Experimental research on the miscibility law of methanol-product oil blending systems
Objective As an emerging energy source, methanol plays a crucial role in the energy transition. Implementing sequential transportation of methanol through existing product oil pipelines can lower transportation costs and enhance efficiency in the transportation process. Nevertheless, the specific mi...
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Editorial Office of Oil & Gas Storage and Transportation
2024-11-01
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| Series: | You-qi chuyun |
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| Online Access: | https://yqcy.pipechina.com.cn/cn/article/doi/10.6047/j.issn.1000-8241.2024.11.005 |
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| author | Shangxin ZHAO Guiliang PANG Shujuan QIU Xin HUANG Lin TENG |
| author_facet | Shangxin ZHAO Guiliang PANG Shujuan QIU Xin HUANG Lin TENG |
| author_sort | Shangxin ZHAO |
| collection | DOAJ |
| description | Objective As an emerging energy source, methanol plays a crucial role in the energy transition. Implementing sequential transportation of methanol through existing product oil pipelines can lower transportation costs and enhance efficiency in the transportation process. Nevertheless, the specific miscibility of methanol with gasoline and diesel significantly influences this transmission process. Methods Experimental research was carried out using a setup independently designed and established for blending methanol with product oils, with a focus on determining phase separation temperatures in methanol-product oil blending systems at different methanol-to-oil ratios and varying water contents. Results (1) Anhydrous methanol exhibited complete miscibility with gasoline within the temperature range of － 10 to 50 ℃. (2) In water-containing methanol-gasoline blends, the hydrogen bonds formed by water and methanol molecules were significantly stronger than the binding forces between methanol and gasoline. Even a small amount of water could decrease the miscibility between methanol and gasoline. For every 0.2% increase in water content in methanol, the phase separation temperature increased by 7 to 8 ℃. As the methanol-oil ratio increased, the phase separation temperature of water-containing methanol and gasoline initially rose before decreasing, reaching its peak at a water-containing methanol volume fraction of 40%. (3) A clear stratification was observed between anhydrous methanol and diesel. With rising temperatures, the solubility of diesel in methanol increased. (4) Water-containing methanol was found to be incompletely miscible with diesel. As the water content increased, the separation of methanol from diesel became more pronounced. (5) As temperatures decreased, the miscibility between methanol and product oils reduced, resulting in droplet separation at the bottom of the blending systems. These droplets then ascended gradually due to buoyancy forces. Conclusion The research results clarified the influence of miscibility in methanol-product oil blending systems under various conditions and unveiled the evolution of stratification in these systems as temperatures decrease. These findings offer a scientific foundation and data support for designing and operating the sequential transportation process of methanol in product oil pipelines. |
| format | Article |
| id | doaj-art-d3654af8a189493eac3134650f5897cd |
| institution | DOAJ |
| issn | 1000-8241 |
| language | zho |
| publishDate | 2024-11-01 |
| publisher | Editorial Office of Oil & Gas Storage and Transportation |
| record_format | Article |
| series | You-qi chuyun |
| spelling | doaj-art-d3654af8a189493eac3134650f5897cd2025-08-20T02:57:04ZzhoEditorial Office of Oil & Gas Storage and TransportationYou-qi chuyun1000-82412024-11-0143111239124810.6047/j.issn.1000-8241.2024.11.005yqcy-43-11-1239Experimental research on the miscibility law of methanol-product oil blending systemsShangxin ZHAO0Guiliang PANG1Shujuan QIU2Xin HUANG3Lin TENG4PipeChina West-East Gas Pipeline Company//Xinjiang Key Laboratory for Transportation Safety of Multi-Medium PipelinesPipeChina West-East Gas Pipeline Company//Xinjiang Key Laboratory for Transportation Safety of Multi-Medium PipelinesPipeChina West-East Gas Pipeline Company//Xinjiang Key Laboratory for Transportation Safety of Multi-Medium PipelinesSchool of Chemical Engineering, Fuzhou UniversitySchool of Chemical Engineering, Fuzhou UniversityObjective As an emerging energy source, methanol plays a crucial role in the energy transition. Implementing sequential transportation of methanol through existing product oil pipelines can lower transportation costs and enhance efficiency in the transportation process. Nevertheless, the specific miscibility of methanol with gasoline and diesel significantly influences this transmission process. Methods Experimental research was carried out using a setup independently designed and established for blending methanol with product oils, with a focus on determining phase separation temperatures in methanol-product oil blending systems at different methanol-to-oil ratios and varying water contents. Results (1) Anhydrous methanol exhibited complete miscibility with gasoline within the temperature range of － 10 to 50 ℃. (2) In water-containing methanol-gasoline blends, the hydrogen bonds formed by water and methanol molecules were significantly stronger than the binding forces between methanol and gasoline. Even a small amount of water could decrease the miscibility between methanol and gasoline. For every 0.2% increase in water content in methanol, the phase separation temperature increased by 7 to 8 ℃. As the methanol-oil ratio increased, the phase separation temperature of water-containing methanol and gasoline initially rose before decreasing, reaching its peak at a water-containing methanol volume fraction of 40%. (3) A clear stratification was observed between anhydrous methanol and diesel. With rising temperatures, the solubility of diesel in methanol increased. (4) Water-containing methanol was found to be incompletely miscible with diesel. As the water content increased, the separation of methanol from diesel became more pronounced. (5) As temperatures decreased, the miscibility between methanol and product oils reduced, resulting in droplet separation at the bottom of the blending systems. These droplets then ascended gradually due to buoyancy forces. Conclusion The research results clarified the influence of miscibility in methanol-product oil blending systems under various conditions and unveiled the evolution of stratification in these systems as temperatures decrease. These findings offer a scientific foundation and data support for designing and operating the sequential transportation process of methanol in product oil pipelines.https://yqcy.pipechina.com.cn/cn/article/doi/10.6047/j.issn.1000-8241.2024.11.005methanolproduct oilgasolinedieselmiscibilitywater contentphase separation temperature |
| spellingShingle | Shangxin ZHAO Guiliang PANG Shujuan QIU Xin HUANG Lin TENG Experimental research on the miscibility law of methanol-product oil blending systems You-qi chuyun methanol product oil gasoline diesel miscibility water content phase separation temperature |
| title | Experimental research on the miscibility law of methanol-product oil blending systems |
| title_full | Experimental research on the miscibility law of methanol-product oil blending systems |
| title_fullStr | Experimental research on the miscibility law of methanol-product oil blending systems |
| title_full_unstemmed | Experimental research on the miscibility law of methanol-product oil blending systems |
| title_short | Experimental research on the miscibility law of methanol-product oil blending systems |
| title_sort | experimental research on the miscibility law of methanol product oil blending systems |
| topic | methanol product oil gasoline diesel miscibility water content phase separation temperature |
| url | https://yqcy.pipechina.com.cn/cn/article/doi/10.6047/j.issn.1000-8241.2024.11.005 |
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