Absorption of Carbon Dioxide into Aqueous Xanthan Gum Solution Containing Monoethanolamine

Abstract

Carbon dioxide was absorbed into the aqueous xanthan gum (XG) solution in the range of 0–0.151 wt% containing monoethanolamine (MEA) of 0–2 kmol/m3 in a flat‐stirred vessel with the impeller of 0.05 m and agitation speed of 50 rpm at 25°C and 0.101 MPa to measure the absorption rate of CO2. The volumetric liquid‐side mass transfer coefficient (kLaL) of CO2 decreased with increasing XG concentration, and was correlated with the empirical formula having the rheological behavior of XG solution. The chemical absorption rate of CO2 was estimated by the film theory using the values of kLaL and physicochemical properties of CO2 and MEA. The aqueous XG solutions made the rate of absorption of CO2 accelerated compared with the Newtonian liquid based on the same viscosity of the solution.