Evaluation and Prediction on the Effect of Ionic Properties of Solvent Extraction Performance of Oily Sludge Using Machine Learning

Abstract

Oily sludge produced in the process of petroleum exploitation and utilization is a kind of hazardous waste that needs to be urgently dealt with in the petrochemical industry. The oil content of oily sludge is generally between 15–50% and has a great potential for oil resource utilization. However, its composition is complex, in which asphaltene is of high viscosity and difficult to separate. In this study, The oily sludge was extracted with toluene as solvent, supplemented by three kinds of ionic liquids (1-ethyl-3-methylimidazole tetrafluoroborate ([EMIM] [BF4]), 1-ethyl-3-methylimidazole trifluoro-acetate ([EMIM] [TA]), 1-ethyl-3-methylimidazole Dicyandiamide ([EMIM] [N(CN)2])) and three kinds of deep eutectic solutions (choline chloride/urea (ChCl/U), choline chloride / ethylene glycol (ChCl/EG), and choline chloride/malonic acid (ChCl/MA)). This experiment investigates the effect of physicochemical properties of the solvents on oil recovery and three machine learning methods (ridge regression, multilayer perceptron, and support vector regression) are used to predict the association between them. Depending on the linear correlation of variables, it is found that the conductivity of ionic liquid is the key characteristic affecting the extraction treatment in this system.

Deep Eutectic Solvents and Asphaltenes in Oil Operations: Current Status and Future Prospective toward Sustainable Processes

“…These studies addressed the use of DESs in different activities in the upstream oil industry, such as desulfurization, 65,68 EOR, 57,73,74,76 inhibition of asphaltene precipitation, 66,72,73,77 alteration of the wettability of rocks, 53 separation by microemulsion, 69 improvement of heavy residual fuel oil, 75 extraction of phenolic compounds 71 and even cleaning of contaminated areas. 64 These findings corroborate the literature, affirming the versatility and potential applicability of DESs in different technological processes.…”

Efficient Treatment of Oily Sludge via Fast Microwave-Assisted Pyrolysis, Followed by Thermal Plasma Vitrification

“…Currently, the main methods for oily sludge treatment include landfilling, demulsification [ 4 ], solvent extraction [ 5 ], biodegradation [ 6 ], incineration [ 7 ], and pyrolysis [ 8 ]. Landfilling occupies much land and treats the oily sludge inefficiently, since it does not recover oil resources, and it easily causes secondary pollution.…”