Carbon dioxide sequestration in cement kiln dust through mineral carbonation

Deborah N Huntzinger, John S. Gierke, S. Komar Kawatra, Timothy C. Eisele, Lawrence L. Sutter

Research output: Contribution to journalArticle

150 Citations (Scopus)

Abstract

Carbon sequestration through the formation of carbonates is a potential means to reduce CO 2 emissions. Alkaline industrial solid wastes typically have high mass fractions of reactive oxides that may not require preprocessing, making them an attractive source material for mineral carbonation The degree of mineral carbonation achievable in cement kiln dust (CKD) under ambient temperatures and pressures was examined through a series of batch and column experiments. The overall extent and potential mechanisms and rate behavior of the carbonation process were assessed through a complementary set of analytical and empirical methods, including mass change, thermal analysis, and X-ray diffraction. The carbonation reactions were carried out primarily through the reaction of CO 2 with Ca(OH) 2, and CaCO 3 was observed as the predominant carbonation product. A sequestration extent of over 60% was observed within 8 h of reaction without any modifications to the waste. Sequestration appears to follow unreacted core model theory where reaction kinetics are controlled by a first-order rate constant at early times; however, as carbonation progresses, the kinetics of the reaction are attenuated by the extent of the reaction due to diffusion control, with the extent of conversion never reaching completion.

Original languageEnglish (US)
Pages (from-to)1986-1992
Number of pages7
JournalEnvironmental Science and Technology
Volume43
Issue number6
DOIs
StatePublished - Mar 15 2009
Externally publishedYes

Fingerprint

Carbonation
Kilns
Carbon Dioxide
carbon sequestration
Minerals
Dust
Cements
cement
dust
reaction kinetics
mineral
industrial waste
solid waste
X-ray diffraction
oxide
Carbon Monoxide
carbonate
kinetics
experiment
temperature

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Carbon dioxide sequestration in cement kiln dust through mineral carbonation. / Huntzinger, Deborah N; Gierke, John S.; Kawatra, S. Komar; Eisele, Timothy C.; Sutter, Lawrence L.

In: Environmental Science and Technology, Vol. 43, No. 6, 15.03.2009, p. 1986-1992.

Research output: Contribution to journalArticle

Huntzinger, Deborah N ; Gierke, John S. ; Kawatra, S. Komar ; Eisele, Timothy C. ; Sutter, Lawrence L. / Carbon dioxide sequestration in cement kiln dust through mineral carbonation. In: Environmental Science and Technology. 2009 ; Vol. 43, No. 6. pp. 1986-1992.
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