The kinetics of calcite dissolution in acetic acid solutions

Fredd, C.N.; Fogler, H. Scott

doi:10.1016/s0009-2509(98)00192-4

Cited by 194 publications

(119 citation statements)

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“…At a sufficiently-high angular velocity, surface reaction becomes the rate determining step and the overall reaction rate obtained experimentally will be free of mass transfer effects. The technique has also been applied to vary the concentration of the reactants and products on the solid surface in a controlled manner and to evaluate the reaction rate, ion diffusion coefficient and the order of reaction [32,33].…”

Section: Introductionmentioning

confidence: 99%

Kinetics of calcite dissolution in CO2-saturated water at temperatures between (323 and 373) K and pressures up to 13.8 MPa

et al. 2015

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We report measurements of the calcite dissolution rate in CO2-saturated water at pressures ranging from (6.0 to 13.8) MPa and temperatures from (323 to 373) K. The rate of calcite dissolution in HCl(aq) at temperatures from (298 to 353) K was also measured at ambient pressure with pH between 2.0 and 3.3. A specially-designed batch reactor system, implementing a rotating disc technique, was used to obtain the dissolution rate at the solid/liquid interface of a single crystal, free of mass transfer effects. We used Vertical Scanning Interferometry to examine the texture of the calcite surface produced by the experiment and the results suggested that at far-from-equilibrium conditions, the measured calcite dissolution rate was independent of the initial defect density due to the development of a dynamic dissolution pattern which became steady-state shortly after the onset of dissolution. The results of this study indicate that the calcite dissolution rate under surface-reactioncontrolled conditions increases with increase of temperature from (323 to 373) K and CO2 partial pressure from (6.0 to 13.8) MPa. Fitting the conventional first order transition state kinetic model to the observed rate suggested that, although sufficient to describe calcite dissolution in CO2-free HCl(aq), this model clearly underestimate the calcite dissolution rate in the (CO2 + H2O) system over the range of conditions studied. A kinetic model incorporating both pH and the activity of CO2(aq) has been developed to represent the dissolution rates found in this study. We report correlations for the corresponding reaction rate coefficients based on the Arrhenius equation and compare the apparent activation energies with values from the literature. The results of this study should facilitate more rigorous modelling of mineral dissolution in deep saline aquifers used for CO2 storage.2

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Section: Introductionmentioning

confidence: 99%

Kinetics of calcite dissolution in CO2-saturated water at temperatures between (323 and 373) K and pressures up to 13.8 MPa

et al. 2015

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“…The problem considered is a synthetic core sample of calcite. The 251 dissolution of calcite can be presented as Fredd and Fogler, (1998b) We assume a domain in 2D. We use a uniform discretisation of 250 by 100 mesh corresponding to 0.2 274 cm⨯0.2 cm gridblocks.…”

Section: Sequestration 108mentioning

confidence: 99%

Impact of phase saturation on wormhole formation in rock matrix acidizing

Babaei

Sedighi

2018

Chemical Engineering Science

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8Studies of the rock matrix acidizing for enhanced recovery of oil or gas have entirely focused on the 9 fully water saturated conditions. In fact, matrix acidizing can be conducted in low-water-cut oil-10 production wells without pre-flushing of water or in high water production by injecting gas or oil 11 ahead of the acid injection. These conditions yield a multiphase system, where the dynamics of acid 12 transport and reactions can be altered by the presence of an immiscible phase. Against this backdrop, 13we present an investigation of the impact of initial saturation of an immiscible phase in the damaged 14 zone on the efficiency of wormhole generation and growth in acidizing operations. We present a 15 dimensionless two-phase reactive transport modelling tailored for studying the processes associated 16 with rock acidizing. For a case study of acid injection into calcite with random porosity and 17 permeability distribution, we show that an initial two-phase condition has positive feedback on the 18 generation of wormholes. The results, however, indicate that the relative magnitude of reduction in 19 the amount of pore volume of injected acid to produce effective wormholes depends on the mobility 20 ratio, so that a higher mobility ratio facilitates a faster wormhole generation process. Under the 21 conditions of modelling study presented, we demonstrate that in addition to the commonly used pair 22 of Péclet-Damköhler regime identification, the mobility ratio of the displacing/displaced fluids, the 23 * Corresponding author: Telephone +44 (0)161 306 4554,

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“…A new calcite disk was used for each experiment. And every calcite disk was soaked in 0.1N HCl for nearly 30 minutes, then rinsed with deionized water before fix them in the disk-holder assembly [14]. The gelled acid was poured into the reservoir vessel and heated to 30˚C -70˚C.…”

Section: The Rotating Disk Apparatusmentioning

confidence: 99%

Measurement of Reaction Rate of Gelled Acids and Calcite with the Rotating Disk Apparatus

Liao¹,

Zhang²,

Peng³

et al. 2017

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An investigation has been made to study the reaction kinetics of gelled acids with calcite using a rotating disk apparatus. The rheological experiments revealed that all gelled acids behaved as non-Newtonian shear thinning fluids. With the rotating disk apparatus, the reaction kinetics parameters, activation energy, and effective diffusion coefficients were determined. It was found that the reaction of gelled acid with calcite was mass transfer limited at low polymer concentration and moving toward surface reaction limited at higher polymer concentration. And the diffusion rate marginally decreased, with increasing the polymer concentration.

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The kinetics of calcite dissolution in acetic acid solutions

Cited by 194 publications

References 0 publications

Kinetics of calcite dissolution in CO2-saturated water at temperatures between (323 and 373) K and pressures up to 13.8 MPa

Kinetics of calcite dissolution in CO2-saturated water at temperatures between (323 and 373) K and pressures up to 13.8 MPa

Impact of phase saturation on wormhole formation in rock matrix acidizing

Measurement of Reaction Rate of Gelled Acids and Calcite with the Rotating Disk Apparatus

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