Kinetics of Calcium Carbonate Neutralization

Notari, Robert E.; Sokoloski, Theodore D.

doi:10.1002/jps.2600541021

Cited by 11 publications

(9 citation statements)

References 8 publications

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“…The dissolution of calcite (CaCa) in acids is of interest to many fields of science, and the equilibrium relationships in the calcite-carbonic acid-water system have been studied extensively [ 11. The dissolution rate of calcite in acids has been measured for such puposes as the formulation of antacids [2,3], the study of secondary changes in sedimentary deposits [4,5,6], the pH of sea water [7-91, the neutralization of pickling acid [ 10,111, the neutralization of acid mine drainage [12] and the acidizing of petroleum wellsI13, 141.…”

mentioning

confidence: 99%

Acidization—II. The dissolution of calcite in hydrochloric acid

Lund

Fogler

McCune

et al. 1975

Chemical Engineering Science

292

125

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The dissolution of calcite in hydrochloric acid was studied with the aid of a rotating disk system at 800 psig in the temperature range-156-25°C. At 25°C the dissolution process is mass transfer limited even at high disk rotation speeds whereas at-156°C both mass transfer and surface reaction rates limit the dissolution rate. The multicomponent coupled ionic diffusive fluxes of reactants and products were defined by using the gradient of the electrochemical potentials as driving forces for the diffusion. The activity coefficients used in calculating the multicomponent diffusivities of the diffusing species were estimated by Hamed's rule. The concentration protiles of the ions in the boundary layer were then determined by numerically integrating the system of coupled convective diffusion equations. The effects of variable density, viscosity, and high mass fluxes on the fluid velocity in the boundary layer were taken into account. The rate of the surface reaction was found to be proportional to the 0.63 power of the surface hydrochloric acid concentration. Analysis of the experiments suggests that the absorption of hydrogen ion (described by a Freundlich adsorption isotherm) on the solid calcite surface and subsequent reaction of the adsorbed hydrogen ion with the solid calcite matrix is the reaction mechanism. lNTRODUC'IlON

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confidence: 99%

Acidization—II. The dissolution of calcite in hydrochloric acid

Lund

Fogler

McCune

et al. 1975

Chemical Engineering Science

292

125

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“…As the specic surface areas of CCNPs (11.95 AE 0.03 m 2 g À1 ) were larger to CCMPs (3.51 AE 0.02 m 2 g À1 ), the FA neutralization reaction was faster. [21][22][23]…”

Section: Formation Of Cac 4 H 2 O 4 and Reaction Timementioning

confidence: 99%

“…There has been no prior study in this sense but studies have been carried out on the advantages of using small sized CC in acid neutralizing kinetic studies. [21][22][23] Apart from the CC associated bottlenecks of FA production, the fermentation products CaC 4 H 2 O 4 needs attention for easy recovery of FA. Conventionally, CaC 4 H 2 O 4 in broth is simultaneously heated (around at 80 C) and acidied (mineral acids such as HCl or H 2 SO 4 ) that release FA from CaC 4 H 2 O 4 and also increases the solubility of FA in the broth.…”

Section: Introductionmentioning

confidence: 99%

Application of calcium carbonate nanoparticles and microwave irradiation in submerged fermentation production and recovery of fumaric acid: a novel approach

Das

Brar

Verma³

2016

RSC Adv.

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“…The general equation (see [11][12][13]) that describes the evolution of the H + ions concentration reacting with the neutralizing calcium carbonate is given by 1…”

Section: The General Mathematical Modelmentioning

confidence: 99%

“…), so that for some particular geometries this can be easily inferred. Moreover also the rate k * can be a function of c * , but within reasonable variations of c * it can be considered constant (see [12,13]). The constant k * represents the rate at which the reaction occurs, giving a measure of how fast H + ions are neutralized by CaCO 3 .…”

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confidence: 99%