3 Matching Results

Search Results

Advanced search parameters have been applied.
in creator/contributor: "Asada, Keiji"  
Results: 1 - 3
open access

Hindered Diffusion of Asphaltenes at Elevated Temperature and Pressure Progress Report

Description: The mathematical model which we have developed previously for diffusion controlled adsorption was extended to allow for the inclusion of the effects of extraparticle film mass transfer resistance as embodied in a finite Sherwood number. A Mathcad based program was used to simulate the experimental data using summation of a large number of terms in the infinite series solution. Parametric studies and accompanying plots revealed that the effects of film resistance on the uptake process were found… more
Date: April 2001
Creator: Guin, James A.; Ramakrishnan, Ganesh; Asada, Keiji & Mosley, Brian
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hindered Diffusion of Asphaltenes at Elevated Temperature and Pressure Progress Report

Description: During this past six months we continued our ongoing studies of the diffusion controlled uptake of coal and petroleum asphaltenes into a porous carbon catalyst. Toluene was used as the solvent for experiments at 20 C and 75 C while 1-methylnaphthalene was the solvent for the higher temperature experiments at 100 C, 150 C and 250 C. All runs were made at a pressure of 250 psi (inert He gas). Experiments were performed at 20 C and 75 C, for the petroleum asphaltene/toluene system. For the coal as… more
Date: April 7, 2000
Creator: Guin, James A.; Ramakrishnan, Ganesh & Asada, Keiji
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hindered Diffusion of Asphaltenes at Elevated Temperature and Pressure Progress Report

Description: During this time period work proceeded in two main areas, the performance and analysis of petroleum asphaltene diffusional uptake experiments at 325 C and the preparation and testing of some new carbon based catalysts. In the first area, we performed studies of the diffusion controlled uptake of petroleum asphaltenes into a porous carbon catalyst at 325 C. The experiments were performed under an inert He atmosphere using 1-methylnaphthalene as a solvent. These purpose of these experiments was t… more
Date: September 29, 2000
Creator: Guin, James A.; Ramakrishnan, Ganesh; Asada, Keiji & Mosley, Brian
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen