Experimental investigation of asphaltene deposition in a transparent microchannel

Y. G. Zhuang, A. Goharzadeh, Y. F. Yap, J. C. Chai, N. Mathew, Y. J. Lin, F. Vargas, S. L. Biswal

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This study is focused on experimental investigation of asphaltene deposition in a vertical transparent microchannel. Heptane-induced asphaltene precipitation is utilized to precipitate dissolved asphaltene particles in crude oil and form asphaltene particles in ambient temperature and standard atmospheric pressure. These asphaltene particles deposit gradually on the surface of microchannels. The key parameters that influence the mechanism of asphaltene deposition are the ratio of crude oil to n-heptane and experimental elapsed time. At a constant flowrate, the amount of asphaltene deposited on a transparent channel wall is quantified using a new flow visualization technique based on reflected light intensity and image analysis. Asphaltene precipitation and deposition strongly affect the reflected light intensity through the change of mixture color. Experimental results show that asphaltene deposition process might follow three stages, (i) small asphaltene particle deposition at the beginning of the experiment, (ii) a rapid and continuous deposition increase after few hours and (iii) a decrease on deposition rate in the system at the end of the experimentation. The experimental results regarding different mixing ratios illustrate that deposition increases with the increasing of the concentration of n-heptane. Continuous asphaltene deposition can be represented by light intensity in terms of experimental elapsed time. An empirical fitting in logarithmic trend is plotted and can be used for further numerical simulations. These results provide useful information on behavior of asphaltene deposition in diverse parameter setting conditions and are useful in developing and validating numerical model.

Original languageBritish English
Title of host publicationProceedings of the 1st Thermal and Fluid Engineering Summer Conference, TFESC 2015
PublisherBegell House Inc.
Pages1601-1608
Number of pages8
ISBN (Electronic)9781567004311
StatePublished - 2015
Event1st Thermal and Fluid Engineering Summer Conference, TFESC 2015 - New York City, United States
Duration: 9 Aug 201512 Aug 2015

Publication series

NameProceedings of the Thermal and Fluids Engineering Summer Conference
Volume2015-August
ISSN (Electronic)2379-1748

Conference

Conference1st Thermal and Fluid Engineering Summer Conference, TFESC 2015
Country/TerritoryUnited States
CityNew York City
Period9/08/1512/08/15

Keywords

  • Asphaltene Deposition
  • Image Processing
  • Microchannel
  • Reflected Light Intensity

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