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Two-Phase Spray Cooling with Water/2-Propanol Binary Mixtures for High Heat Flux Focal Source

Description: Two-phase spray cooling has been an emerging thermal management technique offering high heat transfer coefficients and critical heat flux levels, near-uniform surface temperatures, and efficient coolant usage that enables to design of compact and lightweight systems. Due to these capabilities, spray cooling is a promising approach for high heat flux applications in computing, power electronics, and optics. Two-phase spray cooling inherently depends on saturation temperature-pressure relations… more
Date: December 2016
Creator: Obuladinne, Sai Sujith
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Solubility of 2-Hydroxybenzoic Acid in Water, 1-Propanol, 2-Propanol, and 2-Propanone at (298.2 to 338.2) K and Their Aqueous Binary Mixtures at 298.2 K

Description: Article discussing the solubility of 2-hydroxybenzoic acid in water, 1-propanol, 2-propanol, and 2-propanone at (298.2 to 338.2) K and their aqueous binary mixtures at 298.2 K.
Date: October 25, 2012
Creator: Fakhree, Mohammad Amin Abolghassemi; Ahmadian, Somaieh; Panahi-Azar, Vahid; Jouyban, Abolghasem & Acree, William E. (William Eugene)
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
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Solubility of Phenothiazine in Water, Ethanol, and Propylene Glycol at (298.2 to 338.2) K and Their Binary and Ternary Mixtures at 298.2 K

Description: Article on the solubility of phenothiazine in water, ethanol, and propylene glycol at (298.2 to 338.2) K and their binary and ternary mixtures at 298.2 K.
Date: June 2, 2011
Creator: Ahmadian, Somaieh; Panahi-Azar, Vahid; Fakhree, Mohammad Amin Abolghassemi; Acree, William E. (William Eugene) & Jouyban, Abolghasem
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
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Thermal dissociation behavior and dissociation enthalpies of methane-carbon dioxide mixed hydrates

Description: Replacement of methane with carbon dioxide in hydrate has been proposed as a strategy for geologic sequestration of carbon dioxide (CO{sub 2}) and/or production of methane (CH{sub 4}) from natural hydrate deposits. This replacement strategy requires a better understanding of the thermodynamic characteristics of binary mixtures of CH{sub 4} and CO{sub 2} hydrate (CH{sub 4}-CO{sub 2} mixed hydrates), as well as thermophysical property changes during gas exchange. This study explores the thermal d… more
Date: February 15, 2011
Creator: Kwon, T.H.; Kneafsey, T.J. & Rees, E.V.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Intermolecular potential parameters and combining rules determined from viscosity data

Description: The Law of Corresponding States has been demonstrated for a number of pure substances and binary mixtures, and provides evidence that the transport properties viscosity and diffusion can be determined from a molecular shape function, often taken to be a Lennard-Jones 12-6 potential, that requires two scaling parameters: a well depth {var_epsilon}{sub ij} and a collision diameter {sigma}{sub ij}, both of which depend on the interacting species i and j. We obtain estimates for {var_epsilon}{sub i… more
Date: May 7, 2010
Creator: Bastien, Lucas A.J.; Price, Phillip N. & Brown, Nancy J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Transport Properties for Combustion Modeling

Description: This review examines current approximations and approaches that underlie the evaluation of transport properties for combustion modeling applications. Discussed in the review are: the intermolecular potential and its descriptive molecular parameters; various approaches to evaluating collision integrals; supporting data required for the evaluation of transport properties; commonly used computer programs for predicting transport properties; the quality of experimental measurements and their import… more
Date: February 19, 2010
Creator: Brown, N. J.; Bastein, L. & Price, P. N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Kinetic Modeling of Gasoline Surrogate Components and Mixtures under Engine Conditions

Description: Real fuels are complex mixtures of thousands of hydrocarbon compounds including linear and branched paraffins, naphthenes, olefins and aromatics. It is generally agreed that their behavior can be effectively reproduced by simpler fuel surrogates containing a limited number of components. In this work, an improved version of the kinetic model by the authors is used to analyze the combustion behavior of several components relevant to gasoline surrogate formulation. Particular attention is devoted… more
Date: January 11, 2010
Creator: Mehl, M; Pitz, W J; Westbrook, C K & Curran, H J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Determining the Porosity and Saturated Hydraulic Conductivity of Binary Mixtures

Description: Gravels and coarse sands make up significant portions of some environmentally important sediments, while the hydraulic properties of the sediments are typically obtained in the laboratory using only the fine fraction (e.g., <2 mm or 4.75 mm). Researchers have found that the content of gravel has significant impacts on the hydraulic properties of the bulk soils. Laboratory experiments were conducted to measure the porosity and the saturated hydraulic conductivity of binary mixtures with differen… more
Date: September 27, 2009
Creator: Zhang, Z. F.; Ward, Anderson L. & Keller, Jason M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Computational investigation of thermal gas separation for CO2 capture.

Description: This report summarizes the work completed under the Laboratory Directed Research and Development (LDRD) project 09-1351, 'Computational Investigation of Thermal Gas Separation for CO{sub 2} Capture'. Thermal gas separation for a binary mixture of carbon dioxide and nitrogen is investigated using the Direct Simulation Monte Carlo (DSMC) method of molecular gas dynamics. Molecular models for nitrogen and carbon dioxide are developed, implemented, compared to theoretical results, and compared to s… more
Date: September 1, 2009
Creator: Gallis, Michail A.; Bryan, Charles R.; Brady, Patrick Vane; Torczynski, John R. & Brooks, Carlton, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comments on "Solubility of Ethyl Maltol in Aqueous Ethanol Mixtures" (Liu, B.-S.; Liu, R.-J.; Hu, Y.-Q.; Hu, Q.-F. J. Chem. Eng. Data 2008, 53, 2712-2714)

Description: This article provides comments on "Solubility of Ethyl Maltol in Aqueous Ethanol Mixtures," published in 2008 in the 'Journal of Chemical and Engineering Data.'
Date: February 17, 2009
Creator: Jouyban, Abolghasem & Acree, William E. (William Eugene)
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
open access

Comments on "Thermophysical Properties of para-Anisaldehyde (1) + Chlorobenzene (2) at Temperatures of (303.15, 313.15, and 323.15) K and a Pressure of 0.1 MPa" (Baskaran, R.; Kubendran, T. R. J. Chem. Eng. Data 2008, 53, 978-982)

Description: Comments regarding the article, "Thermochemical properties of para-anisaldehyde (1) + chlorobenzene (2) at temperatures of (303.15, 313.15, and 323.15) K and a pressure of 0.1 MPa," published in 2008 in the Journal of Chemical and Engineering Data.
Date: July 19, 2008
Creator: Jouyban, Abolghasem & Acree, William E. (William Eugene)
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
open access

Highly Selective H2 Separation Zeolite Membranes for Coal Gasification Membrane Reactor Applications

Description: Zeolite membranes are thermally, chemically, and mechanically stable. They also have tunable molecular sieving and catalytic ability. These unique properties make zeolite membrane an excellent candidate for use in catalytic membrane reactor applications related to coal conversion and gasification, which need high temperature and high pressure range separation in chemically challenging environment where existing technologies are inefficient or unable to operate. Small pore, good quality, and thi… more
Date: September 24, 2007
Creator: Hong, Mei; Noble, Richard & Falconer, John
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Investigations of charged interfaces for electric vehicle applications

Description: We refined the parametrization of our model for the hydrogen evolution on Pt(111) in the presence of SO4H2 [1,2,3,4]. In particular we studied the effects of changing the turning point of the water. The form of the voltammogram is not very sensitive to the exact position of the turning point, which in previous work was treated as an adjustable parameter. Physically a reasonable choice is that the turning point is the PZC (point of zero charge). This new parametrization clarified some issues rela… more
Date: March 6, 2007
Creator: Blum, Lesser
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Prediction of the bubble point pressure for the binary mixture of ethanol and 1,1,1,2,3,3,3-heptafluoropropane from Gibbs ensemble Monte Carlo simulations using the TraPPE force field

Description: Configurational-bias Monte Carlo simulations in the Gibbs ensemble using the TraPPE force field were carried out to predict the pressure-composition diagrams for the binary mixture of ethanol and 1,1,1,2,3,3,3-heptafluoropropane at 283.17 and 343.13 K. A new approach is introduced that allows to scale predictions at one temperature based on the differences in Gibbs free energies of transfer between experiment and simulation obtained at another temperature. A detailed analysis of the molecular s… more
Date: February 28, 2007
Creator: Rai, N; Rafferty, J L; Maiti, A & Siepmann, I
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Laboratory Investigations in Support of Carbon Dioxide-in-Water Emulsions Stabilized by Fine Particles for Ocean and Geologic Sequestration of Carbon Dioxide

Description: Since the submission of our last Semi-annual Report, dated September 2006, the research objectives of this Co-operative Agreement shifted toward geologic sequestration of carbon dioxide. In the period September 2006-February 2007, experiments were conducted in a High-Pressure Batch Reactor (HPBR) for creating emulsions of liquid carbon dioxide (/CO{sub 2})-in-water stabilized by fine particles for geologic sequestration of CO{sub 2}. Also, emulsions were created in water of a binary mixture of … more
Date: January 8, 2007
Creator: Golomb, Dan; Ryan, David & Barry, Eugene
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Highly Selective H2 Separation Zeolite Membranes for Coal Gasification Membrane Reactor Applications

Description: Zeolite membranes are thermally, chemically, and mechanically stable. They also have tunable molecular sieving and catalytic ability. These unique properties make zeolite membrane an excellent candidate for use in catalytic membrane reactor applications related to coal conversion and gasification, which need high temperature and high pressure range separation in chemically challenging environment where existing technologies are inefficient or unable to operate. Small pore, good quality, and thi… more
Date: September 24, 2006
Creator: Hong, Mei; Noble, Richard D. & Falconer, John L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Computational Fluid Dynamics Simulation of Fluidized Bed Polymerization Reactors

Description: Fluidized beds (FB) reactors are widely used in the polymerization industry due to their superior heat- and mass-transfer characteristics. Nevertheless, problems associated with local overheating of polymer particles and excessive agglomeration leading to FB reactors defluidization still persist and limit the range of operating temperatures that can be safely achieved in plant-scale reactors. Many people have been worked on the modeling of FB polymerization reactors, and quite a few models are … more
Date: August 9, 2006
Creator: Fan, Rong
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Aggregation kinetics in a model colloidal suspension

Description: The authors present molecular dynamics simulations of aggregation kinetics in a colloidal suspension modeled as a highly asymmetric binary mixture. Starting from a configuration with largely uncorrelated colloidal particles the system relaxes by coagulation-fragmentation dynamics to a structured state of low-dimensionality clusters with an exponential size distribution. The results show that short range repulsive interactions alone can give rise to so-called cluster phases. For the present mode… more
Date: August 8, 2005
Creator: Bastea, S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neutron Source Strength Estimates from (a, n) Reactions in Binary Mixtures of Actinide Particles and Light Element Particles

Description: The cumulative distribution of package dose rates, based on the 18 batches of historical PuO{sub 2} particle size distributions, is shown in Fig. 6 for ''Hanford 10-13% Pu-240'' plutonium. The calculated dose rates for all batches range from about 50 mrem/h to about 2,200 mrem/h, with over 50% of the batches being less than the 200 mrem/h limit for public transportation. A more refined analysis would show that almost all of the batches would be less than 200 mrem/h, but some could exceed this l… more
Date: May 6, 2005
Creator: Boles, J. L.; Hafner, R. S. & Fischer, L. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Molecular-Thermodynamic Lattice Model for Binary Mixtures

Description: Using a method originally proposed for describing a continuum-space polymer fluid, a new expression for the Helmholtz energy of mixing is proposed for a binary lattice mixture. Molecular size asymmetry and nonrandomness due to segment-segment interactions are taken into account. An expression proposed by Yan, Liu and Hu for a binary lattice mixture of monomers, based on the Ising model, is used as a reference system. Calculated critical constants and liquid-liquid coexistence curves are in good… more
Date: April 29, 2005
Creator: Qin, Yuan & Prausnitz, John M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Modification of TOUGH2 for Enhanced Coal Bed Methane Simulations

Description: The GEO-SEQ Project is investigating methods for geological sequestration of CO{sub 2}. This project, which is directed by LBNL and includes a number of other industrial, university, and National Laboratory partners, is evaluating computer simulation models including TOUGH2. One of the problems to be considered is Enhanced Coal Bed Methane (ECBM) recovery. In this scenario, CO2 is pumped into methane-rich coal beds. Due to adsorption processes, the CO2 is sorbed onto the coal, which displaces t… more
Date: January 1, 2003
Creator: WEBB, STEPHEN W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Identification and Experimental Database for Binary and Multicomponent Mixtures With Potential for Increasing Overall Cycle Efficiency

Description: This report describes an experimental investigation designed to identify binary and multicomponent mixture systems that may be for increasing the overall efficiency of a coal fired unit by extracting heat from flue gases. While ammonia-water mixtures have shown promise for increasing cycle efficiencies in a Kalina cycle, the costs and associated range of thermal conditions involved in a heat recovery system may prohibit its use in a relatively low temperature heat recovery system. This investig… more
Date: May 2002
Creator: Bajorek, Stephen M. & Schnelle, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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