Design of an optical cell for pulse radiolysis of supercritical water

2000 ◽  
Vol 71 (9) ◽  
pp. 3345-3350 ◽  
Author(s):  
Kenji Takahashi ◽  
Jason A. Cline ◽  
David M. Bartels ◽  
Charles D. Jonah
Keyword(s):  
Supercritical Water ◽  
Pulse Radiolysis ◽  
Optical Cell

Pulse Radiolysis of Supercritical Water. 3. Spectrum and Thermodynamics of the Hydrated Electron

2005 ◽  
Vol 109 (7) ◽  
pp. 1299-1307 ◽  
Author(s):  
David M. Bartels ◽  
Kenji Takahashi ◽  
Jason A. Cline ◽  
Timothy W. Marin ◽  
Charles D. Jonah
Keyword(s):  
Supercritical Water ◽  
Pulse Radiolysis ◽  
Hydrated Electron

On the Local Environment Surrounding Pyrene in Near- and Supercritical Water

1997 ◽  
Vol 51 (10) ◽  
pp. 1547-1553 ◽  
Author(s):  
Emily D. Niemeyer ◽  
Richard A. Dunbar ◽  
Frank V. Bright
Keyword(s):  
Supercritical Water ◽  
Critical Density ◽  
Local Environment ◽  
Time Resolved Fluorescence ◽  
Decay Kinetics ◽  
Optical Cell ◽  
Time Resolved ◽  
Bulk Fluid ◽  
Fluorescence Measurements ◽  
System Temperature

We use steady-state and time-resolved fluorescence spectroscopy to probe local solvent–solute interactions between pyrene (the solute) and supercritical water (SCW). Toward this end, we have developed a new fiber-optic-based titanium high-pressure optical cell which can withstand the temperatures and pressure needed to generate supercritical water. Static fluorescence measurements indicate that there is an increase in the local water density surrounding the pyrene molecules (clustering) up to five times the bulk fluid density. This extent of clustering is most prevalent at about one-half the critical density. Consistent with previous work on more mild supercritical fluids (e.g., CO2, CF3H, C2H6), the extent of this solute–fluid clustering decreases as the system temperature and pressure are increased. Time-resolved fluorescence measurements show that the excited-state decay kinetics are exponentially activated and not themselves affected by this solute–fluid clustering process.

Pulse radiolysis of high temperature and supercritical water: experimental setup and eaq− observation

2001 ◽  
Vol 60 (4-5) ◽  
pp. 395-398 ◽  
Author(s):  
Guozhong Wu ◽  
Yosuke Katsumura ◽  
Yusa Muroya ◽  
Xifeng Li ◽  
Yohei Terada
Keyword(s):  
High Temperature ◽  
Supercritical Water ◽  
Pulse Radiolysis ◽  
Experimental Setup

Hydrated electron in subcritical and supercritical water: a pulse radiolysis study

2000 ◽  
Vol 325 (5-6) ◽  
pp. 531-536 ◽  
Author(s):  
G. Wu ◽  
Y. Katsumura ◽  
Y. Muroya ◽  
X. Li ◽  
Y. Terada
Keyword(s):  
Supercritical Water ◽  
Pulse Radiolysis ◽  
Hydrated Electron

Pulse Radiolysis of Supercritical Water. 2. Reaction of Nitrobenzene with Hydrated Electrons and Hydroxyl Radicals†

2002 ◽  
Vol 106 (51) ◽  
pp. 12270-12279 ◽  
Author(s):  
Timothy W. Marin ◽  
Jason A. Cline ◽  
Kenji Takahashi ◽  
David M. Bartels ◽  
Charles D. Jonah
Keyword(s):  
Hydroxyl Radicals ◽  
Supercritical Water ◽  
Pulse Radiolysis ◽  
Hydrated Electrons
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