Physicochemical study on supercritical fluids and their industrial use

H. Tomiyasu, S. Y. Kim, T. Tsukahara, M. Harada

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


In this study, we confirm a tetrahedral structure for a Co2+ complex in supercritical water instead of the octahedral structure in normal water. The absorption spectra of Ru2+ complexes were observed for only stable species such as [Ru(phen)3]2+ in supercritical water. The photochemistry of uranyl(VI)-tributylphosphate(TBP) complex in supercritical carbon dioxide (scCO2) was studied in the pressure range of 8-40 MPa and from 289 to 336K. In order to examine the hydrogen-bond structures and molecular motions of supercritical water and non-aqueous solvents, their 1H spin-lattice relaxation times were measured under sub- and supercritical conditions by using high-pressure NMR. NiMo/Al2O3 was chosen as a catalyst because of its catalytic activity for hydrocracking aromatic structures.

Original languageEnglish
Pages (from-to)411-416
Number of pages6
JournalProgress in Nuclear Energy
Issue number1-4
Publication statusPublished - 2000
Event3rd International Symposium on GlobaL Environment and Nuclear Energy Systems Centennial Memorial Hall (GENES-3) - Tokyo, Jpn
Duration: 1999 Dec 141999 Dec 17


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