KINETICS AND ABSORPTION RATE OF CO₂ INTO PARTIALLY CARBONATED AMMONIA SOLUTIONS

Abstract

In this research, kinetics and absorption rate of CO₂ were studied using partially carbonated ammonia solutions. A correlation was proposed to calculate CO₂ absorption rate based on two dimensionless parameters: conversion film parameter and carbonation ratio. Absorption rate experiments have been performed employing a laboratory absorption packed column. More than 60 items of experimental data were used for obtaining the correlation parameters. In the experiments, total ammonia concentration range was 30 to 750 (mol · m⁻³), carbonation ratio range was 0.22 to 0.785, and CO₂ partial pressure in the gas mixture was 10, 14, or 18 (kPa). A comparison of the predictions indicated that the proposed correlation was more accurate than other correlations reported in the literature.

Keywords:

• Absorption rate
• Carbon dioxide
• Carbonation ratio
• Conversion film parameter
• Partially carbonated ammonia