Investigation into mechanisms and kinetics of asphaltene aggregation in toluene/n-hexane mixtures
Abstract Determining the rate of asphaltene particle growth is one of the main problems in modeling of asphaltene precipitation and deposition. In this paper, the kinetics of asphaltene aggregation under different precipitant concentrations have been studied. The image processing method was performe...
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KeAi Communications Co., Ltd.
2019
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oai:doaj.org-article:e965bcf7de634f87bd155d8da4dc4eb52021-12-02T11:24:56ZInvestigation into mechanisms and kinetics of asphaltene aggregation in toluene/n-hexane mixtures10.1007/s12182-019-00383-31672-51071995-8226https://doaj.org/article/e965bcf7de634f87bd155d8da4dc4eb52019-10-01T00:00:00Zhttp://link.springer.com/article/10.1007/s12182-019-00383-3https://doaj.org/toc/1672-5107https://doaj.org/toc/1995-8226Abstract Determining the rate of asphaltene particle growth is one of the main problems in modeling of asphaltene precipitation and deposition. In this paper, the kinetics of asphaltene aggregation under different precipitant concentrations have been studied. The image processing method was performed on the digital photographs that were taken by a microscope as a function of time to determine the asphaltene aggregation growth mechanisms. The results of image processing by MATLAB software revealed that the growth of asphaltene aggregates is strongly a function of time. Different regions could be recognized during asphaltene particle growth including reaction- and diffusion-limited aggregation followed by reaching the maximum asphaltene aggregate size and start of asphaltene settling and the final equilibrium. Modeling has been carried out to predict the growth of asphaltene particle size based on the fractal theory. General equations have been developed for kinetics of asphaltene aggregation for reaction-limited aggregation and diffusion-limited aggregation. The maximum size of asphaltene aggregates and settling time were modeled by using force balance, acting on asphaltene particles. Results of modeling show a good agreement between laboratory measurements and model calculations.Bahram Soltani SoulganiFatemeh ReisiFatemeh NorouziKeAi Communications Co., Ltd.articleAsphaltene precipitationKinetic modelingDiffusion-limited aggregation (DLA)Image processingAsphaltene aggregationScienceQPetrologyQE420-499ENPetroleum Science, Vol 17, Iss 2, Pp 457-466 (2019) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
Asphaltene precipitation Kinetic modeling Diffusion-limited aggregation (DLA) Image processing Asphaltene aggregation Science Q Petrology QE420-499 |
| spellingShingle |
Asphaltene precipitation Kinetic modeling Diffusion-limited aggregation (DLA) Image processing Asphaltene aggregation Science Q Petrology QE420-499 Bahram Soltani Soulgani Fatemeh Reisi Fatemeh Norouzi Investigation into mechanisms and kinetics of asphaltene aggregation in toluene/n-hexane mixtures |
| description |
Abstract Determining the rate of asphaltene particle growth is one of the main problems in modeling of asphaltene precipitation and deposition. In this paper, the kinetics of asphaltene aggregation under different precipitant concentrations have been studied. The image processing method was performed on the digital photographs that were taken by a microscope as a function of time to determine the asphaltene aggregation growth mechanisms. The results of image processing by MATLAB software revealed that the growth of asphaltene aggregates is strongly a function of time. Different regions could be recognized during asphaltene particle growth including reaction- and diffusion-limited aggregation followed by reaching the maximum asphaltene aggregate size and start of asphaltene settling and the final equilibrium. Modeling has been carried out to predict the growth of asphaltene particle size based on the fractal theory. General equations have been developed for kinetics of asphaltene aggregation for reaction-limited aggregation and diffusion-limited aggregation. The maximum size of asphaltene aggregates and settling time were modeled by using force balance, acting on asphaltene particles. Results of modeling show a good agreement between laboratory measurements and model calculations. |
| format |
article |
| author |
Bahram Soltani Soulgani Fatemeh Reisi Fatemeh Norouzi |
| author_facet |
Bahram Soltani Soulgani Fatemeh Reisi Fatemeh Norouzi |
| author_sort |
Bahram Soltani Soulgani |
| title |
Investigation into mechanisms and kinetics of asphaltene aggregation in toluene/n-hexane mixtures |
| title_short |
Investigation into mechanisms and kinetics of asphaltene aggregation in toluene/n-hexane mixtures |
| title_full |
Investigation into mechanisms and kinetics of asphaltene aggregation in toluene/n-hexane mixtures |
| title_fullStr |
Investigation into mechanisms and kinetics of asphaltene aggregation in toluene/n-hexane mixtures |
| title_full_unstemmed |
Investigation into mechanisms and kinetics of asphaltene aggregation in toluene/n-hexane mixtures |
| title_sort |
investigation into mechanisms and kinetics of asphaltene aggregation in toluene/n-hexane mixtures |
| publisher |
KeAi Communications Co., Ltd. |
| publishDate |
2019 |
| url |
https://doaj.org/article/e965bcf7de634f87bd155d8da4dc4eb5 |
| work_keys_str_mv |
AT bahramsoltanisoulgani investigationintomechanismsandkineticsofasphalteneaggregationintoluenenhexanemixtures AT fatemehreisi investigationintomechanismsandkineticsofasphalteneaggregationintoluenenhexanemixtures AT fatemehnorouzi investigationintomechanismsandkineticsofasphalteneaggregationintoluenenhexanemixtures |
| _version_ |
1718395971320152064 |