Wettability determination by contact angle measurements: hvbB coal–water system with injection of synthetic flue gas and CO2

Kaveh, N. Shojai; Rudolph, E.S.J.; Wolf, Karl‐Heinz; Ashrafizadeh, Seyed Nezameddin

doi:10.1016/j.jcis.2011.07.091

Cited by 71 publications

(81 citation statements)

References 32 publications

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“…Several pictures were taken from each bubble under the same conditions, in order to check the reproducibility of the determined contact angles. Contact angles were determined using an improved in-house MATLAB routine (Shojai Kaveh et al, 2011 …”

Section: Image Analysismentioning

confidence: 99%

“…For hydrophilic coal the small cleats are filled with water slowing down the mass transfer of the gas from the main cleat system to the particulates (Shojai Kaveh et al, 2011). Arnold and Aplan (1989) found the biggest difference in the wetting behavior between hydrophobic organic macerals and hydrophilic inorganic mineral inclusions.…”

Section: Introductionmentioning

confidence: 99%

“…Because of the chromatographic behavior of coal, direct injection of flue gas eliminates the necessity of flue gas purification prior to the injection into the coal bed. The success of this combined process depends strongly on the wetting behavior of the coal, which is a function of coal rank, ash content, heterogeneity of the coal surface, pressure, temperature and composition of the gas (Shojai Kaveh et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…However, only a few experimental data on the wettability at high pressures and elevated temperatures exist, particularly in the presence of flue gas (Shojai Kaveh et al, 2011;Siemons, 2007;Chi et al, 1987). From the data of Siemons it can be concluded that for highrank coal wetting alteration from water-wet to CO 2 -wet occurs at a pressure as low as 0.27 MPa.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Coal Rank on the Wettability Behavior of Wet Coal System with Injection of Carbon Dioxide and Flue Gas

Shojaikaveh¹,

Rudolph²,

Wolf³

et al. 2012

Proceedings

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SUMMARYThe injection of carbon dioxide (CO2) or flue gas into coal layers enhances the coal bed methane production (ECBM) and is also an option for CO2-storage. The success of this combined process depends strongly on the wetting behavior of the coal, which is a function of coal rank, ash content, pressure, temperature and composition of the gas. Two coal samples have been used for this study representing different ranks: hvBb and semi-anthracite rank. The wettability behaviour of the wet coal samples upon injection of synthetic flue gas and pure CO2 was investigated in a modified pendant drop cell at a constant temperature of 318 K and pressures varying between 0.1-16 MPa. For the hvBb sample, the wettability of the coal surface changed from intermediate-wet to CO2-wet at pressures above 8.5 MPa . When injecting synthetic flue gas, only a change from water-wet to intermediate-wet was observed. For the semi-anthracite rank Selar Cornish sample and CO2 injection this alteration was observed at about 5.3 MPa. Experimental results with synthetic flue gas revealed that the wettability of Selar Cornish coal is intermediate wet at all pressures and the contact angle only slightly increases with increasing pressure.

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Section: Image Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Effect of Coal Rank on the Wettability Behavior of Wet Coal System with Injection of Carbon Dioxide and Flue Gas

Shojaikaveh¹,

Rudolph²,

Wolf³

et al. 2012

Proceedings

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“…After taking pictures at a certain pressure, the pressure inside the cell is increased by adding more gas to the cell. A detailed description of the experimental setup and procedure can be found in previous work (Shojai Kaveh et al 2011).…”

Section: )mentioning

confidence: 99%

Interfacial Tension and Contact Angle Determination in Water-sandstone Systems with Injection of Flue Gas and CO2

Shojaikaveh¹,

Rudolph²,

Rossen³

et al. 2013

Proceedings

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SUMMARYCarbon capture and storage (CCS) has the potential for reducing CO2 emissions to the atmosphere. This option includes storage strategies such as CO2 injection into deep saline aquifers, depleted oil and gas reservoirs, and unmineable coal seams. This process is largely controlled by the interactions between CO2, the reservoir fluid and reservoir rock. In particular, the wettability of the rock matrix has a strong effect on the distribution of the injected CO2 into geological formations.In this study, the wetting behavior of Bentheimer sandstone slabs and CO2 and/or flue gas is investigated by means of contact-angle measurements. In addition, the interfacial tension between CO2 and/or flue gas and connate water was determined. The experiments were conducted in a pendant-drop cell, adapted to allow captive-bubble contact-angle measurements and performed at a constant temperature of 318 K and pressures varying between 0.2 and 15 MPa, typical in-situ conditions.The experimental contact angle measurements show that the Bentheimer sandstone/water system is (and remains) water-wet even at high pressures with CO2 and/or flue gas injection. The determined data of the contact angle of the water-sandstone system demonstrate a strong dependence on the bubble size and surface roughness with CO2 and flue gas injection.

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CO₂wettability of seal and reservoir rocks and the implications for carbon geo-sequestration

2015

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We review the literature data published on the topic of CO 2 wettability of storage and seal rocks. We first introduce the concept of wettability and explain why it is important in the context of carbon geo-sequestration (CGS) projects, and review how it is measured. This is done to raise awareness of this parameter in the CGS community, which, as we show later on in this text, may have a dramatic impact on structural and residual trapping of CO 2 . These two trapping mechanisms would be severely and negatively affected in case of CO 2 -wet storage and/or seal rock. Overall, at the current state of the art, a substantial amount of work has been completed, and we find that:Sandstone and limestone, plus pure minerals such as quartz, calcite, feldspar, and mica are strongly water wet in a CO 2 -water system.Oil-wet limestone, oil-wet quartz, or coal is intermediate wet or CO 2 wet in a CO 2 -water system.The contact angle alone is insufficient for predicting capillary pressures in reservoir or seal rocks.The current contact angle data have a large uncertainty.Solid theoretical understanding on a molecular level of rock-CO 2 -brine interactions is currently limited.In an ideal scenario, all seal and storage rocks in CGS formations are tested for their CO 2 wettability.Achieving representative subsurface conditions (especially in terms of the rock surface) in the laboratory is of key importance but also very challenging.

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Wettability determination by contact angle measurements: hvbB coal–water system with injection of synthetic flue gas and CO2

Cited by 71 publications

References 32 publications

The Effect of Coal Rank on the Wettability Behavior of Wet Coal System with Injection of Carbon Dioxide and Flue Gas

The Effect of Coal Rank on the Wettability Behavior of Wet Coal System with Injection of Carbon Dioxide and Flue Gas

Interfacial Tension and Contact Angle Determination in Water-sandstone Systems with Injection of Flue Gas and CO2

CO₂wettability of seal and reservoir rocks and the implications for carbon geo-sequestration

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Wettability determination by contact angle measurements: hvbB coal–water system with injection of synthetic flue gas and CO2

Cited by 71 publications

References 32 publications

The Effect of Coal Rank on the Wettability Behavior of Wet Coal System with Injection of Carbon Dioxide and Flue Gas

The Effect of Coal Rank on the Wettability Behavior of Wet Coal System with Injection of Carbon Dioxide and Flue Gas

Interfacial Tension and Contact Angle Determination in Water-sandstone Systems with Injection of Flue Gas and CO2

CO2wettability of seal and reservoir rocks and the implications for carbon geo-sequestration

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CO₂wettability of seal and reservoir rocks and the implications for carbon geo-sequestration