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Configurational diffusion of asphaltenes in fresh and aged catalysts extrudates. [Mathematical configurational diffusion model]

Description: The objective of this research is to determine the relationship between the size and shape of coal and petroleum macromolecules and their diffusion rates i.e., effective diffusivities, in catalyst pore structures. That is, how do the effective intrapore diffusivities depend on molecule configuration and pore geometry. This quarter we made a more comprehensive literature survey concerning configurational diffusion in porous catalysts or catalyst supports. A detailed literature review is reported… more
Date: January 1, 1992
Creator: Guin, J. A. & Tarrer, A. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Prediction of thermodynamic properties of coal derivatives

Description: The purpose of this research program is to understand and model the effect of the different intermolecular forces on the thermodynamic properties of systems containing pure compounds and mixtures. The compounds under consideration vary considerably in size, shape and energy. Therefore in order to develop a theory capable of describing accurately the thermodynamic properties and phase behavior of such systems over a wide range of temperature and pressure, one has to take into account explicitly … more
Date: November 1, 1992
Creator: Donohue, M.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Configurational diffusion of asphaltenes in fresh and aged catalysts extrudates. Quarterly progress report, June 20, 1992--September 20, 1992

Description: The objective of this research is to determine the relationship between the size and shape of coal and petroleum macromolecules and their diffusion rates i.e., effective diffusivities, in catalyst pore structures. That is, how do the effective intrapore diffusivities depend on molecule configuration and pore geometry. Based on the work done, the following conclusions can be drawn: The intrapore diffusional model can be set up mathematically based on certain assumptions, and the mathematical mod… more
Date: December 1, 1992
Creator: Guin, J. A. & Tarrer, A. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Configurational diffusion of asphaltenes in fresh and aged catalysts extrudates. Quarterly progress report, March 20, 1992--June 20, 1992

Description: The objective of this research is to determine the relationship between the size and shape of coal and petroleum macromolecules and their diffusion rates i.e., effective diffusivities, in catalyst pore structures. That is, how do the effective intrapore diffusivities depend on molecule configuration and pore geometry. This quarter we made a more comprehensive literature survey concerning configurational diffusion in porous catalysts or catalyst supports. A detailed literature review is reported… more
Date: September 1, 1992
Creator: Guin, J. A. & Tarrer, A. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Configurational diffusion of asphaltenes in fresh and aged catalyst extrudates. Quarterly progress report, December 20, 1991--March 20, 1992

Description: This quarter we performed some initial scoping experiments dealing with the diffusive adsorption of petroleum/asphalt and coal molecules on alumina catalysts. In this experiments, the concentration of solute molecules in a bath exposed to the adsorbing solid (alumina) was monitored as a function of time. Because these are only preliminary scoping experiments, no quantitative calculations of diffusivity or adsorption equilibria were made; however, these experiments do demonstrate the feasibility… more
Date: July 1, 1992
Creator: Guin, J. A. & Tarrer, A. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Configurational diffusion of asphaltenes in fresh and aged catalyst extrudates

Description: This quarter we performed some initial scoping experiments dealing with the diffusive adsorption of petroleum/asphalt and coal molecules on alumina catalysts. In this experiments, the concentration of solute molecules in a bath exposed to the adsorbing solid (alumina) was monitored as a function of time. Because these are only preliminary scoping experiments, no quantitative calculations of diffusivity or adsorption equilibria were made; however, these experiments do demonstrate the feasibility… more
Date: January 1, 1992
Creator: Guin, J. A. & Tarrer, A. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Waste-surface mapping of the Fernald K-65 silos using a structured light measurement system

Description: A remotely operated surface-mapping measurement system was developed by the Robotics & Process Systems Division at Oak Ridge National Laboratory for use in the K-65 waste-storage silos at Fernald, Ohio. The mapping system used three infrared line-generating laser diodes as illumination sources and three high-resolution, low-lux, calibrated, black-and-white, charge-coupled-device video cameras as receivers. These components were combined to form structured light source range and direction sensor… more
Date: October 1, 1992
Creator: Burks, B. L.; DePiero, F. W.; Dinkins, M. A.; Rowe, J. C.; Selleck, C. B. & Jacoboski, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Prediction of thermodynamic properties of coal derivatives. Annual technical report, March 1, 1992--February 28, 1993

Description: The purpose of this research program is to understand and model the effect of the different intermolecular forces on the thermodynamic properties of systems containing pure compounds and mixtures. The compounds under consideration vary considerably in size, shape and energy. Therefore in order to develop a theory capable of describing accurately the thermodynamic properties and phase behavior of such systems over a wide range of temperature and pressure, one has to take into account explicitly … more
Date: November 1, 1992
Creator: Donohue, M. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Configurational diffusion of asphaltenes in fresh and aged catalysts extrudates

Description: The objective of this research is to determine the relationship between the size and shape of coal and petroleum macromolecules and their diffusion rates i.e., effective diffusivities, in catalyst pore structures. That is, how do the effective intrapore diffusivities depend on molecule configuration and pore geometry. Based on the work done, the following conclusions can be drawn: The intrapore diffusional model can be set up mathematically based on certain assumptions, and the mathematical mod… more
Date: January 1, 1992
Creator: Guin, J. A. & Tarrer, A. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application of a matrix-fracture transfer pseudofunction in geothermal reservoir simulation

Description: A fine-grid, single porosity model of a matrix-fracture system was used to visualize the pressure response and mass transfer mechanisms in a vapor-dominated geothermal reservoir. The observed pressure response and saturation distributions were used to generate a pseudofunction representing the product of vapor phase relative permeability and matrix-fracture transfer shape factor for a dual-porosity model. The pseudofunction was found to be a function of vapor saturation. It was used in place of… more
Date: January 1, 1992
Creator: Lim, K. T.; Enedy, K. L.; Bloomfield, K. K. & Aziz, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Waste-surface mapping of the Fernald K-65 silos using a structured light measurement system

Description: A remotely operated surface-mapping measurement system was developed by the Robotics Process Systems Division at Oak Ridge National Laboratory for use in the K-65 waste-storage silos at Fernald, Ohio. The mapping system used three infrared line-generating laser diodes as illumination sources and three high-resolution, low-lux, calibrated, black-and-white, charge-coupled-device video cameras as receivers. These components were combined to form structured light source range and direction sensors … more
Date: October 1, 1992
Creator: Burks, B. L.; DePiero, F. W.; Dinkins, M. A.; Rowe, J. C.; Selleck, C. B. & Jacoboski, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Determining the radiative properties of pulverized-coal particles from experiments. Final report

Description: A comprehensive coupled experimental-theoretical study has been performed to determine the effective radiative properties of pulverized-coal/char particles. The results obtained show that the ``effective`` scattering phase function of coal particles are highly forward scattering and show less sensitivity to the size than predicted from the Lorenz-Mie theory. The main reason for this is the presence of smaller size particles associated with each larger particle. Also, the coal/char particle clou… more
Date: February 1, 1992
Creator: Menguec, M. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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