UScholar Works
 
Filters: Department: "Chemical Engineering" Collection: "ir_uspace"
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CreatorTitleDescriptionSubjectDate
1 Ring, Terry ArthurRoom temperature co-precipitation synthesis of magnetite nanoparticles in a large pH window with different basesMagnetite nanoparticles (Fe3O4) represent the most promising materials in medical applications. To favor high-drug or enzyme loading on the nanoparticles, they are incorporated into mesoporous materials to form a hybrid support with the consequent reduction of magnetization saturation. The direct sy...2013-01-01
2 Pershing, David W.Bench and pilot scale process evaluation of reburning for in-furnace NOx reductionThis paper describes a combined experimental and theoretical study which was undertaken to quantify the impact of fuel and process parameters on reburning effectiveness and provide the scaling information required for commercial application of reburning under highly varied industrial conditions. Ini...Reburning; Nitrogen oxides reduction; Staged fuel injection1986
3 Lighty, Joann; Sarofim, Adel F.; Eddings, Eric G.Modeling the coagulation of charged particlesOne important mechanism in the growth of soot particles is to understand the role of particle charge in the coagulation of the particles. A previously developed model has been extended to include the coagulation of charged particles. The model includes neutral particles and charged particles (up to ...Charged particles; Flame ionization; Modeling2004
4 Ring, Terry ArthurValidation of energy moments from the one-dimensional energy dependent neutron diffusion equation, MCNP5 and Attila-7.1.0 with the GODIVA experimentNormalized neutron energy moments (moments) from the one-dimensional energy dependent neutron diffusion equation (EDNDE), Monte Carlo N Particle 5 version 1.40 (MCNP5) and Attila-7.1.0-beta version (Attila) are validated with the GODIVA experiment (GODIVA). Energy moments 0-5 for all three methods a...2012-01-01
5 Sutherland, James ClaytonA comparison of various models in predicting ignition delay in single-particle coal combustionIn this paper, individual coal particle combustion under laminar conditions is simulated using models with various levels of complexity for the particle and gas phase chemical kinetics. The mass, momentum and energy governing equations are fully coupled between the particle and the gas phase. In the...2014-01-01
6 Eddings, Eric G.; Sarofim, Adel F.; Pugmire, Ronald J.Selection of surrogates for jet fuelsAbstract: A. detailed characterisation of JP fuels is provided based on literature data for the average of 55 worldwide and 4 US Jet-A fuels. These are complemented by NMR analysis of a JP-8 that provides the fractions of the carbon in the fuel that are present as protonated, bridgehead, and non-sub...Jet propulsion fuel; Surrogates; Simulations2008
7 Pershing, David W.; Wendt, Jost O. L.Pulverized coal combustion: NOx formation mechanisms under fuel rich and staged combustion conditionsA 2 Kg/h pulverized fuel one dimensional flame combustor was used to determine time resolved NO profiles under fuel rich and staged combustion conditions. Seven solid fuels, including two coal chars, were investigated. Results show that at all fuel rich conditions NO is formed rapidly and then is ...Flame; Composition; Reaction1979
8 Smith, Philip J.Reduced-order PCA models for chemical reacting flowsOne of the most challenging aspects of turbulent combustion research is the development of reduced-order combustion models which can accurately reproduce the physics of the real system. The identification and utilization of the low dimensional manifolds in these system is paramount to understand and...2014-01-01
9 Pershing, David W.Design and construction of a rotary kiln simulator for use in studying the incineration of hazardous wasteRotary kilns have been used extensively in the cement industry to calcine limestone. In the past few years, the technology has been viewed as a possible option for the incineration of hazardous waste materials, especially for the disposal of solid wastes and the cleanup of contaminated soils and tra...Rotary kilns; Hazardous waste; Waste burning1989-08
10 Ring, Terry ArthurVerification of analytic energy moments for the one-dimensional energy dependent neutron diffusion equation with MCNP5 and Attila-7.1.0The energy dependent neutron diffusion equation (EDNDE) is converted into a moment equation which is solved analytically for the 1-D problem of a bare sphere of pure 235U. The normalized moments 0-5 generated analytically are compared to normalized energy moments, from Monte Carlo N Particle 5 versi...2012-01-01
11 Whitty, Kevin J.A pulse-width modulation controlled wire-mesh heater apparatus for investigation of solid fuel pyrolysisA novel wire mesh heater apparatus has been developed to study the devolatilization of solid fuels under pressurized conditions at well-controlled heating rates on the order of 1000 K/s. The apparatus combines direct current and pulse-width modulation with a fast-acting and high current-capacity re...2012-01-01
12 Pershing, David W.Control of NOx and particulate emissions from spreader-stokers fired with hogged woodThe formation and emission of nitrogen oxides and particulate carry-over were studied from spreader-stoker combustion of hogged Douglas-fir, with a focus on optimizing the combustion conditions in each of the two distinct combustion zones, the bed phase and the suspension phase local oxygen availabi...Chemical analysis; Combustion; Emission; Engineering; Environmental control; Fuels; Nitrogen compounds; Particulates; NOx; Hogged wood1987
13 Eddings, Eric G.; Sarofim, Adel F.Experimental study of burning rate in jet-fuel pool firesExperiments were carried out in a 30 cm diameter pool fire, for both transient and steady-state conditions, utilizing jet fuel, Norpar-15, and a surrogate mixture of hydrocarbons that simulates jet-fuel behavior in a pool fire. Steady state pool fire tests match previous results well. The transient ...Pool fires; Jet propulsion fuel; Norpar-152004
14 Sutherland, James Clayton; Kerstein, Alan R.; Chen, Jaqueline H.An evaluation of the one-dimensional turbulence model: comparison with direct numerical simulation of CO/H2 jets with extinction and reignitionAbstract A variant of the One-Dimensional Turbulence (ODT) model formulated in an Eulerian reference frame is applied to a planar nonpre mixed turbulent jet flame and results from the model prediction are compared with DNS data. The model employed herein solves the full set of conservation equation...2010
15 Eddings, Eric G.; Sarofim, Adel F.; Pershing, David W.Production of nitrogen oxide during char oxidation at pulverized coal combustion conditionsMore stringent regulations for NOx control in pulverized coal combustors have made the scientific community focus on sources of emissions that were traditionally considered less relevant to the overall NOx production. The oxidation to NO of the nitrogen that is organically bound to the char is one o...2001
16 Eddings, Eric G.; Sarofim, Adel F.Fast cook-off tests reportThe Center for the Simulation of Accidental Fires and Explosions (C-SAFE) at the University of Utah is focused on providing science-based tools for the numerical simulation of accident scenarios involving fires and high-energy devices (Pershing, 2000). The initial computational efforts are concentra...Heat flux; Heat transfer; Cookoff tests; Center for the Simulation of Accidental Fires and Explosions; C-SAFE2003
17 Eddings, Eric G.The potential of on-line optical flow measurement in the control and monitoring of pilot-scale oxy-coal flamesDigital image processing techniques oer a wide array of tools capable of extracting apparent displacement or velocity information from sequences of images of moving objects. Optical flow algorithms have been widely used in areas such as traffic monitoring and surveillance. The knowledge of instantan...2014-01-01
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