Ultrahigh-Purity Vanadyl Petroporphyrins
| Autor: | B. McKay Rytting, Yunlong Zhang, Anthony S. Mennito, Peter K. Kilpatrick, I. D. Singh, Michael R. Harper |
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| Rok vydání: | 2018 |
| Předmět: |
Chromatography
Chemistry General Chemical Engineering Extraction (chemistry) Energy Engineering and Power Technology Heavy metals 02 engineering and technology 010402 general chemistry Crude oil 01 natural sciences 0104 chemical sciences Catalysis Fuel Technology 020401 chemical engineering Asphalt Emulsion 0204 chemical engineering Asphaltene Refining (metallurgy) |
| Zdroj: | Energy & Fuels. 32:5711-5724 |
| ISSN: | 1520-5029 0887-0624 |
| Popis: | Petroporphyrins contribute to many of the challenges encountered when producing, transporting, and refining heavy crude oil and bitumen. They are the source of heavy metals that poison catalysts and may facilitate the aggregation, deposition, and emulsion formation exhibited by asphaltenes. Here, they are extracted and enriched to ultrahigh purities from several sources: an Athabasca bitumen, a Canadian northern tier crude oil, and a North American heavy crude oil. Our motivation is to produce usable quantities that can be characterized and used in model studies to understand the molecular structure of asphaltenes and to probe asphaltene–petroporphyrin intermolecular interactions, in the bulk and at interfaces. Extraction is performed in a Soxhlet apparatus. The porphyrin-rich extract is then further purified using extrography (on silica-packed columns) and chromatography (on alumina-packed columns). The process yields purified petroporphyrins in unprecedented quantities (>100 mg). These purified petropor... |
| Databáze: | OpenAIRE |
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