Basic Characteristics and Application Progress of Supercritical Water

Abstract

Compared with water at normal temperature and normal pressure, supercritical water had large differences and also had some unique characteristics. In this paper, some basic physical properties of supercritical water, included density, viscosity, thermal conductivity, dielectric constant, ion product, hydrogen bond, diffusion coefficient and solubility, were introduced. Some applications of supercritical water oxidation technology in waste treatment, hydrogen production by supercritical water gasification of coal and supercritical hydr thermal synthesis, were discussed.