A computational model for supercritical water oxidation of organic toxic wastes |
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| Institution: | 1. Center for Turbulence Research, Stanford University, Stanford, CA 94305, USA;2. Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USA;3. Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada;1. Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, United States;2. Center for Turbulence Research, Stanford University, Stanford, CA 94305, United States;3. Propulsion Division, Vehicle Technology Directorate, U.S. Army Research Laboratory, Aberdeen Proving Ground, MD 21005, United States |
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| Abstract: | A computational fluid dynamics (CFD) model was proposed to simulate the supercritical water oxidation (SCWO) process for organic wastes. The SUPERTRAPP code (by NIST) for thermodynamic and transport properties of hydrocarbon mixtures was incorporated into the commercialized general purpose CFD code CFD-ACE for flow under supercritical pressure. The global kinetic models for supercritical water oxidation of methanol and methane (developed at MIT Energy Lab) were implemented and validated in the CFD-ACE framework against experimental data from a tubular reactor. A series of parametric studies to investigate flow rates, thermal boundary conditions and reactor geometry was performed for methane SCWO in a co-axial reactor and the optimized operating conditions and reactor geometry were obtained. Detailed three-dimensional flow, heat and chemistry simulations of methanol SCWO in the CSTR at MIT Energy Lab were also performed with predicted conversions comparable to measurements. |
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