Effects of adsorption–active media on the mechanical propreties of catalysts and adsorbents

Shchukin, E. D.; Bessonov, A. I.; Kontorovich, S. I.; Polukarova, Z. M.; Sokolova, L. N.; Амелина, Е. А.; Burenkova, L. N.; Romanovsky, B.V.

doi:10.1016/j.colsurfa.2005.09.022

Cited by 9 publications

(2 citation statements)

References 19 publications

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“…Our data show that altering the chemical composition of the fluid in contact with the sample may affect the mechanical properties of single calcite crystals, as predicted by the Rehbinder effect [Shchukin et al, 2006]. Changing the surrounding fluid of the sample will affect the surface energy, thus changing the strength of the sample.…”

Section: Discussionmentioning

confidence: 84%

“…given as  0 − 2 e = 0, where the subscript e refers to the chemical environment in contact with the fracture surfaces. The phenomenon of altering the mechanical strength of a solid by introducing adsorption-active media into the system is known as the Rehbinder effect [Shchukin et al, 2006]. As this effect is only dependent on the initial surface energy of the solid and the ions introduced into the system, similar results ought to be expected for calcitic rocks and pure calcite.…”

Section: Introductionmentioning

confidence: 91%

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The effect of fluid composition, salinity, and acidity on subcritical crack growth in calcite crystals

et al. 2016

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Chemically activated processes of subcritical cracking in calcite control the time‐dependent strength of this mineral, which is a major constituent of the Earth's brittle upper crust. Here experimental data on subcritical crack growth are acquired with a double torsion apparatus to characterize the influence of fluid pH (range 5–7.5) and ionic strength and species (Na2SO4, NaCl, MgSO4, and MgCl2) on the propagation of microcracks in calcite single crystals. The effect of different ions on crack healing has also been investigated by decreasing the load on the crack for durations up to 30 min and allowing it to relax and close. All solutions were saturated with CaCO3. The crack velocities reached during the experiments are in the range 10−9–10−2 m/s and cover the range of subcritical to close to dynamic rupture propagation velocities. Results show that for calcite saturated solutions, the energy necessary to fracture calcite is independent of pH. As a consequence, the effects of fluid salinity, measured through its ionic strength, or the variation of water activity have stronger effects on subcritical crack propagation in calcite than pH. Consequently, when considering the geological sequestration of CO2 into carbonate reservoirs, the decrease of pH within the range of 5–7.5 due to CO2 dissolution into water should not significantly alter the rate of fracturing of calcite. Increase in salinity caused by drying may lead to further reduction in cracking and consequently a decrease in brittle creep. The healing of cracks is found to vary with the specific ions present.

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Section: Discussionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 91%

The effect of fluid composition, salinity, and acidity on subcritical crack growth in calcite crystals

et al. 2016

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Effects of Adsorption‐Active Media on the Mechanical Properties of Catalysts and Adsorbents

et al. 2006

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Inorganic chemistry Inorganic chemistry Z 0100Effects of Adsorption-Active Media on the Mechanical Properties of Catalysts and Adsorbents -[81 refs.]. -(SHCHUKIN, E. D.; BESSONOV, A. I.; KONTOROVICH, S. I.; POLUKAROVA, Z. M.; SOKOLOVA, L. N.; AMELINA, E. A.; BURENKOVA, L. N.; ROMANOVSKY, B. V.; Colloids Surf., A 282/283 (2006) 287-297; Dep. Chem., Johns Hopkins Univ., Baltimore, MD 21218, USA; Eng.) -Schramke 40-230

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Effect of fluid saturation and salinity on sandstone rock weakening: experimental investigations and interpretations from physicochemical perspective

et al. 2022

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Fluid saturation plays an important role in rock weakening. However, few researches reveal the controlling factor(s) behind the rock weakening particularly from geochemical perspective. We performed rock failure/fracture reactivation tests on dry and wet samples (saturated with high/low salinity brine). We examined the effect of fluid saturation and salinity on rock mechanical properties through a unique triaxial compression system with combination of micro-seismicity monitoring. Besides, the induced time-dependent micro-seismicity events were located to characterize the fracture orientation together with medical CT imaging. Moreover, we performed geochemical modelling to link the surface energy to rock mechanics from geochemical perspective.Our results show that the peak stress of saturated samples is 11.7% to 15.0% less than unsaturated samples, confirming that fluid saturation can weaken rock. Lowering salinity appears to play a negligible role in the reduction of elastic modulus and peak stress of intact sandstones. We also did not observe the expansion of micro-seismicity cloud along main fracture plane, suggesting that lowering salinity may not trigger micro-fracture generation under confining condition. However, sample saturated with low salinity brine shows a much slower increase rate of differential stress during the plastic deformation to reach yield point during fracture reactivation process compared to the sample saturated with high salinity brine. This work contributes to the existing knowledge of rock weakening by providing quantitative geochemical characterization with implications in water-assisted enhancing hydrocarbon recovery and CO2 geological storage.

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Effects of adsorption–active media on the mechanical propreties of catalysts and adsorbents

Cited by 9 publications

References 19 publications

The effect of fluid composition, salinity, and acidity on subcritical crack growth in calcite crystals

The effect of fluid composition, salinity, and acidity on subcritical crack growth in calcite crystals

Effects of Adsorption‐Active Media on the Mechanical Properties of Catalysts and Adsorbents

Effect of fluid saturation and salinity on sandstone rock weakening: experimental investigations and interpretations from physicochemical perspective

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