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

Xiaoxing Wang, Xiaoliang Ma, Viviane Schwartz, Jason C. Clark, Steven H. Overbury, Shuqi Zhao, Xiaochun Xu, Chunshan Song

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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% CO 2 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 CO 2/CO and 185 for CO2/Ar. The sorption performance of the sorbent was influenced greatly by the operating temperature. The CO 2-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.

Original languageEnglish (US)
Pages (from-to)1485-1492
Number of pages8
JournalPhysical Chemistry Chemical Physics
Volume14
Issue number4
DOIs
StatePublished - Jan 28 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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