The sorption properties of native and modified petroleum asphaltenes with respect to phenol were studied under static conditions. The asphaltenes were modified by nitration, followed by reduction with sodium sulfide. Sorption isotherms of phenol were constructed on the basis of the obtained data, and equations for the adsorption processes were calculated. It was found that the adsorption isotherms can be described most accurately by the Freundlich and Langmuir equations. It was found that the process occurs as a result of physical adsorption.
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 5, pp. 23–27, September-October, 2021.
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Nagornova, O.A., Foss, L.E., Shabalin, K.V. et al. Adsorption of Phenol by Nitro and Amino Derivatives of Petroleum Asphaltenes. Chem Technol Fuels Oils 57, 758–763 (2021). https://doi.org/10.1007/s10553-021-01303-1
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DOI: https://doi.org/10.1007/s10553-021-01303-1