The influence of calcination temperature on the physicochemical characteristics of Pteria martensii

• Published in: Journal of thermal analysis and calorimetry Vol. 131; no. 1; pp. 49 - 55
• Main Authors: Wang, Yingli, Zhang, Juanjuan
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 2018; Springer; Springer Nature B.V
• Subjects: Activation energy; Analytical Chemistry; Aragonite; Calcite; Calcite crystals; Calcium carbonate; Chemistry; Chemistry and Materials Science; Decomposition; Energy value; Fourier transforms; Infrared analysis; Infrared spectroscopy; Inorganic Chemistry; Measurement Science and Instrumentation; Phase transitions; Physical Chemistry; Polymer Sciences; Pyrolysis; Roasting; X-ray diffraction; Margaritifera concha; Calcination; Phase transition
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-017-6579-7

Through temperature-programmed pyrolysis, the physicochemical properties of Pteria martensii (PM) before and after calcination are investigated. Our results show that the mass loss is 11.02% from room temperature to 600 °C with an average mass loss rate of 0.19% per min. The decomposition of organics coupling with the phase transition of calcium carbonate from aragonite to calcite occurs in the range of 367.4–423.0 °C, as confirmed by X-ray diffraction and Fourier transform infrared spectroscopy analyses. The decomposition pores and channels are changed forming complex porous structures. The surface of sample shows a much rougher fracture, with higher C, O and N element concentrations. At the stage of decomposition and phase transition of organics, the average activation energy value is 118.78 kJ mol −1 . This study provides valuable information on the calcination process and calcined PM for use in medicines.