HINDERED DIFFUSION OF ASPHALTENES AT ELEVATED TEMPERATURE AND PRESSURE

Guin, James A. ; Ramakrishnan, Ganesh ; Asada, Keiji ; Mosley, Brian

Auburn University (United States)

关键词: 02 Petroleum;    Capacity;    Asphaltenes;    Adsorption;    Petroleum;   

DOI  :  10.2172/816522
RP-ID  :  NONE
RP-ID  :  FG22-95PC95221
RP-ID  :  816522

美国|英语

来源: UNT Digital Library

【 摘 要 】

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 to increase in significance as the adsorption capacity parameter in the model decreased. In addition, the two carbon catalyst supports prepared in our own laboratory were tested for their diffusional characteristics in uptake experiments using petroleum asphaltenes dissolved in toluene at three temperatures. The resulting experimental data were simulated with the mathematical model developed in the report.