First Observation of Picosecond Kinetics of Hydrated Electrons in Supercritical Water

2009 ◽  
Vol 1 (1) ◽  
pp. 331-335 ◽  
Author(s):  
Yusa Muroya ◽  
Mingzhang Lin ◽  
Vincent de Waele ◽  
Yoshihiko Hatano ◽  
Yosuke Katsumura ◽  
...  
Keyword(s):  
Supercritical Water ◽  
Hydrated Electrons ◽  
Kinetics Of

Kinetics of Supercritical Water Oxidation. SERDP Compliance Technical Thrust Area

1996 ◽  
Author(s):  
Steven F. Rice ◽  
Richard R. Steeper ◽  
Russell G. Hanush ◽  
Jason D. Aiken ◽  
Eric Croiset
Keyword(s):  
Supercritical Water ◽  
Water Oxidation ◽  
Supercritical Water Oxidation ◽  
Kinetics Of

Kinetics of Supercritical Water Oxidation

1995 ◽  
Author(s):  
Steven F. Rice ◽  
Jefferson W. Tester ◽  
Kenneth Brezinsky
Keyword(s):  
Supercritical Water ◽  
Water Oxidation ◽  
Supercritical Water Oxidation ◽  
Kinetics Of

Kinetics of Supercritical Water Oxidation

1995 ◽  
Author(s):  
Steven F. Rice ◽  
Jefferson W. Tester ◽  
Kenneth Brezinsky
Keyword(s):  
Supercritical Water ◽  
Water Oxidation ◽  
Supercritical Water Oxidation ◽  
Kinetics Of

Oxidative Mechanisms and Kinetics of Organics in Supercritical Water

2019 ◽  
pp. 47-108
Author(s):  
Shuzhong Wang ◽  
Donghai Xu ◽  
Yang Guo ◽  
Xingying Tang ◽  
Yuzhen Wang ◽  
...  
Keyword(s):  
Supercritical Water ◽  
Kinetics Of

Kinetics of extra-heavy oil upgrading in supercritical water with and without zinc nitrate using the phase separation kinetic model

2020 ◽  
Vol 165 ◽  
pp. 104961
Author(s):  
Seungjae Sim ◽  
Won Bae Kong ◽  
Jonghyeon Kim ◽  
Jimoon Kang ◽  
Hwi-Sung Lee ◽  
...  
Keyword(s):  
Phase Separation ◽  
Kinetic Model ◽  
Supercritical Water ◽  
Heavy Oil ◽  
Zinc Nitrate ◽  
Heavy Oil Upgrading ◽  
Kinetics Of

Kinetics of Coal Conversion in Supercritical Water

2007 ◽  
Vol 21 (5) ◽  
pp. 2840-2845 ◽  
Author(s):  
Anatoli A. Vostrikov ◽  
Sergey A. Psarov ◽  
Dmitri Yu. Dubov ◽  
Oxana N. Fedyaeva ◽  
Mikhail Ya. Sokol
Keyword(s):  
Supercritical Water ◽  
Coal Conversion ◽  
Kinetics Of

Radiolysis of Supercritical Water at 400°C: A Sensitivity Study of the Density Dependence of the Yield of Hydrated Electrons on the (eaq−+eaq−) Reaction Rate Constant

2016 ◽  
Vol 2 (2) ◽  
Author(s):  
Sunuchakan Sanguanmith ◽  
Jintana Meesungnoen ◽  
David A. Guzonas ◽  
Craig R. Stuart ◽  
Jean-Paul Jay-Gerin
Keyword(s):  
Temperature Dependence ◽  
Density Dependence ◽  
Rate Constant ◽  
Supercritical Water ◽  
Reaction Rate ◽  
Reaction Rate Constant ◽  
Sudden Drop ◽  
Alkaline Water ◽  
Hydrated Electrons ◽  
Neutral Water

The temperature dependence of the rate constant (k) of the bimolecular reaction of two hydrated electrons (eaq−) measured in alkaline water exhibits an abrupt drop between 150°C and 200°C; above 250°C, it is too small to be measured reliably. Although this result is well established, the applicability of this sudden drop in k(eaq−+eaq−)) above ∼150°C to neutral or slightly acidic solution, as recommended by some authors, still remains uncertain. In fact, the recent work suggested that in near-neutral water the abrupt change in k above ∼150°C does not occur and that k should increase, rather than decrease, at temperatures greater than 150°C with roughly the same Arrhenius dependence of the data below 150°C. In view of this uncertainty of k, Monte Carlo simulations were used in this study to examine the sensitivity of the density dependence of the yield of eaq− in the low–linear energy transfer (LET) radiolysis of supercritical water (H2O) at 400°C on variations in the temperature dependence of k. Two different values of the eaq− self-reaction rate constant at 400°C were used: one was based on the temperature dependence of k above 150°C as measured in alkaline water (4.2×108  M−1 s−1), and the other was based on an Arrhenius extrapolation of the values below 150°C (2.5×1011  M−1 s−1). In both cases, the density dependences of our calculated eaq− yields at ∼60  ps and 1 ns were found to compare fairly well with the available picosecond pulse radiolysis experimental data (for D2O) for the entire water density range studied (∼0.15–0.6  g/cm3). Only a small effect of k on the variation of G(eaq−)) as a function of density at 60 ps and 1 ns could be observed. In conclusion, our present calculations did not allow us to unambiguously confirm (or deny) the applicability of the predicted sudden drop of k(eaq−+eaq−) at ∼150°C in near-neutral water.

Kinetics of supercritical water oxidation of isopropanol as an auxiliary fuel and co-fuel

Fuel ◽  
2013 ◽  
Vol 111 ◽  
pp. 574-583 ◽  
Author(s):  
J. Abelleira ◽  
J. Sánchez-Oneto ◽  
J.R. Portela ◽  
E.J. Martínez de la Ossa
Keyword(s):  
Supercritical Water ◽  
Water Oxidation ◽  
Supercritical Water Oxidation ◽  
Kinetics Of
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