Fundamental consideration about resource conversion by high pressure fluids focusing on hydrothermal or ionic liquid processes

Research output: Contribution to journalArticlepeer-review

Abstract

In our research group, resource conversion processes in high pressure solutions focusing on hydrothermal or ionic liquid as reaction and separation fields have been discussed. Specifically, we have examined kinetic study about enhancement of functionality and addition of higher value by breaking into low molecular weight materials from biomass using high pressure and high temperature water as solvent. For hydrothermal systems, our research groups have studied active control for pH in solutions as reaction controlling factors and utilization of solid acid/base. Additionally, development of recycling technique of positive-electrode material in lithium-ion batteries using function of organic acid in hydrothermal fields. For ionic liquid systems, our research group have studied extraction of reaction products and viscosity reduction effect for ionic liquid solution by adding CO2. Recently, physical properties of mixed ionic liquid systems which contain two or more ionic liquids have been measured and predicting method for them have been assessed. In this review, the results focusing on our research are overviewed, current research trends are introduced, and perspectives are discussed.

Original languageEnglish
Pages (from-to)206-216
Number of pages11
JournalReview of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu
Volume29
Issue number3
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • Biomass
  • Equation of state
  • Heavy oil
  • Hydrothermal
  • Ionic liquid
  • Lithium-ion battery
  • Physical properties
  • Solid acid-base

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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