A versatile flow visualisation technique for quantifying mixing in a binary system: application to continuous supercritical water hydrothermal synthesis (SWHS)

2004 ◽  
Vol 59 (14) ◽  
pp. 2853-2861 ◽  
Author(s):  
Paul J Blood ◽  
Joanne P Denyer ◽  
Barry J Azzopardi ◽  
Martyn Poliakoff ◽  
Edward Lester
Keyword(s):  
Hydrothermal Synthesis ◽  
Binary System ◽  
Supercritical Water ◽  
System Application ◽  
Flow Visualisation ◽  
Visualisation Technique

Hydrothermal Synthesis of Potassium Hexatitanates under Subcritical and Supercritical Water Conditions and Its Application in Photocatalysis

2001 ◽  
Vol 13 (3) ◽  
pp. 842-847 ◽  
Author(s):  
Rosiyah Binti Yahya ◽  
Hiromichi Hayashi ◽  
Takako Nagase ◽  
Takeo Ebina ◽  
Yoshio Onodera ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Supercritical Water ◽  
Water Conditions

scholarly journals Hydrothermal Synthesis of Cobalt Nanoparticles in Supercritical Water

2007 ◽  
Vol 54 (9) ◽  
pp. 635-638 ◽  
Author(s):  
Satoshi Ohara ◽  
Hidetsugu Hitaka ◽  
Jing Zhang ◽  
Mitsuo Umetsu ◽  
Takashi Naka ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Supercritical Water ◽  
Cobalt Nanoparticles

Diffusion in the CuSn binary system: application to Nb3Sn composites

1984 ◽  
Vol 19 (2) ◽  
pp. 497-500 ◽  
Author(s):  
S. F. Cogan ◽  
S. Kwon ◽  
J. D. Klein ◽  
R. M. Rose
Keyword(s):  
Binary System ◽  
System Application

Simulation of Nucleation, Growth, and Aggregation of Nonaparticles in Supercritical Water

2013 ◽  
Vol 316-317 ◽  
pp. 1071-1074
Author(s):  
Lu Zhou ◽  
Shu Zhong Wang ◽  
Hong He Ma
Keyword(s):  
Hydrothermal Synthesis ◽  
Rate Constant ◽  
Supercritical Water ◽  
Metal Oxide Nanoparticles ◽  
Operation Time ◽  
Growth Rate Constant ◽  
Synthesis Reaction ◽  
Synthesis Of Nanoparticles ◽  
Size Evolution ◽  
Nucleation Growth

A simulation model was developed for predicting the particle size evolution in hydrothermal synthesis of nanoparticles in supercritical water. Four elementary kinetic processes, including hydrothermal synthesis reaction, nucleation, growth, and aggregation, were involved based on the population balance equations (PBEs). The homogenous nucleation of metal oxide nanoparticles started at the operation time of 3.72μs. When the rate constant of hydrothermal synthesis reaction lnk increased from 2.8 to 6.16, the nucleation rate increased by three orders of magnitude (1021-1024particles/m3•s) and the nucleation period reduced from 0.2s to less than 0.02s. The APS decreased by approximately half when a ten-fold smaller growth rate constant was adopted in the range of 10-11-10-8.

The Aqueous Chemistry of Chromium(III) above 100 °C: Hydrothermal Synthesis of Chromium Spinels

1971 ◽  
Vol 49 (14) ◽  
pp. 2433-2441 ◽  
Author(s):  
T. W. Swaddle ◽  
J. H. Lipton ◽  
G. Guastalla ◽  
P. Bayliss
Keyword(s):  
Stainless Steel ◽  
Hydrothermal Synthesis ◽  
Molecular Oxygen ◽  
Supercritical Water ◽  
Perchloric Acid ◽  
Aqueous Chemistry ◽  
Hydrothermal Deposition ◽  
316 Stainless Steel ◽  
Chromium Vi ◽  
Hydrothermal Origin

The hydrothermal deposition of CrO(OH) from aqueous chromium(III) chloride, nitrate, and perchlorate, and of Cr3(SO4)2(OH)5•H2O and Cr(OH)SO4•2H2O(?) from aqueous chromium(III) sulfate, has been investigated. Aqueous chromium(III) is oxidized to chromium(VI) by 0.4 M perchloric acid above 225 °C, and by molecular oxygen above 250 °C. Aqueous chromium(III) can react at 300 °C with iron or steel, cobalt, and copper to produce FeCr2O4, CoCr2O4, and Cu2Cr2O4, respectively. CrO(OH) reacts with type 316 stainless steel at 440 °C in supercritical water of density 0.7 g cm−3 to yield (Fe,Ni)-Cr2O4, which is the "cubic Cr2O3" of Laubengayer and McCune. The spinels MCr2O4 (M = Mg, Mn, Fe, Co) can be made hydrothermally at ca. 300 °C from Cr(OH)3 and M(OH)2. This information is relevant to corrosion phenomena, and the possible hydrothermal origin of chromite deposits in serpentinized rocks.

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