Investigation of the dissolution kinetics and mechanism of calcined dolomite in propionic acid solutionsMehmet Ali Boz, Muhammed Bora Akin, and Mehmet Muhtar Kocakerim Department of Chemical Engineering, Çankırı Karatekin University, Çankırı, Turkey
E-mail: mboraakin@gmail.com Received: 3 March 2025 Accepted: 28 April 2025 Abstract: Dolomite is a widely available mineral used in various industries, particularly in iron-steel and glass production. This study investigates the dissolution kinetics of calcined dolomite ore in propionic acid (PA) solutions. The effects of PA concentration, solid–liquid ratio, stirring speed, particle size, and reaction temperature were examined. The results showed that increasing the PA concentration and temperature, as well as decreasing the particle size and solid/liquid ratio, enhanced the dissolution rate. However, stirring speed had no significant effect on dissolution. In all experiments, CaO was found to dissolve faster than MgO. Statistical analysis and graphical data confirmed that the reaction kinetics follow a first-order pseudo-homogeneous model. The activation energy (EA) and Arrhenius constant (A) were determined as 40,497 J·mol-1 and 1.1·10–4, respectively. Calcium propionate is commonly used in the food industry, particularly in bakery products, to prevent the growth of mold, fungi, and other microorganisms. This study examined the dissolution kinetics of calcined dolomite, which is the initial step in obtaining calcium propionate from dolomite ore, and identified the optimal conditions for dissolution. Keywords: Biomineralization; Calcium-based cement; Mineralogy; Mineral Trioxide Aggregate; Non-photochemical quenching; Process Chemistry; Dolomite; Propionic acid; Dissolution kinetics; Heterogeneous reaction; Activation energy Full paper is available at www.springerlink.com. DOI: 10.1007/s11696-025-04098-1
Chemical Papers 79 (7) 4763–4779 (2025) |
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