engleski

Analytical development in FTIR analysis of clay minerals

In the oil industry clay minerals play a fundamental role due to their swelling, porosity reducing and cation exchange properties which are all crucial factors in reservoir handling. The different Fourier Transform Infrared methods (‘classic’ FTIR spectrometry with KBr-pellets and ATR-FTIR – Attenuated Total Reflectance) with non-polarized source may provide cost-efficient and rapid, valuable information not only on the identification of clay minerals, but also on the varying adsorbed and interlayer water content of clay minerals with changing environmental conditions. Our summary gives an overview about developing a new infrared analytical routine for clay minerals in addition or, as an alternative to traditional analytical techniques (such as XRD − X-ray powder diffraction, SEM – scanning electron microscopy, etc.). The combination of these techniques, as we shall demonstrate, may suite better the need of the oil industry. In the oil industry the ATR-FTIR spectra of minerals could serve as an important supplement to the data provided by XRD, SEM and other methods.

Clays, clay minerals, FTIR spectrometry, infrared spectra, heating protocol

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