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The construction of the solid\u2013liquid binary phase diagrams was achieved using differential scanning calorimetry (DSC) and Raman spectroscopy. The <jats:italic>solidus<\/jats:italic> and <jats:italic>liquidus<\/jats:italic> equilibrium temperatures were determined using DSC for thirty-nine different samples, three for the pure <jats:italic>n<\/jats:italic>-alkanes and the remaining for binary mixtures at selected molar compositions and used to acquire the corresponding solid\u2013liquid phase diagrams. The two binary systems of <jats:italic>n<\/jats:italic>-octane\/<jats:italic>n<\/jats:italic>-decane (C<jats:sub>8<\/jats:sub>\/C<jats:sub>10<\/jats:sub>) and <jats:italic>n<\/jats:italic>-decane\/<jats:italic>n<\/jats:italic>-dodecane (C<jats:sub>10<\/jats:sub>\/C<jats:sub>12<\/jats:sub>) are characterized by a eutectic behavior at low temperatures. The eutectic temperature for the system C<jats:sub>8<\/jats:sub>\/C<jats:sub>10<\/jats:sub> was found at 211.95 K and the eutectic composition appeared at the molar fraction x<jats:sub>octane<\/jats:sub>\u2009=\u20090.87. For the system C<jats:sub>10<\/jats:sub>\/C<jats:sub>12<\/jats:sub>, the eutectic temperature was found at 237.85 K, and the eutectic composition appeared for the molar fraction x<jats:sub>decane<\/jats:sub>\u2009=\u20090.78. This work aims to fulfill the lack of available data in the existing literature, considering the potential application of these systems for low-temperature thermal energy storage. Raman spectroscopy was used to complement the DSC data for the construction of the solid\u2013liquid phase equilibrium diagrams, enabling the identification of the solid and liquid phases of the system. Additionally, the <jats:italic>liquidus<\/jats:italic> curve of the phase diagram was successfully described using a modified freezing point depression curve as fitting equation, the absolute root mean square deviation for the data correlation of the C<jats:sub>8<\/jats:sub>\/C<jats:sub>10<\/jats:sub> and C<jats:sub>10<\/jats:sub>\/C<jats:sub>12<\/jats:sub> systems being 2.56 K and 1.22 K, respectively. Ultimately, the fitting procedure also enabled a good prediction of the eutectic point for both studied systems.<\/jats:p>","DOI":"10.1007\/s10765-023-03317-9","type":"journal-article","created":{"date-parts":[[2024,2,1]],"date-time":"2024-02-01T11:02:08Z","timestamp":1706785328000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Solid\u2013Liquid Phase Equilibrium: Alkane Systems for Low-Temperature Energy Storage"],"prefix":"10.1007","volume":"45","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9746-2281","authenticated-orcid":false,"given":"Maria C. M.","family":"Sequeira","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1756-377X","authenticated-orcid":false,"given":"Bernardo A.","family":"Nogueira","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6821-1694","authenticated-orcid":false,"given":"Fernando J. 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