An experimental study of the effect of electric field enhancement on the adsorption characteristics of coalbed methane
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View abstract on PubMed
Summary
This summary is machine-generated.Applying electric fields to coal seams reduces coalbed methane (CBM) adsorption, enhancing gas extraction. This method improves methane migration and diffusion in low-permeability reservoirs.
Area Of Science
- Geosciences
- Energy Science
Background
- Coalbed methane (CBM) extraction from the Qinshui Coalfield is limited by reservoir characteristics.
- Enhancing CBM recovery requires modifying gas adsorption and improving extraction efficiency.
Purpose Of The Study
- To investigate the effect of external electric fields on CBM adsorption in anthracite coal.
- To determine the influence of electric field strength on adsorption capacity and methane diffusion.
Main Methods
- Analysis of coal quality for #9 and #15 anthracite samples.
- Experimental determination of CBM adsorption isotherms and constants using a custom-built device.
- Examination of pore structure parameters under electric field influence.
Main Results
- Electric fields significantly reduce CBM adsorption capacity in coal.
- Maximum adsorbed quantity decreases linearly, and empirical adsorbed constant decreases exponentially with increasing electric field strength.
- Increased median pore diameter enhances methane migration and diffusion.
Conclusions
- Electric field treatment is a viable method to reduce CBM adsorption and improve extraction efficiency.
- The study provides theoretical insights for methane extraction from low-pressure, low-permeability CBM reservoirs.
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