CO2 sequestration in peridotites - experimental carbonation of olivine and pyroxene

橄榄岩中的 CO2 封存 - 橄榄石和辉石的实验碳化

• 批准号: 192289996
• 负责人: Professor Dr. Andrew Putnis
• 金额: --
• 依托单位: Institut für Mineralogie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/192289996?language=en
• 关键词: CO2; sequestration; peridotites; experimental; carbonation

Reacting carbonated aqueous solutions with ultramafic rock formations to produce stable carbonate minerals is one of the most promising schemes for the long-term sequestration of carbon dioxide. Peridotite has been proposed as a starting material for these schemes due to its high magnesium and iron content in the minerals olivine and orthopyroxene, as well as calcium content in diopside. However, changes in the reaction conditions dramatically alter the phases precipitated from the reactions of the peridotite minerals, and this has important consequences for the progression of the carbonation process. Although most carbonation studies have focused on olivine carbonation reactions, little is known about the role of pyroxene on the carbonation process. Therefore, the aim of this project is to conduct an in-depth study of olivine and pyroxene replacement at different conditions and the effect on the formation of secondary phases. The reactions will be studied both in-situ and ex-situ using a wide range of analytical techniques to help constrain the geochemical models of carbon sequestration schemes.

碳酸盐水溶液与超镁铁岩地层反应生成稳定的碳酸盐矿物是长期封存二氧化碳最有前途的方案之一。由于橄榄石和斜方辉石中的镁和铁含量高，透辉石中的钙含量也高，因此橄榄岩被提议作为这些方案的起始材料。然而，在反应条件的变化显着改变相沉淀的橄榄岩矿物的反应，这对碳酸化过程的进展具有重要的后果。虽然大多数碳酸化研究都集中在橄榄石碳酸化反应，很少有人知道的作用，辉石的碳酸化过程。因此，本项目的目的是深入研究橄榄石和辉石在不同条件下的交代作用及其对次生相形成的影响。将使用各种分析技术对这些反应进行原位和非原位研究，以帮助限制碳固存计划的地球化学模型。