Abstract
Polycyclic aromatic hydrocarbons (PAHs) are typical chemical pollutants from coal or organic matters. The solubility and conversion of PAHs in water phase are the prerequisite of complete gasification of organic matter or coal and the rate-determining step. This paper is supposed to provide a theoretical basis of restraining coking for ensuring efficient gasification. In this work, molecular dynamics (MD) simulation investigations focused on dissolution of macromolecules including PAHs were summarized and relevant problems were outlined. MD simulations on the solubility of PAH mixtures in supercritical water were carried out for the purpose of illuminating the behaviors of oil droplets containing PAHs under the extreme hydrothermal circumstances. Water densities were ranging from 0.1 g/cm3 to 0.3 g/cm3 in this study. The calculation results indicated that the solubility of light PAHs such as naphthalene was complete and thorough in supercritical water, while heavy PAHs such as benzo[ghi]perylene were sensitive to the thermodynamic state of water solvent. As for PAHs mixtures, light PAHs were inclined to be dissolved, while heavy PAHs were more likely to form PAH aggregates. Furthermore, effects of pressure on solubility were not significant. The increase in temperature and density was primarily beneficial to enhance the solubility of PAH mixtures in supercritical water.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
