Carbon capture efficiency of membrane gas absorption was improved using a nearly superhydrophobic membrane. This membrane, polyvinylidene fluoride (PVDF) membrane, was blended with TiO2 nanoparticles and post-modified with octadecyltrichloro silane to reduce wetting. Wetting reduction is important to minimize mass transfer resistance in membrane pores during carbon capture. The hydrophilic TiO2 nanoparticles reduced membrane pore size and hydrophobicity in dual bath coagulation, but they offered active sites for silane modification as proven by Fourier-transform infrared spectra to achieve a water contact angle up to 148.8o. A non-wetting surface near to Cassie- Baxter state was formed due to the nano-roughness of TiO2 nanoparticles and hydrophobic functional groups of silane. The modified membrane showed higher CO2 absorption flux in comparison to the neat PVDF membrane, as much as 114% improvement. The modified membrane also achieved faster carbon capture into water. Furthermore, PVDF and PVDF/TiO2 membranes modified with octadecyltrichloro silane in ethanol (volume ratio of 5 : 50) were less affected by NaOH absorbent, displaying great potential for carbon capture and storage using alkaline waste.
International Energy Agency, https://www.iea.org/geco/.html, (accessed 16 August 2019).
Equinor, https://www.equinor.com/en/news/2019-06-12-sleipner-co2-storage-data.html, (accessed 16 August 2019).
NRG, https://www.nrg.com/case-studies/petra-nova.html, (accessed 16 August 2019).
Kader BA, https://gulfnews.com/business/energy/abu-dhabis-carbon- aptureproject-on-track-1.1458076.html, (accessed 16 August 2019).
Tanaka Y, Sawada Y, Tanase D, Tanaka J, Shiomi S, Kasukawa T, Energy Procedia, 114, 5836, 2017
Department of Energy, https://www.energy.gov/fe/articles/doeannounces-major-milestone-reached-illinois-industrial-ccs-project, (accessed 16 August 2019).
Mistry RJ, Saxena M, Ray P, Singh PS, J. Appl. Polym. Sci., 135, 46043, 2018
Agency for Toxic Substances and Disease Registry, https://www.health.pa.gov/topics/Documents/Environmental%20Health/PFAS%20Exposure%20Assessment%20Technical%20Tools.pdf.html, (accessed 16 August 2019).
Bai H, Wang X, Zhou Y, Zhang L, Pro. Nat. Sci. Mater., 22, 250, 2012
Collazzo GC, Jahn SL, Carreno N, Foletto EL, Braz. J. Chem. Eng., 28, 265, 2011
Coates J, in Encyclopedia of analytical chemistry, John Wiley & Sons, Chichester (2006).
Mansourizadeh A, Ismail AF, Int. J. Greenh. Gas Con., 5, 374, 2011
Rezaei M, Ismail AF, Hashemifard SA, Bakeri G, Matsuura T, Int. J. Greenh. Gas Con., 26, 147, 2014