Diopside dissolution kinetics as a function of pH, CO2, temperature, and time

Knauss, Kevin G.; Nguyen, Son; Weed, H.C.

doi:10.1016/0016-7037(93)90431-u

Cited by 143 publications

(89 citation statements)

References 27 publications

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“…It is worth noting that the values of Chen and Brantley (1998) at 25¡C and acidic pH are slightly lower than those published by other authors (e.g. Schott et al 1982;Knauss et al 1993;Golubev et al 2005), although all of the studies agree that dissolution kinetics are very slow. Augite dissolves more rapidly at 25¡C under very acidic pH of 1 to 3 (approximately 10 -7 to 10 -9 mol/m 2 /s) but the reaction rate decreases with pH greater than 4.…”

Section: Carbon Dioxide-water-rock Interactions In Reservoir Rocks Ancontrasting

confidence: 48%

“…Chen and Brantley (1998) provide dissolution rates of diopside at 25 (~10 -9 mol/m 2 /s for pH <4) and 90¡C (~10 -7 to 10 -8 mol/m 2 /s) under acidic conditions (pH 1 to 4), these values are about an order of magnitude lower than the values of Golubev et al (2005) for the same pH range. At these conditions and up to pH values of ~10, at which the dissolution rate is ~10 -9 mol/m 2 /s (Knauss et al 1993;Golubev et al 2005), diopside dissolves non-stoichiometrically at early stages of reaction and until it reaches a stoichiometric steady state. In more basic solutions a preferential release of silica suggests the formation of a Ca-Mg-rich layer on mineral surfaces ).…”

Section: Carbon Dioxide-water-rock Interactions In Reservoir Rocks Anmentioning

confidence: 99%

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Experimental Perspectives of Mineral Dissolution and Precipitation due to Carbon Dioxide-Water-Rock Interactions

Kaszuba

Yardley

Andréani

2013

Reviews in Mineralogy and Geochemistry

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Section: Carbon Dioxide-water-rock Interactions In Reservoir Rocks Ancontrasting

confidence: 48%

Section: Carbon Dioxide-water-rock Interactions In Reservoir Rocks Anmentioning

confidence: 99%

Experimental Perspectives of Mineral Dissolution and Precipitation due to Carbon Dioxide-Water-Rock Interactions

Kaszuba

Yardley

Andréani

2013

Reviews in Mineralogy and Geochemistry

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“…Acidified CO 2 -rich brines may react with caprock minerals that are susceptible to dissolution, releasing ions into the solution that could lead to mineral precipitation (Knauss et al, 1993;Brady and Carroll, 1994;Pokrovsky et al, 2009;Hellmann et al, 2010;Smith and Carroll, 2014). Mineralogical changes affect porosity, pore structure, and hydrodynamic and mechanical properties of caprocks (Park et al, 2011;Vilarrasa et al, 2013), potentially changing storage capacity (Alcalde et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Interaction between a fractured marl caprock and CO2-rich sulfate solution under supercritical CO2 conditions

Dávila

Luquot

Soler

et al. 2016

International Journal of Greenhouse Gas Control

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Please cite this article in press as: Dávila, G., et al., Interaction between a fractured marl caprock and CO 2 -rich sulfate solution under supercritical CO 2 conditions. Int. J. Greenhouse Gas Control (2015), http://dx.doi.org/10.1016/j.ijggc.2015.11.005 Geological CO 2 sequestration at pilot-plant scale will be developed at Hontomín (Spain). CO 2 will be injected into a limestone reservoir that contains a NaCl-and sulfate-rich groundwater in equilibrium with calcite and gypsum. The caprock site is composed of marl. The present study seeks to evaluate the interaction between the Hontomín marl and CO 2 -rich sulfate solutions under supercritical CO 2 conditions (P Total = 150 bar, pCO 2 = 61 bar and T = 60 • C). Flow-through percolation experiments were performed using artificially fractured cores to elucidate (i) the role of the composition of the injected solutions (S-free and S-rich solutions) and (ii) the effect of the flow rate (0.2, 1 and 60 mL h −1 ) on fracture permeability. Major dissolution of calcite (S-free and S-rich solutions) and precipitation of gypsum (S-rich solution) together with minor dissolution of the silicate minerals contributed to the formation of an altered skeleton-like zone (mainly made up of unreacted clays) along the fracture walls. Dissolution patterns changed from face dissolution to wormhole formation and uniform dissolution with increasing Peclet numbers. ARTICLE IN PRESSIn S-free experiments, fracture permeability did not significantly change regardless of the flow rate despite the fact that a large amount of calcite dissolved. In S-rich solution experiments, fracture permeability decreased under slow flow rates (0.2 and 1 mL h −1 ) because of gypsum precipitation that sealed the fracture. At the highest flow rate (60 mL h −1 ), fracture permeability increased because calcite dissolution predominated over gypsum precipitation.

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“…Keywords: CO 2 sequestration, Permeability, Dissolution rate, Precipitation, Anorthite (Blunt et al, 1993 (Wogelius and Walther, 1991;Knauss, et al, 1993)や，CO 2 に飽和した溶液を使用したものが多く (Brady and Carroll, 1994;Carroll and Knauss, 2005;Wigand et al, 2008 など) (Drever and Clow, 1995)…”

Section: 渡辺雅一(Masakazu Watanabe) mentioning

confidence: 99%

Dissolution and precipitation between pH 3.8-, CO2 dissolved-solution and anorthite rich tuffaceous sandstone by using high temperature flow-through reactor

英二¹,

雅一²

2009

Japanese Magazine of Mineralogical and Petrological Sciences

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Diopside dissolution kinetics as a function of pH, CO2, temperature, and time

Cited by 143 publications

References 27 publications

Experimental Perspectives of Mineral Dissolution and Precipitation due to Carbon Dioxide-Water-Rock Interactions

Experimental Perspectives of Mineral Dissolution and Precipitation due to Carbon Dioxide-Water-Rock Interactions

Interaction between a fractured marl caprock and CO2-rich sulfate solution under supercritical CO2 conditions

Dissolution and precipitation between pH 3.8-, CO2 dissolved-solution and anorthite rich tuffaceous sandstone by using high temperature flow-through reactor

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