| Effect of Hydrocarbon Isomer Composition on Physical Properties of Surrogated e-Gasoline |
| Naeun Choi1, Jeonghyun Park2, Hyung Jun Kim3, Seung Hyun Yoon4, Suhan Park2 |
1Convergence Major of Future Mobility, School of Mechanical Robotics and Automotive Engineering, Graduate School of Konkuk University, 120 Neungdong-ro, Gwangjingu, Seoul 05029, Republic of Korea
2School of Mechanical and Aerospace Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea
3National Institute of Environmental Research, 42 Hwangyeong-ro, Seo-gu, Incheon 37224, Republic of Korea
4Department of Smart e-Automotive, Yeungnam University College, Daegu 42415, Republic of Korea |
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Received: September 11, 2025; Revised: September 11, 2025 Accepted: October 20, 2025. Published online: November 10, 2025. |
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| ABSTRACT |
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This study investigates how the composition of hydrocarbon isomers affects the physical properties of surrogate e-gasoline, with a focus on its potential role in synthetic fuel formulation. As interest in carbon-neutral fuels grows, surrogate e-gasoline has emerged as a promising alternative to conventional options. A predictive program was developed to estimate key fuel properties—including density, vapor pressure, and octane number—based on varying ratios of paraffins, isoparaffins, and naphthenes, incorporating chain growth probability derived from Fischer–Tropsch synthesis. The results show consistent trends between isomer composition and physical properties. For example, isoparaffins tend to improve octane number, while naphthenes contribute to higher density but lower vapor pressure. These trends suggest that adjusting isomer ratios can help achieve fuel characteristics suitable for intended applications. Overall, the proposed approach provides a framework for designing synthetic fuels with properties aligned to the needs of internal combustion engines and low-emission targets. |
| Key Words:
E-gasoline · Fischer-Tropsch synthesis · Fuel properties · Vapor pressure · Viscosity · Density |
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Corresponding Author.
Suhan Park , Email. 
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