Production of magnesium hydroxide from magnesium silicate for the purpose of CO₂ mineralization - Part 2: Mg extraction modeling and application to different Mg silicate rocks

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• 作者：Experience Nduagu^a ; Thomas Bj&ouml ; rkl&ouml ; f^a ; ¹ ; Johan Fagerlund^a ; Ermei Mä ; kilä ; ^b ; Jarno Salonen^b ; Hans Geerlings^c ; ^d ; Ron Zevenhoven^a ; ^{ron.zevenhoven@abo.fi}
• 关键词：Mineral carbonation ; Mg-silicate ; Magnesium hydroxide ; Ammonium sulfate ; Magnesium extraction ; Precipitation
• 刊名：Minerals Engineering
• 出版年：2012
• 期刊代码：130_08926875
• 类别：et
• 出版时间：April, 2012
• 卷：30
• 期：Complete
• 页码：87-94
• 文件大小：1017 K

摘要

Mineral carbonation of Mg silicates via a gas/solid carbonation of magnesium hydroxide, Mg(OH)₂ in a fluidized bed (FB) reactor process route is the most actively investigated route of carbon capture and storage by CO₂ mineralization (CCS) research in Finland. This paper reports Mg extraction behavior and production of magnesium hydroxide, Mg(OH)₂ from different Mg-silicate rocks from worldwide locations (Finland, Lithuania, Australia and Norway). Magnesium hydroxide, the reactive material for gas/solid mineralization of CO₂ can be produced from different Mg-silicate minerals via a staged solid/solid reaction with ammonium sulfate (AS) salt followed by precipitation in aqueous ammonia solution. A comparison is made for five different minerals. The kinetics of Mg extraction from Mg-silicate minerals and the possible effects of iron by-products on reactivity and kinetics were studied and modeled as well.