Konjac glucomannan/cellulose nanofibers composite aerogel supported HKUST-1 for CO2 adsorption

Jinqiang Sun; Mengge Shang; Minna Zhang; Shimo Yu; Zhipeng Yuan; Xibin Yi; Serguei Filatov; Jing Zhang

doi:10.1016/j.carbpol.2022.119720

Konjac glucomannan/cellulose nanofibers composite aerogel supported HKUST-1 for CO₂ adsorption

Carbohydr Polym. 2022 Oct 1:293:119720. doi: 10.1016/j.carbpol.2022.119720. Epub 2022 Jun 9.

Authors

Jinqiang Sun¹, Mengge Shang¹, Minna Zhang¹, Shimo Yu¹, Zhipeng Yuan¹, Xibin Yi¹, Serguei Filatov², Jing Zhang³

Affiliations

¹ Shandong Key Laboratory for Special Silicon-containing Material, Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, PR China.
² Laboratory of Hydrogen Energy, Institute of Heat and Mass Transfer of the National Academy of Sciences of Belarus, Minsk 220072, Belarus.
³ Shandong Key Laboratory for Special Silicon-containing Material, Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, PR China. Electronic address: zhangjing@sdas.org.

PMID: 35798419
DOI: 10.1016/j.carbpol.2022.119720

Abstract

Biomass aerogels are attractive in various applications owing to their inherent advantages of renewability, biodegradability and eco-friendly. Herein, a novel composite aerogel of konjac glucomannan (KGM)/TEMPO-oxidized cellulose nanofibers (TOCNF)@HKUST-1 (KTA@HKUST-1) is prepared through a facile vacuum impregnation method combined with the directional freeze-drying process, which using KGM and TOCNF as raw materials. The structural analyses disclose that the KTA@HKUST-1 has a hierarchical porosity, in which HKUST-1 can provide micropores for adsorption, while the meso-/macropores from KTA act as high-speed channels to improve diffusion and mass transfer rate to transport CO₂ components into the micropores of HKUST-1. The experiment results of KTA@HKUST-1-10 (KTA@H10) show that the CO₂ adsorption capacity can reach 3.50 mmol·g^-1 at 1 bar and 298 K, and the adsorption capacity retention rate as high as 91.43% after 7 cycles. In addition, the CO₂/N₂ adsorption selectivity of KTA@H10 can reach 18.42, which has an excellent potential for selective CO₂ adsorption.

Keywords: Aerogel; CO(2) adsorption; Cellulose; HKUST-1; Hierarchical porosity; Konjac glucomannan.

MeSH terms

Adsorption
Carbon Dioxide
Cellulose* / chemistry
Mannans
Metal-Organic Frameworks
Nanofibers* / chemistry

Substances

Mannans
Metal-Organic Frameworks
bis(1,3,5-benzenetricarboxylate)tricopper(II)
Carbon Dioxide
(1-6)-alpha-glucomannan
Cellulose