Effect of SO 2 on CO 2 Capture Using Liquid-like Nanoparticle Organic Hybrid Materials
KAUST Grant NumberKUS-C1-018-02
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AbstractLiquid-like nanoparticle organic hybrid materials (NOHMs), consisting of silica nanoparticles with a grafted polymeric canopy, were synthesized. Previous work on NOHMs has revealed that CO2 capture behaviors in these hybrid materials can be tuned by modifying the structure of the polymeric canopy. Because SO2, which is another acidic gas found in flue gas, would also interact with NOHMs, this study was designed to investigate its effect on CO2 capture in NOHMs. In particular, CO2 capture capacities as well as swelling and CO2 packing behaviors of NOHMs were analyzed using thermogravimetric analyses and Raman and attenuated total reflectance (ATR) Fourier transform infrared (FTIR) spectroscopies before and after exposure of NOHMs to SO2. It was found that the SO2 absorption in NOHMs was only prominent at high SO2 levels (i.e., 3010 ppm; Ptot = 0.4 MPa) far exceeding the typical SO2 concentration in flue gas. As expected, the competitive absorption between SO2 and CO2 for the same absorption sites (i.e., ether and amine groups) resulted in a decreased CO2 capture capacity of NOHMs. The swelling of NOHMs was not notably affected by the presence of SO 2 within the given concentration range (Ptot = 0-0.68 MPa). On the other hand, SO2, owing to its Lewis acidic nature, interacted with the ether groups of the polymeric canopy and, thus, changed the CO2 packing behaviors in NOHMs. © 2013 American Chemical Society.
CitationLin K-YA, Petit C, Park A-HA (2013) Effect of SO 2 on CO 2 Capture Using Liquid-like Nanoparticle Organic Hybrid Materials . Energy Fuels 27: 4167–4174. Available: http://dx.doi.org/10.1021/ef400374q.
SponsorsThis publication was based on work supported by Award KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST). The authors are grateful to Dr. Youngjune Park for his help with the deconvolution of FTIR spectra.
PublisherAmerican Chemical Society (ACS)
JournalEnergy & Fuels