Experimental study on desorption for carbon dioxide absorbent rich liquid based on coke fountain phenomenon

Abstract

Abstract. The experimental study on desorption for carbon dioxide is based on the phenomenon that pouring mints into coke can form coke fountain. In this study, the commonly used liquid monoethanolamine (MEA) was assumed as the absorbent for carbon dioxide, then the mint and its main compositions such as glucose, menthol, Arabic gum, gellan gum and Custer sugar were added into the absorbent rich liquid respectively. In addition, for studying the influence of the physical structure of the matter, chalk powder and activated carbon were also added separately. Under specific experimental conditions and different temperature, the effect on the desorption rate of different compositions and different materials were compared, through the determination of carbon dioxide desorption quantity in absorbent liquid. The results showed that the mint could effectively accelerate the desorption of carbon dioxide from the absorbing liquid rich, the main contributor is glucose. Contrasting the desorption results of mints ,chalk powder and activated carbon, it showed that physical structure of the carbon dioxide on the surface of the material also had great effect on the desorption rate, in addition to the influence of chemical composition.