High-pressure viscosity measurements of orange oil saturated with CO2

MARIANA FORTUNATTI-MONTOYA; PABLO E. HEGEL; SELVA PEREDA

Córdoba

Conferencia; PROSCIBA 2023; 2023

Universidad Nacional de Córdoba

In this work, we demonstrate the development of a high-pressure viscosimeter for saturatedliquid mixtures under high pressure for the purpose of supercritical process engineering design.A high-pressure falling weightviscometer is used to measure the viscosity of saturated liquidmixtures of orange oil + CO2 at different temperatures (293 K to 333 K) and saturated pressures(20 bar to 95 bar). This technique has been employed by various authors to measure theviscosity at high-pressure conditions of different oily substrates + CO2 systems. In particular,we investigate the viscosity behavior of orange oil saturated with CO2 (0 - 62 molar % of CO2in the liquid phase). Results show the operating temperature influences the viscosity of both the pure oil and the CO2-saturated oily substrate. It has been observed that the effect of temperature is more pronounced in the variability of the viscosity of the pure oil compared to the analysis of theorange oil + CO2 saturated mixture. Additionally, the viscosity of the liquid mixture decreaseswith increasing CO2 concentration at a given operating temperature. This effect is remarkablynoticeable at the lowest temperature studied (293 K). The new viscosity data is properlycorrelated using a modified version of the Litovitz equation.