2026-08-11T14:00:40Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/588822026-04-14T08:13:32Zcom_10324_31661com_10324_952com_10324_894col_10324_31662

00925njm 22002777a 4500 dc Concepción Rodríguez, Eduardo Iván author Moreau Ortega, Alejandro author Vega Maza, David author Paredes Mendez, Xavier author Martín González, María del Carmen author 2023 A high-pressure flow calorimeter is used to determine isobaric heat capacities for aqueous solutions of some amines such as MEA, DEA TEA, DMAE, MDEA, PZ from T = (293.15 to 353.15) K and up to 25 MPa. The experimental device can measure heat capacities with an estimated total uncertainty better than 1% for a coverage factor k = 2. The isobaric heat capacity values are analysed in conjunction with their temperature and pressure dependencies. Furthermore, empirical equations are proposed to fit isobaric heat capacities as functions of temperature and pressure for given conditions, for this kind of mixtures, obtaining standard deviations within the uncertainty of the measurements. Finally, DMAE shows the highest value of heat capacity and TEA the lowest value, when they are compared at the same conditions of temperature, pressure and composition. Journal of Molecular Liquids, 2023, vol. 377, 121575 0167-7322 https://uvadoc.uva.es/handle/10324/58882 10.1016/j.molliq.2023.121575 121575 Journal of Molecular Liquids Física Calorímetros y calorimetría Heat capacities of different amine aqueous solutions at pressures up to 25 MPa for CO2 capture