Ultrafiltration purification of waste motor oil using tubular polymer membranes

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Abstract

This paper considers the process of waste motor oil (WMO) purification using tubular polymer micro- and ultrafiltration membranes based on fluoroplastic with an average pore size of 0.5 and 0.05 μm with varying separation modes: transmembrane pressure of 0.2–0.5 MPa, temperature of the separated medium of 313–353 K. It is shown that the ultrafiltration membrane has a higher retention capacity for asphalt-resinous degradation products compared to the microfiltration membrane. Thus, the kinematic viscosity coefficient in the permeate after the UFFK membrane decreased from 10.84 to 4.76 mm2/s, and after the MFFK membrane - from 10.84 to 7.9 mm2/s. The highest efficiency of the purification process was achieved by the ultrafiltration method at a transmembrane pressure of 0.3–0.4 MPa and a temperature of 343–353 K. Analysis of the IR spectra of the original waste oil and permeate showed that membrane filtration allows for the effective removal of oxidation products from WMO without changing its hydrocarbon composition, which confirms the potential of this technology for the regeneration of waste oils.

About the authors

A. V. Markelov

Yaroslavl State Technical University

Email: aleksandr203.37@mail.ru
Yaroslavl, 150023 Russia

A. P. Nebesskaya

A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences

Moscow, 119071 Russia

A. V. Balynin

A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences

Moscow, 119071 Russia

V. V. Volkov

A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences

Moscow, 119071 Russia

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