Results 211 to 220 of about 20,671 (253)
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Solvation in supercritical water
The Journal of Chemical Physics, 2006Solvation in supercritical water under equilibrium and nonequilibrium conditions is studied via molecular dynamics simulations. The influence of solute charge distributions and solvent density on the solvation structures and dynamics is examined with a diatomic probe solute molecule. It is found that the solvation structure varies dramatically with the
Jinsong, Duan +2 more
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Gasification of cyanobacterial in supercritical water
Environmental Technology, 2014Cyanobacterial collected from eutrophic freshwater lakes constituted intractable waste with a rich algae biomass content. Supercritical water gasification (SCWG) was proposed to treat the cyanobacterial and to produce hydrogen for energy. The H 2 yield reached 2.92 mol/kg at reaction conditions of 500 °C, 30 min and 22 MPa; this yield accounted for 26%
Huiwen, Zhang +3 more
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Valeronitrile Hydrolysis in Supercritical Water
ChemSusChem, 2010AbstractNitriles act as important intermediates for the chemical industry and are accessible on a large scale through hydrocyanation or ammonoxidation. Nitrile hydrolysis yields amides and acids used in various applications. The conventional nitrile hydrolysis process relies on stoichiometric amounts of mineral acid or base which inherently deliver ...
Michael, Sarlea +3 more
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Supercritical Water Oxidation of Sulfide
Environmental Science & Technology, 2003Supercritical water oxidation (SCWO) of sulfide wastewater with oxygen as the oxidant was investigated using ammonium sulfide solution as the model waste. The experiments, which were conducted in a bench-scale continuous SCWO installation, indicated that S2- could be completely oxidized to SO4(2-) within the residence time of less than 10 s under the ...
Tao, Wang +3 more
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Line of percolation in supercritical water
The Journal of Chemical Physics, 2005The percolation transition of the hydrogen-bonded clusters of molecules is investigated in supercritical water by Monte Carlo computer simulations. Simulations have been performed at four thermodynamic state points located above the supercritical extension of the vapor-liquid coexistence curve on the p-T phase diagram and at four state points located ...
Lívia, Pártay, Pál, Jedlovszky
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Decomposition of aniline in supercritical water
Journal of Hazardous Materials, 2002The decomposition of aniline in supercritical water (SCW) was studied. Experiments were performed at various temperatures, pressures, residence times, dosage of oxidant H2O2 and initial aniline concentrations to investigate their effect on the destruction efficiency. Manganous sulfate and ferrous sulfate were screened out during the experiment to study
Xin-Hua, Qi +3 more
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Fluidization in Supercritical Water: Heat Transfer between Particle and Supercritical Water
International Journal of Chemical Reactor Engineering, 2018Abstract Supercritical water fluidized bed reactor, which is used to gasify biomass and produce hydrogen, is a new member of fluidized bed family. Forced convection heat transfer between supercritical water and particles is a major basic heat transfer mechanism in supercritical water fluidized bed reactor. The object of this paper was
Liping Wei, Youjun Lu
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Supercritical water pyrolysis of sewage sludge
Waste Management, 2017Municipal sewage sludge (SS) from wastewater treatment plant containing high water content (>85wt.%), lead to the difficulty of co-combustion with MSW or coal due to the high cost of drying. This study explores an alternative method by supercritical water (SCW) pyrolysis of sewage sludge (SS) in a high pressure reaction vessel.
Wenchao, Ma +6 more
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Structure of supercritical water
Journal of Molecular Liquids, 2001Abstract This review paper gives the more up to date information on the structure of supercritical water, at different thermodynamic states, for densities ranging from 0.2 to 0.7 g.cm−3, studied by neutron scattering. The experimental partial pair correlation functions gOH(r), GHH(r) and gOO(r) are compared with the results of molecular dynamics ...
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Oxidation of oily sludge in supercritical water
Journal of Hazardous Materials, 2009The oxidation of oily sludge in supercritical water is performed in a batch reactor at reaction temperatures between 663 and 723 K, the reaction times between 1 and 10 min and pressure between 23 and 27 MPa. Effect of reaction parameters such as reaction time, temperature, pressure, O(2) excess and initial COD on oxidation of oily sludge is ...
Baochen, Cui +5 more
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