Summary of Research Project Results under JSPS FY2001
"Research for the Future Program"

1.Research Institution Tokyo Institute of Technology
2.Research Area Physical and Engineering Sciences
3.Research Field Innovation in Energy Generation, Conversion, Materials and Systems for the Future
4.Term of Project FY 1997 〜 FY 2001
5.Project Number 97P00903
6.Title of Project Study on Raising Quality of Fuels by Use of the Reactions under Super Critical Conditions and on Efficient Energy Transfer System

7.Project Leader
Name Institution,Department Title of Position
Hiroshi,Tomiyasu Tokyo Institute of Technology Emeritus Professor

8.Core Members

Names Institution,Department Title of Position
Yoshio, Yoshizawa Tokyo Institute of Technology, Research Laboratory for Nuclear Reactors Professor
Yasuhiko, Fujii Tokyo Institute of Technology, Research Laboratory for Nuclear Reactors Professor

9.Summary of Research Results

 The purpose of the present study is to establish methods for the reforming of low quality fuels and for the efficient energy conversion system through chemical reactions under supercritical conditions. In order to attain the purpose, the understanding of the physico-chemical properties of supercritical fluids is of particular importance, and the experiments have been carried out using vessels with sapphire windows to measure UV-visible, emission, and NMR spectra, and to measure Mach-Zehnder interferometer. Based on these basic studies, we have found that ruthenium(IV) dioxide acts as an enormous catalytic effect for the decomposition of any organic compounds in supercritical water. As a matter of fact, coal decomposed in supercritical water in the presence of the catalyst resulting in the formation of hydrogen gas as a major species with 20% of carbon dioxide. Although the mechanism has not been established yet, hydrogen seems to be generated from water during the decomposition of coal. Furthermore, the use of this catalyst enabled the complete decomposition of any plastics forming gas. The main species in the formed gas is methane, and about 40% of cabin dioxide and 5% of hydrogen are detected by gas-chromatographic measurements. In conclusion, the fuel reforming in the present study has been done successfully, and will be in progress for the industrial application. With respect to the efficient energy conversion system, we have established the basic data in supercritical water. The system seems to be feasible in the future.

10.Key Words

(1)supercritical water、(2)catalysis、(3)hydrogen generation
(4)plastic reprocessing、(5)NMR、(6)relaxation time
(7)interferometer、(8)energy conversion