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Carbonation of Magnesium Silicate Minerals: An Experimental Study
Author(s) -
Jia Lufei,
Anthony Edward J.,
Lin Weigang,
Ruan Yuhong,
Gora Darius
Publication year - 2004
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450820617
Subject(s) - carbonation , silicate , silicate minerals , magnesium , mineral , carbonate , peridotite , mineralogy , carbonatation , chemistry , geochemistry , geology , mantle (geology) , organic chemistry
CO 2 sequestration by magnesium silicate mineral is the only known process that can permanently store CO 2 using a natural feedstock that exists in sufficient quantities to be used practically. Transporting large amounts of mineral over long distances is uneconomical. For Canada to benefit from such a process, identification of suitable Canadian magnesium silicate mineral deposits is crucial. Only carbonation under pressure in NaCl and NaCl/NaHCO 3 solutions results in high Mg conversions (40–80%). Among the minerals examined in this study, the serpentines reacted most easily, and peridotite was the most difficult to carbonate. Increasing carbonation pressure to very high levels reduced the degree of carbonation as hydrolysis reactions became competitive with the carbonation process.