Absorption of Carbon Dioxide into Non‐Newtonian Liquid. III. Effect of Chemical Reaction

Abstract

Carbon dioxide was absorbed into water‐in‐oil (w/o) emulsion composed of aqueous diethanolamine (DEA) droplets as a dispersed phase and benzene solutions of polybutene (PB) and polyisobutylene (PIB) as a continuous phase in a flat‐stirred vessel to investigate the effect of non‐Newtonian rheological behavior on the rate of chemical absorption of CO₂, where the reaction between CO₂ and DEA in the aqueous phase was assumed to be a pseudo‐first‐order reaction. The liquid‐side‐mass‐transfer coefficient, k _L, which was obtained from the dimensionless empirical equation containing the properties of pseudoplasticity of the non‐Newtonian liquid, was used to estimate the enhancement factor due to chemical reaction. It was expressed that PIB with elastic property accelerated the rate of chemical absorption of CO₂ by the comparison of k _L in the non‐Newtonian liquid with that in the Newtonian liquid.

Keywords:

• Chemical absorption
• Carbon dioxide
• Emulsion
• DEA
• Non‐Newtonian liquid

Acknowledgments

This work was supported by grant no. (2000‐230700‐002‐3) from the Basic Research Program of the Korea Science and Engineering Foundation (KOSEF), Brain Korea 21 Project in 2003, and Busan Brain 21 Program.