理工大学 土木工程学院，河南 焦作 454000)
Author(s):
ZHENG Xinjun;  YUE Gaowei;  HUO Liupeng;  ZENG Chunlin;  LIANG Weimin
(School of Civil Engineering, Henan Polytechnic University, Jiaozuo Henan 454000, China)
关键词:
煤层; 晶格理论模型; CO2吸附等温线; 预测
Keywords:
lattice theory model;  coal seam;  CO2 adsorption isotherm;  prediction
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2017.10.005
文献标志码:
A
摘要:
为了更好地在煤层中封存CO2，开展CO2在煤体上跨越临界点的大范围吸附规律（随压力非单调递增）研究尤为重要。基于晶格热力学方程，建立了微孔吸附超临界流体的晶格模型，并对不同温度下不同变质程度煤样的CO2的吸附等温线进行了预测，研究结果表明：CO2在煤上的吸附等温线随压力增加先增大后减小，不再满足I型等温线；CO2分子之间作用势εa虽然远小于CO2分子与孔壁之间的作用势εs，但忽略εa将导致理论吸附量与实测吸附量误差变大；作用势εs与温度正相关，而εa与温度负相关。晶格理论模型（εa≠0）拟合CO2在煤上吸附出现极值的等温线效果良好，相关系数均在0.99以上，其对不同温度下不同变质程度煤的CO2的吸附等温线进行预测结果与实测结果基本一致，其相对误差不超过5%。
Abstract:
In order to better store CO2 in coal seam, it is very important to study the large range adsorption laws (non-monotonically increasing with pressure) of CO2 over the critical point in coal body. Basing on the lattice thermodynamics equation, a lattice model on microporous adsorption of supercritical fluids was established to predict the CO2 adsorption isotherm of coal with different metamorphic grade under different temperature. The results showed that the CO2 adsorption isotherm increased first and then decreased with the increasing pressure, which did not satisfy the type I isotherm. The interaction potential εa among CO2 molecules was much less than the interaction potential εs between CO2 molecule and pore wall, but if we ignored the εa, the error of adsorption capacity between theory and experiment would become bigger. There existed a positive correlation between interaction potential εs and temperature, but a negative correlation between interaction potential εa and temperature. The fitting results of lattice theory model (εa≠0) on the isotherm when CO2 adsorption appeared the extreme value, and the correlation coefficient was more than 0.99. The predicted results of CO2 adsorption isotherm for coal with different metamorphic grade under different temperature were in good agreement with the measured results, and its relative error were all less than 5%.

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备注/Memo

备注/Memo:
国家自然科学基金项目（41772163）; 河南省高校科技创新团队支持计划项目(15IRTSTHN029)
更新日期/Last Update: 2017-11-03