Subsurface Upgrading of Heavy Oils via Solvent Deasphalting Using Asphaltene Precipitants. Preparative Separations and Mechanism of Asphaltene Precipitation Using Benzoyl Peroxide as Precipitant
| Autor: | Lante Carbognani Ortega, Cesar Ovalles, Harris Morazan, Jacqulene Lang, Janie Vien, Ian Phillip Benson, Francisco A Lopez-Linares, Estrella Rogel |
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| Rok vydání: | 2017 |
| Předmět: |
Chromatography
Chemistry 020209 energy General Chemical Engineering Non-blocking I/O Energy Engineering and Power Technology 02 engineering and technology Benzoyl peroxide Solvent Fuel Technology 020401 chemical engineering Oil production 0202 electrical engineering electronic engineering information engineering medicine Asphaltene precipitation Nio nanoparticles 0204 chemical engineering Asphaltene medicine.drug Field conditions Nuclear chemistry |
| Zdroj: | Energy & Fuels. 31:9213-9222 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/acs.energyfuels.7b01588 |
| Popis: | Subsurface upgrading of heavy oil via solvent deasphalting has been reported previously under laboratory and field conditions. However, these processes require a relatively high solvent-to-oil ratio (SvOR > 1:1 v/v) to induce subsurface asphaltene precipitation, increase oil production, and upgrade crude oil in situ. In our previous work, lab experiments demonstrated that asphaltene precipitants reduce the SvOR (∼30–50 vol %) for subsurface upgrading at initial reservoir conditions and when heat is also applied. In this work, the preparative separations were carried out using benzoyl peroxide (BP), Fe2O3, and NiO nanoparticles as asphaltene precipitants for Venezuelan and Canadian heavy crude oils. Initial experiments showed that BP is the most effective additive, producing an increase of ∼21 wt % in the asphaltene content for a 2500 mg/kg dosage. Preparative separations at 5:1 vol/wt ratio and 50 °C showed that the order of activity as asphaltene precipitants is BP > NiO > Fe2O3. In the presence of nicke... |
| Databáze: | OpenAIRE |
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