Publication Details (including relevant citation information):
Pet. Sci. Tech. (Accepted)
Raw magnesite is slightly porous but it becomes highly porous at above 500oC. Its adsorption characteristics during percolation of solvent extracted used lubricating oil were investigated using surface area determination, supported by scanning electron microscopy, elemental analyses, thermal gravimetric analyses, X-ray diffraction patterns. Adsorption capability was studied for various activation temperatures, times and particle sizes. Maximum adsorption capacity was found for 100-230 mesh magnesite particles activated at 500oC for 2 hours. This has produced low color index re-refined oil. One of the economical features is the reproducibility of the results after regeneration of the spent magnesite samples. An excellent feature of the adsorbent is the efficient removal capability aromatica especially PAH, established carcinogens, which is supported by UV and FTIR studies of oils at various stages of re-refining.
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