The following are listed.
Some examples of sub/supercritical water treatment
| Particle synthesis | a) Hydrothermal synthesis of metal oxide: See Q9 Barium titanate BaTiO₃, zirconia ZrO₂, cerium oxide CeO₃, optical materials (TiO₂, ZnO, ITO), etc. b) Organic modification on the surface of inorganic particles: see Q10 Oleic acid-modified cobalt blue nanoparticles, thermal conductive filler |
| Recycle | a) Chemical recycling of organic polymers: Converts dehydration condensation compounds into monomers. See Q11. b) Others: Recycling of wood resources. See Q11 Conversion of fuels such as chlorinated solvents, recovery of carbon fibers from CFRP, etc. |
| Decomposition | a) Supercritical hydroxyl decomposition: Decomposes hazardous organic chlorine compounds such as PCBs and dioxins with oxygen. b) Lightening: Pipeline fluid transportation by lightening high-viscosity oil sands, extra-heavy oil, etc. See Q12. c) Gasification: Conversion from biomass/organic waste to fuel gas, etc. |
Zirconia nanoparticles ZrO₂: Fine particle powder with a primary particle size of 10 nm or less. The main crystal structure is tetragonal. Spherical particles with a secondary particle size of 19 nm
Oleic acid-modified cobalt blue nanoparticles CoAl₂O₄: It has been reported that the surface is covered with organic molecules, so it has a high affinity with organic materials and mixes uniformly with polymers. (20200413 accessed at https://www.wpi-aimr.tohoku.ac.jp/ajiri_labo/research/research_002.html)