2025/05/07 by Singh, Dinesh, Safarov, Javid, Windmann, Thorsten +2
#10 #10-Pentaoxaundecane #12-Hexaoxatridecane #2 #4 #4-Dioxapentane #500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften #6 #6-Trioxaheptane #8 #8-Tetraoxanonane #Isobaric heat capacity #differential scanning calorimeter #ethanol #methanol #polyoxymethylene dimethyl ethers #water
paper · doi:10.14279/depositonce-23479
Polyoxymethylene dimethyl ethers (OME𝑥) are frequently considered as a promising alternative to diesel fuel. However, for the development of the respective technology, a sound knowledge about their thermo physical properties is required. Isobaric heat capacity measurements of five OME𝑥 with a chain length 𝑥 = 1 to 5 are conducted under ambient pressure in the temperature range from about 248 K to 390 K. These are: 2,4-Dioxapentane (OME1), 2,4,6-Trioxaheptane (OME2), 2,4,6,8-Tetraoxanonane (OME3), 2,4,6,8,10-Pentaoxaundecane (OME4) and 2,4,6,8,10,12-Hexaoxatridecane (OME5). To validate the employed apparatus and measurement procedure, water, methanol and ethanol are sampled as well. The measurements are carried out with a differential scanning calorimeter 𝜇DSC by Setaram with an overall relative expanded (𝑘 = 2) uncertainty 𝑈𝑟(𝑐𝑝) of ±1%. Polynomial equations in terms of temperature are fitted to the measured data. An extensive comparison to literature data is made.