Prediction of the formation of low-molecular components, particles, and condensed phases during thermal destruction of oil-contaminated soil

Authors : Umirzak DZHUSİPBEKOV, Dametken FİSCHER, Gulzipa NURGALİEVA, Kubat KEMELOV, Damira SAMBAEVA, Zarlık MAYMEKOV

Pages : 53-63

Doi:10.51354/mjen.1211527

View : 35 | Download : 43

Publication Date : 2023-07-01

Article Type : Research Paper

Abstract :In this study, thermodynamic modelling of the process of thermal destruction of oil-contaminated soil of Ozenmunaigas JSC, which includes compounds such as carbon, silicon, aluminum, iron, calcium, magnesium, sodium, potassium, chromium, phosphorus, manganese, copper, titanium, molybdenum, nickel, vanadium, and water, was carried out. The physicochemical and thermodynamic parameters of the complex system were calculated at P=0.1 MPa, T=598-3000 K. The concentration distribution of components, particles, and condensed phases in the gas phase has been established. In the process of thermal destruction of oil-contaminated soil, the formation of condensed phases was as follows: SiO2insert ignore into journalissuearticles values(c);, Al2O3insert ignore into journalissuearticles values(c);, AlO3H3insert ignore into journalissuearticles values(c);, Cuinsert ignore into journalissuearticles values(c);, Cu2Oinsert ignore into journalissuearticles values(c);, FeOinsert ignore into journalissuearticles values(c);, Fe2O3insert ignore into journalissuearticles values(c);, Fe3O4insert ignore into journalissuearticles values(c);, Fe2SiO4insert ignore into journalissuearticles values(c);, NiOinsert ignore into journalissuearticles values(c);, MnOinsert ignore into journalissuearticles values(c);, Mn3O4insert ignore into journalissuearticles values(c);, MnO2H2insert ignore into journalissuearticles values(c);, Cr2O3insert ignore into journalissuearticles values(c);, MoO2insert ignore into journalissuearticles values(c);, V2O3insert ignore into journalissuearticles values(c);, V2O4insert ignore into journalissuearticles values(c);, TiO2insert ignore into journalissuearticles values(c);, MgSiO3insert ignore into journalissuearticles values(c);, Mg2SiO4insert ignore into journalissuearticles values(c);, MgTi2O5insert ignore into journalissuearticles values(c);, Ca3P2O8insert ignore into journalissuearticles values(c);, Mg2SiO4insert ignore into journalissuearticles values(c);, MgTi2O5insert ignore into journalissuearticles values(c);, Ca3P2O8insert ignore into journalissuearticles values(c);, CaCO3insert ignore into journalissuearticles values(c);, CaSiO3insert ignore into journalissuearticles values(c);, CaTiO3insert ignore into journalissuearticles values(c);, Na2Si2O5insert ignore into journalissuearticles values(c);, K2Si4O9insert ignore into journalissuearticles values(c);. At the same time, the amount of condensed calcium silicate CaSiO3insert ignore into journalissuearticles values(c); was significant and amounted to 3.2 mol/kg, which is due to the initial standard content of oxides of the type insert ignore into journalissuearticles values(g/kg);: SiO2-473,7, CaO-181,5 in oil-contaminated soil. The formation of various types of condensed phases insert ignore into journalissuearticles values(from 10-30 to 10-4 mol/kg); during thermal degradation can help reduce the synergism and toxicity of metal particles in oil-contaminated soils. In the process of thermal destruction of oil-contaminated soil, its carbon-containing components insert ignore into journalissuearticles values(mg/kg: С12-6,27; С13-10,98; С14-15,69; С15-18,82; С16-23,52; С17-31,37; С18-27,80; С19-17,25; С20-29,80); were mainly converted into oxide, carbon dioxide, and water, and thereby neutralized the organic mass of the soil.
Keywords : oil, soil, carbon, metal, chemical composition, component, particle, thermodynamics, modeling, condensed phase, neutralization