Carboxymethyl cellulose/polyvinyl alcohol composite aerogel supported beta molecular sieve for CH4 adsorption and storage

Jinqiang Sun; Jing Zhang; Xiaoqian Peng; Xu Zhang; Zhipeng Yuan; Xiaochan Liu; Sijia Liu; Xinfu Zhao; Shimo Yu; Xibin Yi

doi:10.1016/j.carbpol.2023.121246

Carboxymethyl cellulose/polyvinyl alcohol composite aerogel supported beta molecular sieve for CH₄ adsorption and storage

Carbohydr Polym. 2023 Dec 1:321:121246. doi: 10.1016/j.carbpol.2023.121246. Epub 2023 Jul 31.

Authors

Jinqiang Sun¹, Jing Zhang², Xiaoqian Peng¹, Xu Zhang¹, Zhipeng Yuan¹, Xiaochan Liu¹, Sijia Liu¹, Xinfu Zhao¹, Shimo Yu¹, Xibin Yi³

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 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.
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: yixb@sdas.org.

PMID: 37739488
DOI: 10.1016/j.carbpol.2023.121246

Abstract

Biomass aerogel is attractive in various applications due to their renewable, biodegradable and eco-friendly advantages. Herein, a novel beta molecular sieve/carboxymethyl cellulose/polyvinyl alcohol composite aerogel (beta/CP) is prepared by direct mixing and directional freeze-drying as an efficient gas adsorbent with hierarchical porosity. The beta molecular sieve is uniformly dispersed in the three-dimensional skeleton of the aerogel. By adjusting the loading mass of the beta molecular sieve to constitute a reasonable porosity and pore size distribution, the synergistic effect between pore structures of different scales improves the adsorption performance. The experiment results of beta/CP-4 show that the CH₄ adsorption capacity can reach 60.33 cm³/g at 298 K and 100 bar, which is almost the same as that of the pure beta molecular sieve (62.09 cm³/g). The strong interaction between the aerogel and it prevents the molecular sieve agglomeration, improves the pore utilization, and also reduces the cost of using molecular sieve adsorbent. The above results indicate that the composite has good potential for application in the field of CH₄ storage.

Keywords: Aerogel; Beta molecular sieve; CH(4) adsorption; Carboxymethyl cellulose; Hierarchical porosity; Polyvinyl alcohol.