Physical Properties of a Complex Solution of (Potassium Citrate + Piperazine) as a CO₂ Capture Agent

Abstract

Piperazine (PZ) as an additive was added into a solution of potassium citrate (PC) to form a novel complex solution of the aqueous (PC + PZ) system. Research for the physical properties, density, viscosity, and surface tension, of the aqueous (PC + PZ) system was carried out. Densities and viscosities of the aqueous (PC + PZ) system have been determined at (293.15, 303.15, 313.15, and 323.15) K, and surface tensions of the aqueous (PC + PZ) system have been measured at 293.15 K. Correlations for the physical properties were fitted using the method of mathematics. Predictions of the physical properties of the aqueous (PC + PZ) system were conducted. Performances were compared and discussed between the (PC + PZ) system and other complex systems such as the (PG (glycinate) + PZ) system. Results show that the densities and viscosities of the aqueous (PC + PZ) system decrease with the increase of temperature and PZ mole fraction in the system. The surface tensions of the studied system decrease as the PZ mole fraction in the system increases at 293.15 K. The physical properties of the aqueous (PC + PZ) system are basically similar to that of the aqueous (PG + PZ) system. As opposed to the (PG + PZ) system, the viscosity of the aqueous (PC + PZ) system decreases, while the viscosity of the aqueous (PG + PZ) system increases as the PZ mole fraction in the system increases. The surface tension of the aqueous (PG + PZ) system decreases linearly, while the surface tension of the aqueous (PC + PZ) system is nonlinear with the increase of PZ mole fraction in the system. The prediction values from correlations for the physical properties are in good agreement with the experimental values. The correlations for the physical properties of the aqueous (PC + PZ) system can offer additional data.

Physicochemical Properties of Aqueous Solutions of Sodium l-Prolinate as an Absorbent for CO2 Removal

“…3 Therefore, it has become a global challenge to mitigate the CO 2 emissions by establishing effective technologies for the reduction of bulk emissions of CO 2 from different sources. 4 Chemical absorption is one of the most efficient technologies for removal of CO 2 from various industrial gas streams. This technology employs the chemical solvents which are reactive with CO 2 .…”

“…According to the various climate estimation models; by the year 2100, the average rise in global temperature may reach to about (1.4 to 5.8) °C owing to the effect of global warming . Therefore, it has become a global challenge to mitigate the CO 2 emissions by establishing effective technologies for the reduction of bulk emissions of CO 2 from different sources . Chemical absorption is one of the most efficient technologies for removal of CO 2 from various industrial gas streams.…”