scholarly journals Resource Upgrading in Advanced Supercritical Fluid (Supercritical Fluid with Catalyst and Cosolvent): Liquid Fuels from Biomass in Sub and Supercritical Water and Carbohydrate Up-Conversion in Ionic Liquid and Supercritical Fluids Mixtures

2020 ◽  
Author(s):  
Masaru Watanabe ◽  
Masayoshi Wagatsuma ◽  
Keisuke Suzuki ◽  
Takuma Kato ◽  
Yasuto Goto ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Supercritical Fluid ◽  
Supercritical Fluids ◽  
Supercritical Water ◽  
Liquid Fuels

scholarly journals Synthesis of Micro- and Nanoparticles in Sub- and Supercritical Water: From the Laboratory to Larger Scales

2020 ◽  
Vol 10 (16) ◽  
pp. 5508
Author(s):  
F. Ruiz-Jorge ◽  
J. R. Portela ◽  
J. Sánchez-Oneto ◽  
E. J. Martínez de la Ossa
Keyword(s):  
Supercritical Fluids ◽  
Supercritical Water ◽  
Metal Particles ◽  
High Pressure And Temperature ◽  
Particle Generation ◽  
Innovative Method ◽  
Wide Range ◽  
Active Research ◽  
Main Operating ◽  
Temperature Water

The use of micro- and nanoparticles is gaining more and more importance because of their wide range of uses and benefits based on their unique mechanical, physical, electrical, optical, electronic, and magnetic properties. In recent decades, supercritical fluid technologies have strongly emerged as an effective alternative to other numerous particle generation processes, mainly thanks to the peculiar properties exhibited by supercritical fluids. Carbon dioxide and water have so far been two of the most commonly used fluids for particle generation, the former being the fluid par excellence in this field, mainly, because it offers the possibility of precipitating thermolabile particles. Nevertheless, the use of high-pressure and -temperature water opens an innovative and very interesting field of study, especially with regards to the precipitation of particles that could hardly be precipitated when CO2 is used, such as metal particles with a considerable value in the market. This review describes an innovative method to obtain micro- and nanoparticles: hydrothermal synthesis by means of near and supercritical water. It also describes the differences between this method and other conventional procedures, the most currently active research centers, the types of particles synthesized, the techniques to evaluate the products obtained, the main operating parameters, the types of reactors, and amongst them, the most significant and the most frequently used, the scaling-up studies under progress, and the milestones to be reached in the coming years.

Cu(ii) extraction by supercritical fluid carbon dioxide from a room temperature ionic liquid using fluorinated β-diketones

2005 ◽  
Vol 7 (6) ◽  
pp. 421 ◽  
Author(s):  
Soufiane Mekki ◽  
Chien M. Wai ◽  
Isabelle Billard ◽  
Gilles Moutiers ◽  
Clive H. Yen ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Supercritical Fluid ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid ◽  
Supercritical Fluid Carbon Dioxide

Generation and Propagation of Thermally Induced Acoustic Waves in Supercritical Fluids: Numerical and Experimental Results

2010 ◽  
Author(s):  
Bakhtier Farouk ◽  
Zhieheng Lei
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Supercritical Fluid ◽  
Supercritical Fluids ◽  
Acoustic Waves ◽  
Rapid Heating ◽  
Time Dependent ◽  
Cylindrical Chamber ◽  
Thermally Induced ◽  
Supercritical Carbon

The behavior of thermally induced acoustic waves generated by the rapid heating of a bounding solid wall in a closed cylindrical chamber filled with supercritical carbon dioxide is investigated numerically and experimentally. A time-dependent one-dimensional problem is considered for the numerical simulations where the supercritical fluid is contained between two parallel plates. The NIST Reference Database 12 is used to obtain the property relations for supercritical carbon dioxide. The thermally induced pressure (acoustic) waves undergo repeated reflections at the two confining walls and gradually dissipate. The numerically predicted temperature of the bulk supercritical fluid is found to increase homogeneously (the so called piston effect) within the domain. The details of generation, propagation and dissipation of thermally induced acoustic waves in supercritical fluids are presented under different heating rates. In the experiments, a resistance-capacitance circuit is used to generate a rapid temperature increase in a thin metal foil located at one end of a closed cylindrical chamber. The time-dependent pressure variation in the chamber and the temperature history at the foil are recorded by a fast response measurement system. Both the experimental and numerical studies predict similar pressure wave shapes and profiles due to rapid heating of a wall.

Ionic Liquid Fuels for Chemical Propulsion

2012 ◽  
pp. 1-25 ◽  
Author(s):  
Stefan Schneider ◽  
Tom Hawkins ◽  
Yonis Ahmed ◽  
Stephan Deplazes ◽  
Jeff Mills
Keyword(s):  
Ionic Liquid ◽  
Liquid Fuels ◽  
Chemical Propulsion

“Tandem-action” ferrocenyl iodocuprates promoting low temperature hypergolic ignitions of “green” EIL–H2O2 bipropellants

2020 ◽  
Vol 8 (29) ◽  
pp. 14661-14670
Author(s):  
Kangcai Wang ◽  
Tianlin Liu ◽  
Yunhe Jin ◽  
Shi Huang ◽  
Natan Petrutik ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Low Temperature ◽  
Liquid Fuels ◽  
Temperature Conditions ◽  
Auto Ignition ◽  
The Way

The fast auto-ignition of energetic ionic liquid fuels with H2O2 was achieved under low temperature conditions by using new promoters, paving the way for the development of green bipropellants.

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