Experimental investigation of carbon dioxide absorption using aqueous solution of 2-(Isopropylamino)ethanol and N-Methyldiethanolamine
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1Department of Chemical Engineering, caspian Faculty of Engineering, College of Engineering, University of Tehran, Tehran, Iran
2Institute of Petroleum Engineering, Faculty of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
Today, global warming and rising earth's temperature are a major environmental issue. Among the greenhouse gases, CO2 contributes to global warming effectively. Many new methods have been introduced to reduce or prevent CO2 emmision to the environment. One of the most commonly used technologies for CO2 capture processes is chemical absorption using aqueous amine solutions. In this study, the solubility of CO2 in amine solutions of 2-Isopropylaminoethanol (IPAE) and N-Methyldiethanolamine (MDEA) and their mixtures is investigated. The experiments were carried out using 12.5 wt. % MDEA+2.5 wt. % IPAE (as pure or mixed solvents) at the temperature range of 303.15-333.15 K and pressures range of 117.62- 634.59 kPa. The results showed that MDEA has a high absorption capacity, and IPAE has higher absorption rate . The heat of CO2 absorption was calculated for the mixture using the Clausius-Clapeyron equation. It was observed that the addition of 2.5 wt. % IPAE to MDEA results in a significant increase in reaction rate and reduce heat of absorption.