Relaxation Dynamics of Ethanol and N-Butanol in Diesel Fuel Blends from Terahertz Spectroscopy
نویسندگان
چکیده
Abstract Binary blends of ethanol-diesel, n-butanol-diesel, ethanol-biodiesel, and n-butanol-biodiesel have been analyzed with terahertz time-domain spectroscopy in a full range concentrations at room temperature. The real imaginary parts the complex dielectric constant were obtained from spectra fitted to Debye model low volume (up 7.5% for ethanol diesel up 20% butanol diesel, biodiesel, biodiesel blends), considering number relaxation processes recommended literature each pure component (single double triple alcohols). results indicate that faster time alcohol mixtures is longer than alcohols. This increases as content increases. excess individually determined. analysis such its different contributions (volume, contrast, interactions) suggests intermolecular interactions between components dominate dynamics pseudo-binary system. Ethanol was found move further away ideal behavior n-butanol. In fact, these latter showed most behavior, suggesting length carbon chain plays an important role. information allows possible link nonlinear physicochemical properties (e.g., viscosity surface tension) molecular their constituent molecules. relation could direct application monitoring fuel composition quality vehicle control systems.
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ژورنال
عنوان ژورنال: Journal of Infrared, Millimeter, and Terahertz Waves
سال: 2021
ISSN: ['1866-6906', '1866-6892']
DOI: https://doi.org/10.1007/s10762-021-00807-5