Perviz Sayan, Sevgi Polat, Tuba Nur Özalp-Sendur

Effects of Amino Acids on Calcium Carbonate Crystallization

Investigation of Polymorphic Phase Transformation of Calcium Carbonate in the Presence of Different Additives

• Broschiertes Buch

Produktbeschreibung

The calcium carbonate (CaCO3) crystals were successfully synthesized in the presence of tryptophan, glutamic acid, and threonine used as the additives at 30 °C and at a pH of 8.5. The CaCO3 crystals were prepared and analyzed using XRD, FTIR, SEM, BET, AFM, and zeta potential analysis. Based on the characterization results, the shape of the CaCO3 crystals changed from smooth cubic calcite crystals to porous irregular spherical-like vaterite crystals with increasing tryptophan, glutamic acid, and threonine concentrations. Meanwhile, the kinetic results showed that the thermal degradation of CaCO3 followed the shrinkage geometrical spherical mechanism, R3 and the average activation energy was 224.6 kJ/mol. According to the results of the experimental design, the additive concentration was the most influential variable affecting the relative fraction of vaterite in the produced crystals. It can be concluded that tryptophan, glutamic acid, and threonine are important for better understanding and controlling the polymorph, size, and morphology of CaCO3 crystals.

Produktdetails

• Verlag: LAP Lambert Academic Publishing
• Seitenzahl: 88
• Erscheinungstermin: 23. Februar 2021
• Englisch
• Abmessung: 220mm x 150mm x 6mm
• Gewicht: 149g
• ISBN-13: 9786203462654
• ISBN-10: 6203462659
• Artikelnr.: 61380398

Autorenporträt

Perviz Sayan es profesor de Ingeniería Química en la Universidad de Mármara.Se interesa por las técnicas de separación, como la cristalización, el polimorfismo, la adsorción y la filtración.Sevgi Polat trabaja actualmente en la Universidad de Mármara, en Estambul.Tuba N. Özalpesestudiante de máster en Ingeniería Química en la Universidad de Mármara.