(667a) CO2/H2O Sorption Behaviour of Nickel Nanowires Immobilized in Silica Aerogels for the CO2 Hydration Reaction

The rise of carbon dioxide (CO₂) in atmosphere is a major factor responsible for increasing global surface temperature. A possible solution to mitigate climate change is CO₂ capture, storage and utilization (CCSU). CCSU could be useful for controlling and moderating anthropogenic emissions of greenhouse gases.

Several technologies have been considered to remove CO₂ from flue gas streams including absorption, adsorption, membrane separations and cryogenic distillations. Another promising CCSU technology is removing CO₂ by using the CO₂ hydration reaction (CHR) which works well in the presence of catalyst such as carbonic anhydrase (CA). Other promising catalysts are nickel nanoparticles (NiNPs) developed by Siller et al. (17-19) which have catalytic activity to accelerate CHR. They are also stable in water based environments. Their catalytic activity is affected by surface area, surface structure of different dimensionalities of nanomaterials. In this work we study immobilized nickel nanowires (NiNWs) as 1D nanomaterials in SiO₂ aerogels as a heterogeneous catalyst for the CHR and compared them with NiNPs as 0D nanomaterials. Data for the differences in catalytic activities for CHR in a vapor phase when two different forms of nickel nanomaterials (NiNPs and NiNWs) are immobilized in silica aerogels will be presented. CO₂/H₂O co-sorption measurements were employed to study the catalytic activity. Vacuum Dynamic Vapor Sorption Analyzer (DVS Vacuum) was employed to study CO₂/H₂O adsorption-desorption kinetics and isotherms.

References:

1. Betts, R. A.; Jones, C. D.; Knight, J. R.; Keeling, R. F.; Kennedy, 411
2. J. J. El Niño and a record CO₂ rise. Nat. Clim. Change 2016, 6, 806-810
3. Minju, N.; Abhilash, P.; Nair, B. N.; Mohamed, A. P.; 421 Ananthakumar, S. Amine impregnated porous silica gel sorbents synthesized from water-glass precursors for CO₂ capturing. Chem. Eng. J. 2015, 269, 335−342
4. Kong, Y.; Shen, X.; Fan, M.; Yang, M.; Cui, S. Dynamic capture of low-concentration CO₂ on amine hybrid silsesquioxane aerogel. Chem.Eng. J. 2016, 283, 1059−1068
5. Zhang, W.; Liu, H.; Sun, C.; Drage, T. C.; Snape, C. E. Capturing CO2 from ambient air using a polyethyleneimine-silica adsorbent in fluidized beds. Chem. Eng. J. 2014, 116, 306−316
6. SÌŒiller, L.; Bhaduri, G. A. Carbon Capture, 2013. 465
7. Bhaduri, G. A.; Šiller, L. Nickel nanoparticles catalyse reversible hydration of carbon dioxide for mineralization carbon capture and storage. Catal. Sci. Technol. 2013, 3, 1234−1239
8. Bhaduri, G. A.; Alamiry, M. A. H.; Šiller, L. Nickel nanoparticles for enhancing carbon capture. J. Nanomater. 2015, 2015, 1−13.
9. Khalil T. Hassan, Jiabin Wang, Xiao Han, Jon J. Sharp, Gaurav A. Bhaduri, Vladimir Martis, and Lidija Å iller Catalytic Performance of Nickel Nanowires Immobilized in Silica Aerogels for the CO₂ Hydration Reaction, ACS Omega 2019, 4, 1, 1824-1830