Selective sulfur dioxide adsorbents prepared from designed dispersions of groups IA and IIA metal oxides on alumina
- Georgia Institute of Technology, Atlanta, GA (United States)
- Clark Atlanta Univ., GA (United States); and others
Supported M(I)/alumina and M(II)/alumina adsorbents were prepared using M{sup n+}(acac){sub n} as the precursor. These materials may be decomposed by careful heating to create dispersions of M{sup n+}O{sub n/2}/alumina which are SO{sub 2} adsorbents. These adsorbents have been characterized by elemental analyses, diffuse reflectance infrared Fourier transform analysis spectroscopy, SO{sub 2} adsorption capacity, and powder X-ray diffraction. The MgO/alumina prepared from Mg(acac){sub 2}{center_dot}2H{sub 2}O shows high dispersion of Mg species which are stable against sintering even when calcined to 500{degrees}C. The incremental SO{sub 2} sorption capacity of this material shows nearly 1 mol SO{sub 2}/mol Mg{sup 2+} in the sample. The sample prepared from Li(acac) shows more SO{sub 2} adsorption than the MgO/alumina for loadings <150 {mu}mol/g alumina. However, the LiO/alumina samples show low incremental adsorption of SO{sub 2} per mol of Li ion (0.12 mol/mol) at metal loadings greater than 150 {mu}mol/g alumina. These results are discussed in the framework of ensemble theory in the light of the solution chemistry of the metal acetylacetonates. 30 refs., 13 figs.
- DOE Contract Number:
- FG22-90PC90292
- OSTI ID:
- 508471
- Journal Information:
- Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 1 Vol. 163; ISSN JCTLA5; ISSN 0021-9517
- Country of Publication:
- United States
- Language:
- English
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