Dissolution Kinetics of Phosphate Ore in SO2-Saturated Water

1994 ◽  
Vol 33 (9) ◽  
pp. 2220-2225 ◽  
Author(s):  
Ahmet Yartasi ◽  
M. Muhtar Kocakerim ◽  
Sinan Yapici ◽  
Cengiz Ozmetin
Keyword(s):  
Dissolution Kinetics ◽  
Phosphate Ore ◽  
Saturated Water ◽  
Kinetics Of

Dissolution kinetics of colemanite in SO2 saturated water

1988 ◽  
Vol 19 (3) ◽  
pp. 385-392 ◽  
Author(s):  
M.Muhtar Kocakerim ◽  
Mahir Alkan
Keyword(s):  
Dissolution Kinetics ◽  
Saturated Water ◽  
Kinetics Of

scholarly journals Kinetics of carbonate mineral dissolution in CO2-acidified brines at storage reservoir conditions

2016 ◽  
Vol 192 ◽  
pp. 545-560 ◽  
Author(s):  
Cheng Peng ◽  
Benaiah U. Anabaraonye ◽  
John P. Crawshaw ◽  
Geoffrey C. Maitland ◽  
J. P. Martin Trusler
Keyword(s):  
Kinetic Model ◽  
Carbonic Acid ◽  
Dissolution Kinetics ◽  
Carbonate Reservoir ◽  
Mineral Dissolution ◽  
Direct Reaction ◽  
Carbonate Mineral ◽  
Dissolution Rates ◽  
Saturated Water ◽  
Kinetics Of

We report experimental measurements of the dissolution rate of several carbonate minerals in CO2-saturated water or brine at temperatures between 323 K and 373 K and at pressures up to 15 MPa. The dissolution kinetics of pure calcite were studied in CO2-saturated NaCl brines with molalities of up to 5 mol kg−1. The results of these experiments were found to depend only weakly on the brine molality and to conform reasonably well with a kinetic model involving two parallel first-order reactions: one involving reactions with protons and the other involving reaction with carbonic acid. The dissolution rates of dolomite and magnesite were studied in both aqueous HCl solution and in CO2-saturated water. For these minerals, the dissolution rates could be explained by a simpler kinetic model involving only direct reaction between protons and the mineral surface. Finally, the rates of dissolution of two carbonate-reservoir analogue minerals (Ketton limestone and North-Sea chalk) in CO2-saturated water were found to follow the same kinetics as found for pure calcite. Vertical scanning interferometry was used to study the surface morphology of unreacted and reacted samples. The results of the present study may find application in reactive-flow simulations of CO2-injection into carbonate-mineral saline aquifers.

scholarly journals Dissolution of Tunisian phosphate ore by a mixture of sulfuric and phosphoric acid: Kinetics study by means of differential reaction calorimetry

2019 ◽  
Vol 55 (1) ◽  
pp. 9-19
Author(s):  
Olfa Lachkar-Zamouri ◽  
Khemaies Brahim ◽  
Faten Bennour ◽  
Ismail Khattech
Keyword(s):  
Experimental Data ◽  
Particle Size ◽  
Dissolution Rate ◽  
Dissolution Kinetics ◽  
Reaction Model ◽  
Reaction Calorimetry ◽  
Phosphate Ore ◽  
Differential Reaction ◽  
Apparent Activation Energies ◽  
Kinetics Of

A mixture of phosphoric and sulfuric acid was used to investigate the dissolution kinetics of phosphate ore by Differential Reaction Calorimetry (DRC). The effect of the solid-to-iquid ratio, concentration, stirring speed, particle size and temperature of the reaction is examined. It was established that the dissolution rate increased with stirring speed and particle size. However, rising the olid-to-iquid ratio, temperature and concentration decreased the dissolution rate. It was determined that the dissolution rate fits in the first order of the pseudo-homogeneous reaction model. Two negative values of apparent activation energies were found in the range of 25 to 60?C. The experimental data were tested by graphical and statistical methods and it was found that the following models were best fitted for the experimental data and an empirical equation for the process was developed. -ln (1 ? x) = [2,2 E-09((S/L)0.75C -0.461G0.447(SS) 0.471exp (2671/T)]t. T? 40?C -ln (1 ? x) = [2,2 E-09((S/L)0.75C -0.461G0.447(SS) 0.471exp (6959/T)]t. T > 45?C

Dissolution Kinetics of Ulexite in CO2-Saturated Water

1993 ◽  
Vol 32 (4) ◽  
pp. 393-396 ◽  
Author(s):  
M. Muhtar Kocakerim ◽  
Sabri Çolak ◽  
Tom Davies ◽  
Mahir Alkan
Keyword(s):  
Dissolution Kinetics ◽  
Saturated Water ◽  
Kinetics Of

Dissolution Kinetics of Ulexite in CO2-Saturated Water

1993 ◽  
Vol 32 (4) ◽  
pp. 393-396 ◽  
Author(s):  
M. Muhtar Kocakerim ◽  
Sabri Çolak ◽  
Tom Davies ◽  
Mahir Alkan
Keyword(s):  
Dissolution Kinetics ◽  
Saturated Water ◽  
Kinetics Of

Dissolution Kinetics of Phosphate Ore in H2SO4Solutions

2003 ◽  
Vol 42 (10) ◽  
pp. 2052-2057 ◽  
Author(s):  
F. Sevim ◽  
H. Saraç ◽  
M. M. Kocakerim ◽  
A. Yartaşı
Keyword(s):  
Dissolution Kinetics ◽  
Phosphate Ore ◽  
Kinetics Of

Dissolution kinetics of some borate minerals in CO2-saturated water

1991 ◽  
Vol 26 (2) ◽  
pp. 255-262 ◽  
Author(s):  
Mahir Alkan ◽  
Münir Oktay ◽  
M.Muhtar Kocakerim ◽  
Zafer Karagölge
Keyword(s):  
Dissolution Kinetics ◽  
Saturated Water ◽  
Borate Minerals ◽  
Kinetics Of
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