Investigation of Biocatalytic Absorption and Ultrasound-Assisted Desorption Performance of CO2 Capture

The CO2 absorption-desorption performance of non-aqueous solutions comprising a sterically hindered amine system (2-amino-2-ethyl-1,3-propanediol (AEPD): 1-hexanol) was investigated in gas-liquid stirred cell reactor under sequential cycles. absorption capacity and initial rate were calculated for different concentrations AEPD: 1-hexanol at 303 K 2 bar absolute pressure. Increasing the amount AEPD increased capacity. biocatalytic effect constant carbonic anhydrase (CA) on also investigated, CA enzyme found to increase total absorbed CO2. loading activated 0.88 0.97 mol CO2/mol AEPD, respectively. desorption experiments performed sequences same experimental set-up 363 1.1 N2 ultrasonic irradiation 0.1 g/L catalyzed investigated. It observed that assistance shortened time enhanced rate. Furthermore, effectiveness regeneration, reusability, loss 1-hexanol, presence absence CA, analyzed by Fourier transform infrared spectrometry.