Metal porphyrin occlusion: Adsorption during asphaltene aggregation
| Autor: | Vicmary Vargas, Jimmy Castillo |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
020209 energy
General Chemical Engineering Inorganic chemistry Energy Engineering and Power Technology 02 engineering and technology General Chemistry Geotechnical Engineering and Engineering Geology Toluene Porphyrin Metal chemistry.chemical_compound Colloid Hildebrand solubility parameter Fuel Technology Adsorption 020401 chemical engineering chemistry visual_art polycyclic compounds 0202 electrical engineering electronic engineering information engineering visual_art.visual_art_medium 0204 chemical engineering Chemical decomposition Asphaltene |
| Zdroj: | Petroleum Science and Technology. 34:873-879 |
| ISSN: | 1532-2459 1091-6466 |
| Popis: | Metal compounds such as vanadyl and nickel porphyrins present in crude oils are associated to the most polar fraction defined as asphaltenes. The amount and kind of these compounds in the crude oil depend of the variations in origin, maturity, pressure, and temperature. During the asphaltene colloid formation the metal porphyrins could be trapped, occluded, or adsorbed, protecting these compounds from oxidation or chemical degradation. In this work the authors induce the aggregation of asphaltenes by changing the solubility parameter of the media in presence of metal porphyrins. UV-vis absorbance is used to monitored asphaltene aggregation at 350 nm to follow the variations in asphaltene aggregation and 405 nm to follow the porphyrin Soret band. The results showed that more than 50% of the porphyrins were trapped inside the asphaltene aggregate and posterior re-dissolution of the aggregates in toluene showed very low release of the porphyrins, demonstrating the strong interaction between the porph... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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