Mesoporous cellular foams supported Fe 2.0SiW 12O 40: Synthesis, characterization and application to CO 2 sorption

Pankaj Sharma, Sang Do Park, Ki Tae Park, Jung Hoon Park, Cheol Yong Jang, Sung Chan Nam, Il Hyun Baek

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Solid adsorbents comprising 50, 70, and 90wt.% heteropolyacid Fe 2.0SiW 12O 40 (Fe-HPA) and mesoporous cellular foams (MCFs) have been synthesized by wetting impregnation. The adsorbents were characterized by various physicochemical, thermal and spectral techniques and the CO 2 adsorption capacity of the adsorbents were investigated. The structure of Fe-HPA on the surface of the support was confirmed by TEM, SAXS, XRD, SEM, FTIR, 29Si MAS NMR, and XPS. XPS of the Fe 2p 3/2, 2p 1/2, 3p and W 4f 7/2, 4f 5/2, 4d 5/2, 4d 3/2 confirmed the presence of typical Fe( 2+) and W( 6+) in the adsorbent, respectively. The adsorbents showed a very high adsorption capacity due to the chemisorption of CO 2. The CO 2 adsorption capacity of a 70wt.% Fe-HPA-MCF sample was 111.8mg/g-adsorbent at 25°C. This result indicated that the reported iron (Fe 2+) complex could be used as an efficient adsorbent for the separation of CO 2. The adsorbents displayed excellent CO 2 adsorption capacity and were thermally stable and recyclable.

Original languageEnglish
Pages (from-to)161-168
Number of pages8
JournalPowder Technology
Volume233
DOIs
StatePublished - Jan 2013

Keywords

  • CO adsorption
  • HPAs
  • MCFs
  • Silicotungstic acid
  • XPS

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