Carbon dioxide removal in emulsion liquid membrane containing 2-amino-2-methyl-1-propanol /monoethanolamine

Absorption using aqueous alkanolamine is commonly used in industry to remove the carbon dioxide. However it has several weaknesses such as corrosion problem and low absorption rate. Emulsion liquid membrane is introduced as an alternatives method for CO2 absorption because it can reduce the corrosion problem and the formation water droplets creates large interfacial area for absorption to occur. 2-amino-2-methyl-1-propanol (AMP) and monoethanolamine (MEA) present in the aqueous phase in the form of aqueous droplets, surrounded by the organic solution to form water in oil (w/o) emulsion. In this study, effects of amines ratios and amine quantities, and emulsification time and speed on the ELM stability and CO2 absorption were investigated. The ELM was prepared by homogenizing the aqueous and the organic phases. AMP and MEA were added into sodium hydroxide (NaOH) solution to form aqueous solution, and kerosene and Span-80 were mixed to form the organic solution. The absorption study was carried out in rotating disc contactor (RDC) column. A mixture of 12 v% MEA, 4 v% AMP in 100 ml aqueous solution and 8 v% Span-80 in 100 ml organic phase has high stability and can remove 60% of CO2. The stability of the emulsion remained high even after the absorption. This study proved that ELM has the potential to remove CO2 by using only small amount of amines

Removal of carbon dioxide using emulsion liquid membrane containing n-methyldiethanolamine and piperazine in rotating disc contactor

Removal of carbon dioxide (CO2) becomes necessary in order to save the environment and to prevent problems in chemical process such as corrosion of pipeline and equipment, catalyst poisoning and freezing in the cryogenic equipment. Absorption of carbon dioxide in emulsion containing active extractant becomes an alternative method since the formation of emulsion reduces the corrosion problem. In addition, the droplets of amine provide large surface area for reaction to occur. In this study, the emulsion of liquid membrane that consist of extractant (N-Methyldiethanolamine) and piperazine were used to enhance the CO2 absorption rate. Piperazine was used because it had fast reaction rate with carbon dioxide and high capability or solubility for carbon dioxide absorption. This paper compares different emulsion liquid membrane formulation for CO2 removal using emulsion containing amine (N-Methyldiethanolamine) and piperazine. This study is based on the stability of the emulsion and CO2 absorption performance of the emulsion. The emulsion was prepared at different concentration of extractants. The CO2 absorption was carried in Rotating Disc Contactor (RDC) and Gas Chromatography (GC) was used to determine the amount of CO2 absorbed. From this research, emulsion containing 2 mL N-Methyldiethanolamine and 6 mL piperazine has the highest percentage of stability and CO2 removal