Dissolution kinetics of borogypsum in di-ammonium hydrogen phosphate solutions

Şimşek, Havva Mumcu; Guliyev, Rövşen; Beşe, Ayşe Vildan

doi:10.1016/j.ijhydene.2018.07.089

Cited by 9 publications

(5 citation statements)

References 33 publications

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“…dissolution percentages versus time is given in Figure 5. Since the kinetic energies of the molecules increase exponentially with the increase in temperature, it increases the collision rate of the molecules per unit of time [2,23,25,26]. For this reason, it is seen in Figure 5 that the increase in the reaction rate and the amount of Ca 2+ passing into the solution in the aqueous medium with the increase in temperature.…”

Section: Reactionsmentioning

confidence: 99%

“…Although there are more than 200 boron compounds in nature, only a few of them have the opportunity to be used commercially and industrially [4]. In terms of the amount of reserves in Türkiye, tincal (Na 2 O 2 B 2 O 3 10H 2 O), colemanite (Ca 2 B 6 O 11 5H 2 O) and ulexite (Na 2 O 2 CaO 5 B 2 O 3 16H 2 O) minerals are widely found [5][6][7]. Although boron is a nonmetal in group IIIA, it sometimes shows metallic properties [8].…”

Section: Introductionmentioning

confidence: 99%

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Dissolution behavior and kinetic investigation of 〖Ca〗^(2+) in the dissolution of colemanite in propionic acid presence saturated with synthetic flue gas

Uğur

2024

Journal of Boron

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Colemanite (〖2CaO.3B〗_2 O_3.5H_2 O) is a calcium borate mineral and can be expressed as the primary material of industrial production of boric acid. Boric acid is one of the most essential raw materials obtained by solving colemanite ore in acidic solutions and gases. The dissolution behavior and kinetics of 〖Ca〗^(2+) in a solution of colemanite in a propionic acid solution saturated with synthetic flue gas were examined. In this context; the effects of particle size, reaction temperature, acid concentration, solid-liquid ratio and synthetic flue gas flow rate parameters were investigated. According to the experimental data, it was observed that the amount of 〖Ca〗^(2+) passing to the solution increased with the increase of the reaction temperature, acid concentration and gas flow rate, and with the decrease in solid-liquid ratio and grain size. Experimental results were analyzed by homogeneous and heterogeneous models using the Statistica package program, and it was determined that the dissolution of 〖Ca〗^(2+) in solution complies with the “Avrami” model. The activation energy (E) was found as 〖26.83 kJ.mol〗^(-1) and the Arrhenius constant (A) was found as 〖8.9*10〗^3.

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Section: Reactionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dissolution behavior and kinetic investigation of 〖Ca〗^(2+) in the dissolution of colemanite in propionic acid presence saturated with synthetic flue gas

Uğur

2024

Journal of Boron

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“…Protecting the environment from industrial wastes is very important for living creatures because the health of all living things and their environment are adversely affected by this waste and pollution. For this purpose, many scientists continue to explore alternative ways to recycle waste, protect living creatures and the environment, and limit the consumption of natural resources [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Since the gypsum sludge contains about 3-6 % B 2 O 3 , it is called borogypsum (BG). Approximately 3.3×10 5 tons per year of boric acid and 6.5-7×10 5 tons per year of BG are produced in the factories located in Bandırma and Emet of Etimaden Inc. in Turkiye [4,11]. BG discarded from the plant is stored in open areas.…”

Section: Introductionmentioning

confidence: 99%

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Utilization potential of borogypsum and silica fume in producing lightweight building material

Öztürk

Evcin

2022

Journal of Boron

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The present study is aimed at investigating the utilization of two crucial industrial wastes, borogypsum and silica fume, as the main raw materials in the production of building materials. For this aim, different receipts were designed from boron waste (borogypsum) belonging to Emet Boric Acid factory (Kütahya/Turkey) and silica fume, which was taken from Electrometallurgy facilities (Antalya/Turkey). Mixtures were prepared so that the amount of waste material used in the composition was 90%, and the remaining 10% was binder clay. The samples were prepared with different proportions of both wastes were pressed uniaxially at 10 MPa, and the shaped samples were then fired at 1000, 1050, 1100, and 1150 °C. Physical and mechanical tests, as well as mineralogical and microstructural analyses, were carried out on the fired samples. The technical properties of the samples derived from the wastes were evaluated depending on the type of waste material and its usage amounts, and firing temperatures. It has been understood that the use of high Borogypsum will cause high firing loss, which will negatively affect the dimensional stability of the material. Moreover, with silica fume addition to borogypsum, the water absorption and porosity values increased, and the strength values decreased accordingly. Consequently, the water absorption and bending strength values obtained in the samples prepared from a mixture of 70% borogypsum and 20% silica fume can be considered the usage as a wall tile is possible since they coincide with the technical properties defined in the EN ISO 10545-3 and EN ISO 10545-4 standards, respectively.

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А kinеtiс аnаlysis fоr prоduсtiоn of саlсium bоrоgluсоnаtе frоm colemanite

Demir

Al‐Ani

Laçin

2020

Int J of Chemical Kinetics

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In this paper, the kinetic model of colemanite dissolution in gluconic acid solutions was carried out in a batch reactor. The effects of the particle size, reaction temperature, stirring speed, gluconic acid concentration, and solid/liquid ratio on colemanite dissolution were experimentally studied. The empirical parameters were the gluconic acid concentration (0.05-0.2 M), the temperature (20-50 • C), the solid/liquid ratio (0.05/500-1.5/500 g⋅L −1), particle size (193.5-1000 μm), and stirring speed (400-700 rpm). The kinetic models for heterogeneous solid-liquid reactions were used with the dissolution data in evaluating the kinetic. The dissolution of colemanite in gluconic acid solutions was controlled by diffusion through the product layer. The activation energy was found to be 8.39 kJ⋅mol −1. The rate expression associated with the dissolution rate of colemanite depending on the parameters chosen may be summarized as follows: 1 − 3(1 −) 2∕3 + 2(1 −) = 1.2 −8.39∕ .

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Dissolution kinetics of borogypsum in di-ammonium hydrogen phosphate solutions

Cited by 9 publications

References 33 publications

Dissolution behavior and kinetic investigation of 〖Ca〗^(2+) in the dissolution of colemanite in propionic acid presence saturated with synthetic flue gas

Dissolution behavior and kinetic investigation of 〖Ca〗^(2+) in the dissolution of colemanite in propionic acid presence saturated with synthetic flue gas

Utilization potential of borogypsum and silica fume in producing lightweight building material

А kinеtiс аnаlysis fоr prоduсtiоn of саlсium bоrоgluсоnаtе frоm colemanite

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