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The present article aims to optimize the decarbonization of Timahdit oil shale layer Y by removing carbonates from the raw rock using acetic acid. The response surface methodology â€œcentral compositeÂ design (CCD)â€ has been used as a method of optimization to study the 3 factors of the process. The factors studied are the concentration of the acid, the processing time, and the ratio (liquid/solid). The optimal conditions with 68.17% of residue rate are obtained with 2 mol/l as concentration, 120 min as a time of treatment and 10.02 for the ratio. The raw (Y) and optimized materials (YO) were characterized by Scanning Electron MicroscopyÂ (SEM), X-ray fluorescence (XRF) and X-rayÂ diffractionÂ (XRD). The results showed that the acetic acid used to remove carbonates affects the chemical composition and the texture evolution of the residues.

Applying Response Surface Methodology to optimize the decarbonization process of Timahdit oil shale