High-Temperature Adsorption of Carbon Dioxide on Mixed Oxides Derived from Hydrotalcite-Like Compounds

Xiao Ping Wang, Jun Jie Yu, Jie Cheng, Zheng Ping Hao and Zhi Ping Xu (2008) High-Temperature Adsorption of Carbon Dioxide on Mixed Oxides Derived from Hydrotalcite-Like Compounds. Environmental Science & Technology, 42 2: 614-618. doi:10.1021/es072085a


Author Xiao Ping Wang
Jun Jie Yu
Jie Cheng
Zheng Ping Hao
Zhi Ping Xu
Title High-Temperature Adsorption of Carbon Dioxide on Mixed Oxides Derived from Hydrotalcite-Like Compounds
Journal name Environmental Science & Technology   Check publisher's open access policy
ISSN 0013-936X
Publication date 2008-01-15
Year available 2007
Sub-type Article (original research)
DOI 10.1021/es072085a
Volume 42
Issue 2
Start page 614
End page 618
Total pages 5
Editor Jerald Schnoor
Place of publication Washington , DC
Publisher American Chemical Society
Collection year 2008
Language eng
Subject C1
100708 Nanomaterials
859803 Management of Greenhouse Gas Emissions from Energy Activities (excl. Electricity Generation)
Formatted abstract
 Various XnY3−nAl-hydrotalcite-like compounds (HTlcs) were synthesized by the constant pH coprecipitation method with the (X2+ + Y2+)/Al3+ molar ratio fixed at 3.0. Well-mixed oxides XnY3−nAlO were derived from corresponding HTlcs precursors upon calcination. Physicochemical characterization with X-ray diffraction analysis, Fourier transform infrared spectroscopy, thermogravimetric analysis (TGA), and the Brunauer−Emmett−Teller equation indicates that the derived oxides are of either periclase or spinel phase, with an interparticle pore diameter of 9.6–15.4 nm. These oxides generally show a high CO2 adsorption capability at 350 °C. For example, CaCoAlO captures 1.39 mmol/g of CO2 (i.e., 6.12 wt %) from a gas mixture (8% CO2 in N2) at 350 °C and 1 atm in a fixed-bed reactor within 20 min. All other mixed oxides adsorb 0.87–1.28 mmol/g (3.83–5.63 wt %) of CO2. Therefore, these mixed oxides are potential cost-effective CO2 sorbents for environmental remediation. In addition, the CO2 adsorption behavior is well-described with the deactivation model. The species of CO2 formed on the sorbents are various carbonates, as revealed by in situ IR spectra as well as TGA.
Keyword Adsorption
Air Pollutants
Air Pollution
Aluminum Hydroxide
Carbon Dioxide
Q-Index Code C1
Q-Index Status Provisional Code
Additional Notes First published online 7/12/07 then in hard copy Jan 15th 2008. Should have been claimed in 2008 Collection. removed from 09HERDC

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Thu, 05 Mar 2009, 20:53:57 EST by Mrs Jennifer Brown on behalf of Aust Institute for Bioengineering & Nanotechnology