• Title/Summary/Keyword: high thermochemical treatmen

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High Temperature Thermochemical Treatment and Characterization of Sepiolite for $CO_2$ Storage ($CO_2$ 저장용 Sepiolite의 고온 열화학처리 및 특성평가)

  • Choi, Weon-Kyung;Cho, Tae-Hwan
    • Journal of Hydrogen and New Energy
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    • v.17 no.4
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    • pp.425-433
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    • 2006
  • Sepiolite was selected as a mineral carbonation candidate ore for carbon dioxide sequestration. Carbonation salt formation from alkaline earth metal ingredient needs to dehydroxylation of sepiolite at high temperature. An evident dehydroxylation was observed over $800^{\circ}C$ and the variations of sepiolite characteristics after high temperature treatment was synthetically evaluated. Remarkable weight loss were measured after high temperature thermochemical reaction then crystallographic and spectroscopic changes were analyzed. The resulted alkaline earth metal oxides could explained by dehydroxylation based on thermochemical reaction.