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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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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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OPA oxidation rates in supercritical water
Journal of Hazardous Materials, 2005Supercritical water oxidation can effectively destroy a large variety of high-risk wastes resulting from munitions demilitarization and complex industrial chemical. An important design consideration in the development of supercritical water oxidation is the information on the oxidation rate.
Bambang, Veriansyah +3 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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Thermal Lensing in a Supercritical Water Medium
The Journal of Physical Chemistry A, 2006A pulsed, two-beam, thermal lensing experiment was performed to determine the concentration of aqueous solutes above the critical point of water. Despite a very significant mirage effect due to thermal gradients in the cell and absorption by water itself, the thermal lensing signal strength for aqueous benzoic acid in supercritical water was found to ...
Rene G, Rodriguez +7 more
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Hydrogen Bonded Networks in Supercritical Water
The Journal of Physical Chemistry B, 2014In this study, the structure of supercritical water (SCW) is investigated by Raman spectroscopy and molecular dynamics simulations. It was found that the hydrogen bonding in water is closely related to temperature and pressure (or water density). According to the Raman spectroscopic study of SCW, the existence of tetrahedral hydrogen bonds in SCW is ...
Qiang, Sun, Qianqian, Wang, Dongye, Ding
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Supercritical water gasification
Biofuels, Bioproducts and Biorefining, 2008AbstractThis article reviews the work relating to the supercritical water gasifi cation of biomass with a focus on hydrogen production. The high hydrogen yield predicted by thermodynamic calculations and the special properties of near‐ and supercritical water support the biomass degradation; these were the main reasons why the process of ...
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Supercritical water oxidation of landfill leachate
Waste Management, 2011In this paper, ammonia as an important ingredient in landfill leachate was mainly studied. Based on Peng-Robinson formulations and Gibbs free energy minimization method, the estimation of equilibrium composition and thermodynamic analysis for supercritical water oxidation of ammonia (SCWO) was made.
Shuzhong, Wang +5 more
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Electron-Transfer Reactions in Supercritical Water
The Journal of Physical Chemistry B, 2007Free energies and dynamics of electron-transfer reactions for a diatomic donor-acceptor complex in ambient and supercritical water are studied via molecular dynamics computer simulations using a two-state electronic description. The free energy perturbation method is employed to examine diabatic electronic curves relevant to charge separation and ...
Youngseon, Shim, Hyung J, Kim
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