Markedly improved CO2 capture efficiency and stability of gallium substituted hydrotalcites at elevated temperatures

Cafer T. Yavuz, Brian D. Shinall, Alexei V. Iretskii, Mark G. White, Tim Golden, Mert Atilhan, Peter C. Ford, Galen D. Stucky

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

A study was conducted to investigate improved CO2 capture efficiency and stability of gallium substituted hydrotalcites at elevated temperatures. Gallium substituted hydrotalcites (Ga-SHT) were prepared by a procedure slightly modified from the conventional hydrotalcite synthesis. Ga-SHT were customized by stirring a 1 g portion of the material in 50 mL of water containing 2.0 M potassium carbonate for 2 hours before removing the water at 70 °C under a slight vacuum. The SHTs were also converted into the CO2 adsorbents by calcining at 400 °C in an inert gas atmosphere. The CO2 experiments were conducted at 200 °C and the CO2 partial pressure was 0.7 atm. The CO2 adsorption capacities were obtained using a thermal gravimetric apparatus (TGA) to measure weight gain under a dry gas stream containing CO2 and an inert gas.
Original languageEnglish (US)
Pages (from-to)3473-3475
Number of pages3
JournalChemistry of Materials
Volume21
Issue number15
DOIs
StatePublished - Aug 11 2009
Externally publishedYes

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemical Engineering(all)
  • Chemistry(all)

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