Title: Supercritical drying: a promising technique on synthesis of sorbent for CO2 capture

 

Author: Yong Kong; Xiaodong Shen; Sheng Cui; Maohong Fan

 

Addresses:
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China; Department of Chemical and Petroleum Engineering, University of Wyoming, Laramie, WY 82071, USA; State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China; State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China; State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
Department of Chemical and Petroleum Engineering, University of Wyoming, Laramie, WY 82071, USA; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA

 

Journal: Int. J. of Global Warming, 2017 Vol.12, No.2, pp.228 - 241

 

Abstract: The objective of this paper is to present a new technique, supercritical drying (SCD), for CO2 capture, utilisation and storage (CCUS). To investigate the effect of drying methods on the structure and CO2 capture performance of an aerogel sorbent, amine hybrid silica aerogel (AHSA) was prepared by SCD and ambient pressure drying (APD). The characterisation results of N2 adsorption/desorption, scanning electron microscopy and X-ray photoelectron spectroscopy measurements demonstrate that the pore structure and surface amine content of the sorbent are significantly improved because of the use of SCD. The CO2 adsorption capacities of AHSA dried by SCD are much higher than that of AHSA dried by APD. The CO2 adsorption kinetics of the adsorbent under different conditions was also investigated. The results reveal that the sorbent preparation method is inspiring and its resulting sorbent is dynamic in low-concentration CO2 capture.

 

Keywords: CO2 capture; supercritical drying; aerogel; sorbent; adsorption.

 

DOI: http://dx.doi.org/10.1504/IJGW.2017.10005404

 

Available online 12 Jun 2017

 

 

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