Enhanced desulfurization performance of copper aerogel-based absorbents

Copper aerogel was employed as a sulfur absorbent to enhance desulfurization performance. The copper aerogel was synthesized using an ethanolic approach and dried by three different drying techniques of freeze drying, organic solvent sublimation drying with tert-butanol, and acetonitrile. The typica...

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Bibliographic Details
Published in:The Korean journal of chemical engineering 2023, 40(4), 277, pp.791-801
Main Authors: Yun, Jungwon, Kang, Dohyung, Ramkumar, Ramya, Kim, Dongjoon, Lee, Seung Jong, Yun, Yongseung, Kim, Woo Kyoung, Park, No-Kuk, Kim, Minkyu
Format: Article
Language:English
Subjects:
Acetonitrile
Aerogels
Biotechnology
Butanol
Catalysis
Chemistry
Chemistry and Materials Science
Copper
Copper oxides
Density functional theory
Desulfurizing
Freeze drying
Gaseous diffusion
Industrial Chemistry/Chemical Engineering
Low temperature
Materials Science
Reaction Engineering
Sorbents
Sublimation
Sulfur
화학공학
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Summary:Copper aerogel was employed as a sulfur absorbent to enhance desulfurization performance. The copper aerogel was synthesized using an ethanolic approach and dried by three different drying techniques of freeze drying, organic solvent sublimation drying with tert-butanol, and acetonitrile. The typical interconnecting and porous structure of the aerogel was clearly observed only for the aerogel sample made by freeze-drying. Further desulfurization tests showed that freeze-dried copper aerogel had the highest sulfur capacity (12 mgS/g-sorbent) at a low temperature of 200 °C. This enhancement was driven by two factors. 1) The interconnecting structure of copper aerogel weakens the gas diffusion resistance, which can prevent the gas from flowing the inside of sample thereby reducing the efficiency of absorbent. 2) The partially oxidized structure of Cu 2 O is thermodynamically active toward the desulfurization reaction, which was confirmed by density functional theory calculations. Overall, using copper aerogels with an interconnecting structure and Cu 2 O composition would be a novel approach to enhance desulfurization performance.
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-022-1317-7