Issue 82, 2014

Use of one-pot wet gel or precursor preparation and supercritical drying procedure for development of a high-performance CO2 sorbent

Abstract

The objective of this research was to develop a new high-performance CO2 sorbent with a simple method. A new CO2 aerogel sorbent was synthesized by using one-pot wet gel or sorbent precursor preparation, and supercritical drying (SCD). The performance of the aerogel sorbent prepared with SCD, A-SCD, is much better than that prepared with ambient pressure drying (APD). The highest CO2 sorption capacity achieved with the new sorbent in 1% CO2 flow stream within 20 min is 4.51 mmol g−1, much higher than its state-of-art counterparts even with a 10% CO2 gas mixture which is favorable to increase in CO2 sorption capacity of any given sorbent. According to XPS data, the theoretical equilibrium CO2 sorption capacity of the A-SCD is 7.99 mmol g−1. The characterization results of N2 adsorption/desorption, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and zeta potential measurements used for the first time in CO2 research demonstrate that the pore structure and surface N concentration of the sorbent are significantly improved because of the use of SCD. The sorbent preparation method is inspiring and its resulting sorbent is exceptional in capacity and regenerability.

Graphical abstract: Use of one-pot wet gel or precursor preparation and supercritical drying procedure for development of a high-performance CO2 sorbent

Article information

Article type
Paper
Submitted
15 Jul 2014
Accepted
04 Sep 2014
First published
05 Sep 2014

RSC Adv., 2014,4, 43448-43453

Use of one-pot wet gel or precursor preparation and supercritical drying procedure for development of a high-performance CO2 sorbent

Y. Kong, G. Jiang, M. Fan, X. Shen and S. Cui, RSC Adv., 2014, 4, 43448 DOI: 10.1039/C4RA07120D

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