Quaternized Chitosan/PVA Aerogels for Reversible CO2 Capture from Ambient Air

Juzheng SONG, Jie LIU, Wei ZHAO, Yan CHEN, Hang XIAO, Xiaoyang SHI, Yilun LIU*, Xi CHEN

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

86 Citations (Scopus)

Abstract

Developing inexpensive and highly efficient CO2 air capture technologies is an important solution for solving the greenhouse problem. In this work, we used the low-cost quaternized chitosan (QCS)/poly(vinyl alcohol) (PVA) hybrid aerogels with quaternary ammonium groups and hydroxide ions to reversibly capture CO2 from ambient air by humidity swing. The CO2 capture capacity and adsorption rate of the aerogels were investigated over the temperature range 10-30 °C. The CO2 capture capacity of the aerogels was measured to be about 0.18 mmol/g, which is 38% higher than the state-of-the-art commercial membrane. In addition, we proposed a modified pseudo-first-order kinetic model considering both the CO2 adsorption and the H2O desorption, which describes the experimental results very well. For the first time, the moisture-swing CO2 adsorbent is built by low-cost biomass material, which opens up a new approach for the design of the moisture-swing CO2 adsorbent.

Original languageEnglish
Pages (from-to)4941-4948
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume57
Issue number14
Early online date21 Mar 2018
DOIs
Publication statusPublished - 11 Apr 2018
Externally publishedYes

Bibliographical note

Funding Information:
Y.L. acknowledges support from the National Natural Science Foundation of China (No. 11572239). X.C. acknowledges support from the National Natural Science Foundation of China (Nos. 11372241 and 11572238), ARPA-E (DEAR0000396), and AFOSR (FA9550-12-1-0159).

Publisher Copyright:
© 2018 American Chemical Society.

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