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Issue 4, 2012
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A solid molecular basket sorbent for CO2 capture from gas streams with low CO2 concentration under ambient conditions

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Abstract

In this paper, a solid molecular basket sorbent, 50 wt% PEI/SBA-15, was studied for CO2 capture from gas streams with low CO2 concentration under ambient conditions. The sorbent was able to effectively and selectively capture CO2 from a gas stream containing 1% CO2 at 75 °C, with a breakthrough and saturation capacity of 63.1 and 66.7 mg g−1, respectively, and a selectivity of 14 for CO2/CO and 185 for CO2/Ar. The sorption performance of the sorbent was influenced greatly by the operating temperature. The CO2-TPD study showed that the sorbent could be regenerated under mild conditions (50–110 °C) and was stable in the cyclic operations for at least 20 cycles. Furthermore, the possibility for CO2 capture from air using the PEI/SBA-15 sorbent was studied by FTIR and proved by TPD. A capacity of 22.5 mg g−1 was attained at 75 °C via a TPD method using a simulated air with 400 ppmv CO2 in N2.

Graphical abstract: A solid molecular basket sorbent for CO2 capture from gas streams with low CO2 concentration under ambient conditions

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Article information


Submitted
12 Aug 2011
Accepted
17 Nov 2011
First published
18 Nov 2011

Phys. Chem. Chem. Phys., 2012,14, 1485-1492
Article type
Paper

A solid molecular basket sorbent for CO2 capture from gas streams with low CO2 concentration under ambient conditions

X. Wang, X. Ma, V. Schwartz, J. C. Clark, S. H. Overbury, S. Zhao, X. Xu and C. Song, Phys. Chem. Chem. Phys., 2012, 14, 1485
DOI: 10.1039/C1CP23366A

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