MODIFICATION OF LOCAL BENTONITE AND EVALUATION OF ITS ADSORPTIVE PROPERTIES IN KEROSENE PURIFICATION
Authors
Qobilov Shokir Juraqulovich, Olimov Bobir Bahodirovich, Akhmedov Vokhid Nizomovich
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in this study, a two-step phosphate–ammonium modification procedure was developed using phosphoric acid (H3PO4) and ammonium phosphate ((NH4)3PO4) to convert locally sourced Navbahor bentonites into an efficient adsorbent for kerosene purification. The modification process induced notable structural alterations, including enlargement of the interlayer spacing, surface activation, partial delamination, and the formation of new acidic functional groups. FTIR, XRD, and adsorption analyses confirmed substantial improvements in bentonite performance: the surface area increased from 69.5 to 155.8 m2/g, while the pore volume expanded from 0.116 to 0.325 cm3/g; additionally, the emergence of P–O–Si and P–O–Al linkages was identified. Adsorption experiments demonstrated purification efficiencies of up to 74.2% for color-causing compounds, 68.3% for aromatics, and 72.7% for sulfur-containing species in kerosene. Overall, the phosphate–ammonium–modified bentonite represents a cost-effective, high-performance, and locally sourced adsorbent suitable for industrial-scale improvement of kerosene quality.
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Authors
Qobilov Shokir Juraqulovich, Olimov Bobir Bahodirovich, Akhmedov Vokhid Nizomovich
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References:
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