Thermophysical Properties of Alternative Fuels
Summary
Alternative fuels—including biodiesel, bioethanol, synthetic paraffinic kerosene and other renewable blends—exhibit thermophysical properties that are critical for their production, storage, transport and utilisation. Key parameters such as density, viscosity, thermal conductivity and compressibility govern energy density, injection performance, heat transfer and phase behaviour under operational conditions. Accurate measurement and predictive modelling across broad pressure and temperature domains ensure reliable engine performance, safe handling and compatibility with existing infrastructure. Advances in experimental techniques and computational methods have refined our understanding of how molecular structure—chain length, branching and degree of unsaturation—influences macroscopic behaviour. Integrating high-precision data with robust models accelerates fuel screening, optimises combustion efficiency and supports the transition to lower-carbon energy systems on a global scale.
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Thermophysical Properties of Alternative Fuels publication trend
The graph below shows the total number of articles in thermophysical properties of alternative fuels across all publications each year (not limited to Nature Index journals).
Technical terms
Density: mass per unit volume, governing energy content and injection parameters.
Viscosity: measure of a fluid’s resistance to flow, affecting atomisation and lubrication.
Thermal conductivity: rate at which a material conducts heat, relevant to fuel-air mixing and combustion chamber cooling.
Isothermal compressibility: relative volume change of a fluid per unit pressure change at constant temperature.
Group contribution method: predictive approach estimating properties from additive molecular fragment volumes.
Quantitative structure–property relationship (QSPR): statistical modelling linking molecular descriptors to physical properties.
References
- Review of density and viscosity data of pure fatty acid methyl ester, ethyl ester and butyl ester. Fuel (2023).
- A Group Contribution Method for Predicting the Alkyl Ester and Biodiesel Densities at Various Temperatures. Sustainability (2022).
- Using Gibbs Energy Additivity Methods for QSPR to Model the Density of Fatty Acid Ethyl Esters and Biodiesels. Journal of Chemistry (2024).
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