Applications of High Temperature and High Pressure Water Reaction as Resource Recovery Technique

Nobuaki Sato*, Hiroyuki Daimon* and Koichi Fujie*
* Department of Ecological Engineering, Toyohashi University of Technology
+ Correspondence should be addressed to Hiroyuki Daimon:
(1-1 Hibarigaoka, Tempaku-cho, Toyohashi-city, Aichi 441-8580 Japan)

Abstract
High-temperature and high-pressure water reaction has been gaining attention as one of the techniques for recycling wastes. It has been applied to various kinds of waste such as plastics, residue from chemical plants, etc. In most cases, reaction of waste would result to decomposition of high molecular compounds to a low molecular one. These series of reactions are generally called consecutive reactions. Basically, the desired products are intermediate products of these reactions. Thus, proper control of reaction parameters to enhance decomposition of high molecular compounds and to suppress decomposition of target products, is required.
Future topics would clarify the influence of high temperature and high pressure water reaction conditions on a reaction pathway and the rate of organic compounds.

Key words: supercritical water, sub-critical water, waste, resource recovery, hydrolysis