CO2 absorption using amine solution

Abstract

In this thesis research, a study was conducted to investigate the absorption of carbon dioxide using amine solution which is methyldiethanolamine (MDEA). Carbon dioxide (CO2) is a naturally occurring chemical compound consists of two oxygen atoms covalently bonded to a single carbon atom. Besides that, CO2 is toxic in higher concentrations, 1% of CO2 (10,000 ppm) may effect human being health . CO2 absorption system was applied in the gas absorption column by mixing the MDEA solution with 50L water in the tank. The concentration and flow rate of MDEA were monitored during the absorption process. The absorption of CO2 is higher at concentration 0.1 M MDEA compared to 0.01 M and 0.05 M MDEA. 0.1 M MDEA was absorbed about 0.77% of CO2 at flow rate 0.4 GPM. Moreover, 0.24% of CO2 was absorbed by 0.01 M MDEA at flow rate 1.2 GPM. The higher the flow rate of MDEA solution resulted on decrement of CO2 absorption. There are five flow rates being test in this study which are 0.4 GPM, 0.6 GPM, 0.8 GPM, 1.0 GPM and 1.2 GPM which contributed to 0.33% up to 0.77% of CO2 absorption respectively. This study clearly shows that, concentration and flow rate were important parameter to determine absorbed CO2.