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00925njm 22002777a 4500 dc Urteaga, Pedro author Bou-Ali, M. Mounir author Alonso de Mezquia, David author Santamaría Viniegra, Jon author Santamaría, C. author Madariaga, J. A. author Bataller, H. author 2012 It was designed and constructed a new thermogravitational column able to operate at high pressures (up to 50 MPa). This new thermogravitational column is of the cylindrical type with closed ends. It is made of stainless steel. The length of the column is 0.5 m and the gap between its two walls is variable. First, the column was validated at atmospheric pressure by means of measurements of the thermodiffusion coefficient of well-known binary mixtures. Then, this new thermogravitational column was used to measure the thermodiffusion coefficient of the binary mixtures 1,2,3,4-tetrahydronaphtalene/isobutylbenzene, 1,2,3,4-tetrahydronaphtalene/n-dodecane, and isobutylbenzene/n-dodecane at high pressures and within the pressure range between 0.1 and 20 MPa at a mean temperature of 25 °C. We have found a linear dependence between the thermodiffusion coefficient and the pressure. 0034-6748 https://katalogoa.mondragon.edu/janium-bin/janium_login_opac.pl?find&ficha_no=83497 https://hdl.handle.net/20.500.11984/6967 Transport properties Measuring instruments Density measurement Thermal effects Calibration methods Materials properties Organic compounds Binary liquids Viscosity measurements Measurement of thermodiffusion coefficient of hydrocarbon binary mixtures under pressure with the thermogravitational technique