INIQUI 05448
INSTITUTO DE INVESTIGACIONES PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
artículos
Título:
SOLID DESICCANTS FROM NATURAL AND MODIFIED BENTONITES
Autor/es:
A MERCADO; N. P. CASTRILLO, A. MERCADO Y C. VOLZONE
Revista:
CERâMICA
Editorial:
Alpha
Referencias:
Lugar: São Paulo; Año: 2018 vol. 64 p. 526 - 537
ISSN:
0366-6913
Resumen:
The aim of the present work is to study Argentinean natural clays with different modifications and their use as desiccants. To this end, bentonite clays collected from different regions, were characterized, and modified by heat treatment and calcium addition, and the desiccant capacity, in the form of powder and pellets, was studied. In addition, the hydration degree reversibility of these materials was estimated.The mineralogical and structural characterization was performed by X-ray diffraction (XRD), infrared spectroscopy with Fourier transform (FTIR) and Differential thermal analyses (DTA) and thermogravimetric analyses (TGA). The textural characterization was performed by adsorption-desorption of N2, the chemical composition by X- ray fluorescence (FRX) and cation exchange capacity (CEC). The water adsorption (g H2O/g) was determined at 25 °C between 11- 98 % relative humidity (RH). The results indicated that the desiccant power has a close relationship with the clays degree of purity, the drying of the samples and the method of Calcium incorporation.
