Results 211 to 220 of about 20,597 (255)

Valeronitrile Hydrolysis in Supercritical Water

ChemSusChem, 2010
AbstractNitriles 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, Sabine, Kohl, Nina, Blickhan, Herbert, Vogel   +3 more
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Supercritical Water Oxidation of Sulfide

Environmental Science & Technology, 2003
Supercritical 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, Botao, Xiang, Jun, Liu, Zhongyao, Shen   +3 more
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Line of percolation in supercritical water

The Journal of Chemical Physics, 2005
The 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, 2002
The 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, Yuan-Yi, Zhuang, You-Cai, Yuan, Wen-Xin, Gu   +3 more
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Fluidization in Supercritical Water: Heat Transfer between Particle and Supercritical Water

International Journal of Chemical Reactor Engineering, 2018
Abstract 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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Simulation of supercritical water and of supercritical aqueous solutions

The Journal of Chemical Physics, 1991
Molecular dynamics (MD) calculations have been performed to determine equilibrium structure and properties of systems modeling supercritical (SC) water and SC aqueous solutions at two states near the critical point using the simple point charge (SPC) potential model of Berendsen et al. for water.
P. T. Cummings, H. D. Cochran, J. M. Simonson, R. E. Mesmer, S. Karaborni   +4 more
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Chemistry in Supercritical Water

Angewandte Chemie International Edition, 1999
Water is a special liquid-and not only under "normal" conditions. Water in the supercritical state (shaded area in the phase diagram) is distinguished by special properties which are wholly at variance with those of normal water. So far these have usually been exploited for the purification of waste water, for example for the complete oxidation of ...
Dirk Bröll, Claudia Kaul, Alexander Krämer, Petra Krammer, Thomas Richter, Matthias Jung, Herbert Vogel, Peter Zehner   +7 more
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Supercritical water pyrolysis of sewage sludge

Waste Management, 2017
Municipal 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, Guiyue, Du, Jian, Li, Yuanhao, Fang, Li'an, Hou, Guanyi, Chen, Degang, Ma   +6 more
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Oxidation of oily sludge in supercritical water

Journal of Hazardous Materials, 2009
The 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, Fuyi, Cui, Guolin, Jing, Shengli, Xu, Weijing, Huo, Shuzhi, Liu   +5 more
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OPA oxidation rates in supercritical water

Journal of Hazardous Materials, 2005
Supercritical 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, Jae-Duck, Kim, Jong-Chol, Lee, Youn-Woo, Lee   +3 more
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