Premium
Integrated two‐stage adsorption for selective removal of CO 2 and SO 2 by amine‐functionalized SBA‐15
Author(s) -
Wei L.,
Gao Z.,
Wang Y.
Publication year - 2017
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.2108
Subject(s) - adsorption , flue gas , desorption , chemistry , scanning electron microscope , thermogravimetric analysis , nuclear chemistry , amine gas treating , x ray photoelectron spectroscopy , gravimetric analysis , chemical engineering , transmission electron microscopy , volume (thermodynamics) , analytical chemistry (journal) , materials science , chromatography , organic chemistry , nanotechnology , composite material , physics , quantum mechanics , engineering
A novel process for integrated two‐stage selective removal of CO 2 and SO 2 from a simulated flue gas by an adsorption method was developed. Triethylolamine (TEA)‐loaded SBA‐15 was selected as the SO 2 adsorbent, and tetraethylenepentamine (TEPA)‐loaded SBA‐15 was the CO 2 adsorbent. Scanning electron microscopy, transmission electron microscopy, thermal gravimetric analysis, N 2 adsorption/desorption, X‐ray photoelectron spectroscopy, and X‐ray diffraction techniques were used to characterize the properties of the adsorbents. The effects of the height–diameter ratio (H/D) of the adsorbent bed and operation temperature were tested for the removal of SO 2 . The results indicated that the pore volume and surface area of SBA‐15‐TEA‐50 and SBA‐15‐TEPA‐50 dropped with the increase of amine loading. SO 2 breakthrough adsorption capacity of SBA‐15‐TEA‐50 was 146.3 mg of SO 2 /(g of adsorbent). The integrated two‐stage removal experiment of SO 2 and CO 2 over SBA‐15‐TEA and SBA‐15‐TEPA showed that CO 2 and SO 2 in gas mixture can be removed in two stages, respectively. Regeneration experiment showed that both the SO 2 and CO 2 breakthrough capacity almost kept a constant in the multiple cycles, and the regeneration of integrated two‐stage system was stable. © 2017 Curtin University of Technology and John Wiley & Sons, Ltd.