TITLE:
Physicochemical Characteristics of Mauritia arabica Shell with High Temperature Calcination
AUTHORS:
Di Zhang, Jiaxin Yao, Yingli Wang
KEYWORDS:
Mauritia arabica Shell, Calcined, Microstructure, Phase Change
JOURNAL NAME:
Advances in Biological Chemistry,
Vol.9 No.5,
October
29,
2019
ABSTRACT: Mauritia arabica shell (MAS), is widely applied as a Chinese tradition medicine after thermal
decomposition. However, it is still uncertain how the thermal decomposition
process affects the physicochemical properties of MAS. Moreover, the influences
of these properties on the bioavailability have not been well understood. In
this investigation, a temperature-programmed pyrolysis process is applied to
calcine MAS to achieve the desired MAS with different physicochemical
properties. The results showed that a weight loss of 43.27% - 44.73% was
detected after MAS was calcined at 900°C, which was mainly attributed to the
decomposition of protein, the phase transition of calcium carbonate from
aragonite to calcite, and the decomposition of calcium carbonate. The
activation energy in the heating duration was calculated by applying the
Kissinger-Akahira-Sunose model (KAS), which was 58.13 kJ/mol for crystalline
transformation and 181.27 kJ/mol for decomposition. Besides,according to the analyses from Fourier transform
infrared (FTIR) and X-ray powder diffraction (XRD) tests, the crystalline of
calcium carbonate in MAS was aragonite. These results provide beneficial
temperature parameters for the pretreatments of MAS for pharmaceutical usages.