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- Title
Fluidity comparison of biomass-derived activated carbon and TiO(OH)2 and its improving toward promoted low-temperature CO2 capture in gaseous medium.
- Authors
Asgharizadeh, Kimia; Tahmasebpoor, Maryam; Azimi, Babak; Imani, Mehri
- Abstract
Biowaste-derived activated carbons (ACs) and TiO(OH) 2 are considered promising materials for effective CO 2 capture. TiO(OH) 2 has not been employed in gas phase adsorption process; moreover, the comparison of fluidization of these materials had not been investigated. Hence, this study not only did evaluate the CO 2 adsorption performance of both synthetic TiO(OH) 2 and biomass-derived AC, but also assessed their fluidity aimed to implement at pilot scales. The samples were examined using XRD, BET, SEM, EDX, FTIR, and TGA techniques. The adsorption of the adsorbents was evaluated through TGA under several conditions. The AC demonstrated an average CO 2 capture capacity of 3.54 mmol/g, surpassing that of the TiO(OH) 2 (0.971 mmol/g) during three successive cycles at 25/120 ℃ under a CO 2 /N 2 flow of 90/10 vol% and 1 bar. Adding 5 wt% of auxiliary SiO 2 nanoparticles enhanced bed expansion of AC and TiO(OH) 2 by 1.83 and 1.5 times respectively, due to dwindling interparticle cohesive interactions. [Display omitted] • Biomass-derived activated carbon and TiO(OH) 2 were synthesized as the CO 2 adsorbents. • Prepared adsorbents were applied into CO 2 adsorption/desorption cycles at low temperatures. • Adsorbents' nature extraordinarily affects their CO 2 capture and fluidization performance. • Samples' fluidity was greatly improved by employing hydrophobic SiO 2 nanopowder.
- Subjects
CARBON sequestration; ACTIVATED carbon; GAS absorption &; adsorption; CARBON dioxide; SORBENTS; CARBON dioxide adsorption
- Publication
Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A, 2024, Vol 202, p23
- ISSN
0263-8762
- Publication type
Article
- DOI
10.1016/j.cherd.2023.12.019