Disposal of oil sludge with the use of liquid and supercritical fluid extraction processes with propane-butane extractant

Abstract

The paper represents the results of implementation of liquid and supercritical fluid extraction processes for the purpose of extraction of oil-products from oil sludge. A mixture consisting of propane (75 wt%) and butane (25 wt%) has been applied as the extractant. The extraction processes have been conducted in a temperature range of 85-160°C and pressure range of 5-20 MPa.

Supercritical Fluid Application in the Oil and Gas Industry: A Comprehensive Review

“…Concerning the supercritical extraction of oil sludge, studies are mainly carried out using carbon dioxide. However, as the authors of [92] note, the propane-butane mixture also has a high solvent capacity for petroleum products. As an extractant, the authors used a propane-butane mixture containing 75 wt.% of propane and 25 wt.% of butane.…”

Thermodynamic modeling of microalgae oil extraction using supercritical fluids

“…Microalgae only need a liquid medium, some nutrients and sunlight to stimulate the growth of biomass [9], which makes feasible the use of land not suitable for cultivation of human and animal food products for the assembly of these. Among the different methods used for the oil extraction is found the supercritical fluids (SFE) technology, which emerges as an alternative to the traditional use of large quantities of toxic solvents, as well as the handling of short extraction times, high selectivity, economic efficiency and profitability [10,11]. A fluid is called supercritical when it is forced to remain at pressure and temperature conditions above its critical conditions.…”