scholarly journals Effect of Electric Potential Gradient on Methane Adsorption and Desorption Behaviors in Lean Coal by Electrochemical Modification: Implications for Coalbed Methane Development of Dongqu Mining, China

ACS Omega ◽  
2020 ◽  
Vol 5 (37) ◽  
pp. 24073-24080
Author(s):  
Guanxian Kang ◽  
Tianhe Kang ◽  
Junqing Guo ◽  
Jianting Kang ◽  
Runxu Zhang ◽  
...  
Keyword(s):  
Electric Potential ◽  
Coalbed Methane ◽  
Potential Gradient ◽  
Methane Adsorption ◽  
Adsorption And Desorption ◽  
Electrochemical Modification ◽  
Lean Coal

Removal of heavy metal from soil and groundwater by in-situ electrokinetic remediation

2000 ◽  
Vol 42 (7-8) ◽  
pp. 335-343 ◽  
Author(s):  
S. Shiba ◽  
S. Hino ◽  
Y. Hirata ◽  
T. Seno
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Electric Potential ◽  
Potential Gradient ◽  
Electrokinetic Remediation ◽  
Contaminated Aquifer ◽  
Physico Chemical ◽  
Operational Variables ◽  
Mass Transport Process

The operational variables of electrokinetic remediation have not been cleared yet, because this method is relatively new and is an innovative technique in the aquifer remediation. In order to investigate the operational variables of the electrokinetic remediation, a mathematical model has been constructed based on the physico chemical mass transport process of heavy metals in pore water of contaminated aquifer. The transport of the heavy metals is driven not only by the hydraulic flow due to the injection of the purge water but also by the electromigration due to the application of the electric potential gradient. The electric potential between anode and cathode is the important operational variable for the electrokinetic remediation. From the numerical simulations with use of this model it is confirmed that the remediation starts from the up stream anode and gradually the heavy metal is transported to the down stream cathode and drawn out through the purge water.

Role of chemical structures in coalbed methane adsorption for anthracites and bituminous coals

Adsorption ◽  
2017 ◽  
Vol 23 (5) ◽  
pp. 711-721 ◽  
Author(s):  
Yongshuai Fu ◽  
Xianfeng Liu ◽  
Boqing Ge ◽  
Zhenghong Liu
Keyword(s):  
Coalbed Methane ◽  
Methane Adsorption ◽  
Chemical Structures ◽  
Bituminous Coals

scholarly journals The influence of temperature on methane adsorption in coal: A review and statistical analysis

2019 ◽  
Vol 37 (9-10) ◽  
pp. 745-763 ◽  
Author(s):  
Zhijun Wang ◽  
Xiaojuan Wang ◽  
Weiqin Zuo ◽  
Xiaotong Ma ◽  
Ning Li
Keyword(s):  
Coalbed Methane ◽  
Methane Adsorption ◽  
Gas Content ◽  
Future Research ◽  
Temperature Dependent ◽  
Current State ◽  
Influence Of Temperature On ◽  
State Of Research ◽  
Increasing Temperature ◽  
The Relationship

The capacity of coal to adsorb methane is greatly affected by temperature and, in recent years, temperature-dependent adsorption has been studied by many researchers. Even so, comprehensive conclusions have not been reached and conflicting experimental results are common. This paper reviews the current state of research regarding the temperature-dependent adsorption of methane in coal and catalogs the conclusions from experiments conducted on that subject by 28 researchers, as published between 1995 and 2017. Probability theory and statistics are used to show that the conclusion generally accepted by most researchers is that the amount of methane adsorbed by coal decreases with increasing temperature. It is highly likely that the Langmuir volume decreases as the temperature rises, and it is also probable that the Langmuir pressure increases at higher temperatures. Equations are presented that express the relationships between methane adsorption, Langmuir volume, Langmuir pressure, and temperature. Future research should be directed toward determining the relationship between Langmuir pressure and temperature. The results of the study presented herein provide a theoretical basis for predicting the gas content in coal seams and improving the efficiency of coalbed methane development.

Modified SLD model for coalbed methane adsorption under reservoir conditions

2019 ◽  
Vol 12 (18) ◽  
Author(s):  
Xiaojun Wu ◽  
Zhengfu Ning ◽  
Guoqing Han ◽  
Qing Wang ◽  
Ziyao Zhong ◽  
...  
Keyword(s):  
Coalbed Methane ◽  
Methane Adsorption ◽  
Reservoir Conditions
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