Absorbent for the removal of carbon dioxide in hollow fiber membrane contactor

摘要

PURPOSE: Provided are a carbon dioxide absorbent for a hollow fiber membrane contactor and an absorbing-desorbing hybrid system for separating carbon dioxide which show higher absorption rate and gas-treating amount than that of the conventional ones and stabilize physical and chemical properties of the hollow fiber membrane using a highly viscous aqueous solution of triethanol amine. CONSTITUTION: The carbon dioxide absorbent for a hollow fiber membrane contactor is an aqueous solution of alcohol amine containing 5-30 wt.% of trialcohol amine and 1-5 wt.% of mono alcohol amine. The absorbing-desorbing hybrid system for separating carbon dioxide by absorbing carbon dioxide from mixed gases and desorbing the absorbed carbon dioxide is characterized in that a polypropylene or polyvinylidene difluoride hollow fiber contactor is mounted thereon as an absorption module and the absorption module absorbs the carbon dioxide by contacting the carbon dioxide absorbent for the hollow fiber membrane contactor with the mixed gases.