Simultaneous mineralization of CO2 and recovery of soluble potassium using earth-abundant potassium feldspar
Simultaneous mineralization of CO2 and recovery of soluble potassium using earth-abundant potassium feldspar
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DOI：
10.1007/s11434-012-5466-7
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发表时间：
2013
影响因子：
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通讯作者：
Heping Xie;Yufei Wang;Yang Ju;Bin Liang;Jiahua Zhu;Ru Zhang;Lingzhi Xie;Tao Liu;Xiangge Zhou
中科院分区：
文献类型：
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作者：
Heping Xie;Yufei Wang;Yang Ju;Bin Liang;Jiahua Zhu;Ru Zhang;Lingzhi Xie;Tao Liu;Xiangge Zhou
二氧化碳捕集与封存（CCS）是应对人为气候变化的重要策略。然而，CCS技术的商业应用目前受到其高能量消耗和成本的阻碍。为了克服这一问题，二氧化碳捕获和利用（CCU）是一种很有前途的二氧化碳处理方法。我们首次开发了一种有前途的方法，利用地球上丰富的钾长石矿化二氧化碳，以有效减少二氧化碳的排放。我们的实验表明，加入六水氯化钙作为添加剂后，钾长石在800℃时可以转化为钙硅酸盐，钙硅酸盐很容易矿化co2形成稳定的碳酸钙并回收可溶性钾。该工艺的转化率达到84.7%。通过进一步研究，采用水热法加入三乙醇胺（TEA）溶液，可将预处理温度降至250℃。转化率最高可达40.1%。同时矿化co2和回收可溶性钾的过程可以很容易地在实践中实现，并可能为应对全球人为气候变化提供经济可行的途径。
CO2capture and storage (CCS) is an important strategy in combatting anthropogenic climate change. However, commercial application of the CCS technique is currently hampered by its high energy expenditure and costs. To overcome this issue, CO2capture and utilization (CCU) is a promising CO2disposal method. We, for the first time, developed a promising method to mineralize CO2using earth-abundant potassium feldspar in order to effectively reduce CO2emissions. Our experiments demonstrate that, after adding calcium chloride hexahydrate as an additive, the K-feldspar can be transformed to Ca-silicates at 800°C, which can easily mineralize CO2to form stable calcium carbonate and recover soluble potassium. The conversion of this process reached 84.7%. With further study, the pretreatment temperature can be reduced to 250°C using hydrothermal method by adding the solution of triethanolamine (TEA). The highest conversion can be reached 40.1%. The process of simultaneous mineralization of CO2and recovery of soluble potassium can be easily implemented in practice and may provide an economically feasible way to tackle global anthropogenic climate change.