Role of Ceria in the Design of Composite Materials for Elemental Mercury Removal.
Deshetti JampaiahAnastasios ChalkidisYlias M SabriNedaossadat MirzadehPublished in: Chemical record (New York, N.Y.) (2018)
The necessity to drastically act against mercury pollution has been emphatically addressed by the United Nations. Coal-fired power plants contribute a great deal to the anthropogenic emissions; therefore, numerous sorbents/catalysts have been developed to remove elemental mercury (Hg0 ) from flue gases. Among them, ceria (CeO2 ) has attracted significant interest, due to its reversible Ce3+ /Ce4+ redox pair, surface-bound defects and acid-base properties. The removal efficiency of Hg0 vapor depends among others, on the flue gas composition and temperature. CeO2 can be incorporated into known materials in such a way that the abatement process can be effective at different operating conditions. Hence, the scope of this account is to discuss the role of CeO2 as a promoter, active phase and support in the design of composite Hg0 sorbents/catalysts. The elucidation of each of these roles would allow the integration of CeO2 advantageous characteristics to such degree, that tailor-made environmental solution to complex issues can be provided within a broader application scope. Besides, it would offer invaluable input to theoretical calculations that could enable the materials screening and engineering at a low cost and with high accuracy.
Keyphrases
- low cost
- heavy metals
- fluorescent probe
- highly efficient
- particulate matter
- aqueous solution
- living cells
- dna methylation
- gene expression
- risk assessment
- transcription factor
- solid phase extraction
- density functional theory
- molecular dynamics
- transition metal
- health risk assessment
- life cycle
- energy transfer
- drinking water
- high resolution
- mass spectrometry
- air pollution
- monte carlo
- carbon dioxide