The influence of moisture content on coal deformation and coal permeability during coalbed methane (CBM) production in wet reservoirs

Talapatra, Akash; Karim, Md. Mostafijul

doi:10.1007/s13202-020-00880-x

Cited by 22 publications

(9 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This affects the heat rate performance of the thermal power plants. Talapatra et al [26] state that moisture content present in the coal affects the combustion process and reduces the efficiency of coal. The identified challenges with descriptions and the relevant references are provided in Table 1.…”

Section: The Challenges Affecting the Heat Rate Of Thermal Power Plantsmentioning

confidence: 99%

Modeling Challenges for Improving the Heat Rate Performance in a Thermal Power Plant: Implications for SDGs in Energy Supply Chains

et al. 2022

View full text Add to dashboard Cite

Rapid industrialization and the increased use of consumer electronic goods have increased the demand for energy. To meet the increasing energy demand, global nations are looking for energy from renewable sources rather than non-renewable sources, to adhere with the sustainability principle. As energy from renewable sources is still in the experimental stage, there is a need to use available energy sources optimally. Considering this, the present study aims to identify, evaluate, and reveal the interrelationship among critical challenge factors in improving the heat rate performance of coal-fired thermal power plants. The study identifies twenty critical challenges through a comprehensive literature review. Then, to evaluate the identified critical challenges, the grey-DEMATEL (Decision Making Trial and Evaluation Laboratory) technique is used. For evaluating the challenges, this study conducts an empirical analysis in a thermal power plant in India. The findings reveal that air preheater leakage, coal flow balancing, and air heater air outlet temperature are the top three critical challenges hampering the thermal power plant’s performance. Additionally, fourteen challenges come under the cause group, while eight challenges come under the effect group. The findings of the study can assist industrial managers in overcoming problems in their thermal power plants. The results can also guide the development of a robust and reliable framework for mitigating these challenges.

show abstract

Section: The Challenges Affecting the Heat Rate Of Thermal Power Plantsmentioning

confidence: 99%

Modeling Challenges for Improving the Heat Rate Performance in a Thermal Power Plant: Implications for SDGs in Energy Supply Chains

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Building out a fully cross‐coupled model of coal gas‐moisture relationships for CBM production prediction is crucial. Recognizing this, some recent studies have considered the influences of moisture content and rank on sorption‐induced coal deformation 21,22 . However, there are still insufficient data currently available for making quantitative analyses.…”

Section: Introductionmentioning

confidence: 99%

Effects of pore morphology and moisture on CBM‐related sorption‐induced coal deformation: An experimental investigation

Chu

Liu

Wang

et al. 2021

Energy Science & Engineering

View full text Add to dashboard Cite

Coalbed methane (CBM) is an important resource of energy. For CBM recovery, sorption‐induced coal deformation can cause significant reservoir permeability change. Moisture content and coal pore morphology affect the gas adsorption capacity and can alter the coal deformation of the coal seam. Therefore, it is crucial to establish a coal gas moisture‐coupled model for CBM production prediction. However, there are currently insufficient data available for quantitative analyses. In this paper, a series of typical sorption‐induced strain experiments were carried out during methane adsorption and desorption on coal samples with different metamorphic degrees and moisture content. The pore morphology and adsorption capacity of coals were measured to analyze the reason for different deformation of coals with various pore structures and moisture. Results show that the adsorption capacity and deformation is corresponding to the specific surface area of micropore, which first decreases and then increases with coal ranks. The deformation and adsorption gas content of dried coals is greater than that of natural moisture coals, which means that moisture can reduce the sorption capacity of coals, resulting in the decrease of gas adsorption‐induced coal deformation. There is also residual deformation of coal samples after gas desorption caused by the residual adsorbed gas in coals. This paper quantitatively investigates the effects of pore characteristics and moisture on coal deformation and the internal mechanism. This work will provide essential information for building out a fully cross‐coupled model of coal gas‐moisture relationships for CBM production prediction.

show abstract

“…In addition to distinguishing the difference of the WVA process between pores and fractures, Sun et al also distinguished hydrophobic organic pores and hydrophilic inorganic pores in shale, and they believed that the pores in organic matter can be simplified as a cylindrical pore model. Several experimental studies have been carried out to show that the presence of water in coal can significantly affect CBM production, − and some researchers attribute that the water occurrence caused CBM production decline to the water blocking effect. , To date, research on the water blocking effect is relatively mature, but there is a lack of research on water blocking caused by WVA. Especially, for nanopore-rich coal, WVA is more easily to cause capillary condensation .…”

Section: Introductionmentioning

confidence: 99%

DLVO-Based Analyses of the Water Vapor Adsorption and Condensation in Hydrophilic Nanopores of Low-Rank Coal

Yao

Liu

et al. 2021

Energy Fuels

View full text Add to dashboard Cite

Several laboratory studies have reported that the presence of moisture will significantly affect the production of coalbed methane (CBM), but the impact of a water film formed by moisture on the transport of CBM and CO2-enhanced CBM recovery (CO2-ECBM) is still poorly understood. Furthermore, there are also few studies about the formation mechanism of thin water films on the hydrophilic surface in coal. In this study, the Derjaguin–Landau–Verwey–Overbeek (DLVO) theory was applied to analyze the formation mechanism of the thin water film on the hydrophilic surface in coal. Two different pore models, the cylindrical and slit pore model, were developed to interpret the experimental water vapor adsorption (WVA) isotherms. We proposed a DLVO theory-based model combined pore size distribution functions, which can be used to analyze the differences in the moisture status in pores with different sizes under the same humidity conditions. Besides, the mechanism of methane blocked by WVA was also theoretically explored. It was found that water molecules can form capillary condensation even at low relative humidity (RH). Also, the model proposed in this work is useful for providing theoretical guidance for the study of RH and water condensation on the CBM flow and production. According to the presented research, we argue that the mechanism of CO2-ECBM is not only related to competitive adsorption but also related to the displacement of CH4 locked by water.

show abstract

The influence of moisture content on coal deformation and coal permeability during coalbed methane (CBM) production in wet reservoirs

Cited by 22 publications

References 36 publications

Modeling Challenges for Improving the Heat Rate Performance in a Thermal Power Plant: Implications for SDGs in Energy Supply Chains

Modeling Challenges for Improving the Heat Rate Performance in a Thermal Power Plant: Implications for SDGs in Energy Supply Chains

Effects of pore morphology and moisture on CBM‐related sorption‐induced coal deformation: An experimental investigation

DLVO-Based Analyses of the Water Vapor Adsorption and Condensation in Hydrophilic Nanopores of Low-Rank Coal

Contact Info

Product

Resources

About