Simultaneous mineralization of CO_2 and recovery of soluble potassium using earth-abundant potassium feldspar  

作　　者：XIE HePing WANG YuFei JU Yang LIANG Bin ZHU JiaHua ZHANG Ru XIE LingZhi LIU Tao ZHOU XiangGe ZENG HongMei LI Chun LU HouFang 

机构地区：[1]Center of CCUS and CO_2 Mineralization and Utilization,Sichuan University [2]Key Laboratory of Energy Engineering Safety and Mechanics on Disasters,The Ministry of Education,Sichuan University [3]State Key Laboratory of Coal Resources and Safe Mining,China University of Mining Technology [4]School of Chemical Engineering,Sichuan University [5]School of Chemistry,Sichuan University

出　　处：《Chinese Science Bulletin》2013年第1期128-132,共5页

基　　金：supported by the International Cooperative Research Project of CO2 Storage and Utilization in Saline Aquifer (2012DFA60760)from the Ministry of Science and Technology;Basic Research for Chinese Energy Storage in Caverns Built in Highly Impure Rock Salt(51120145001) from the Natural Science Foundation of China;the National Natural Science Funds for Distinguished Young Scholars (51125017);the National Basic Research Projects of China (2011CB201201,2010CB226804)from the Ministry of Science and Technology;Key Research Program from the Ministry of Education of China

摘　　要：CO2 capture 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,CO2 capture and utilization(CCU) is a promising CO2 disposal method.We,for the first time,developed a promising method to mineralize CO2 using earth-abundant potassium feldspar in order to effectively reduce CO2 emissions.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 CO2 to 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 CO2 and recovery of soluble potassium can be easily implemented in practice and may provide an economically feasible way to tackle global anthropogenic climate change.CO2 capture 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, CO2 capture and utilization （CCU） is a promising CO2 disposal method. We, for the first time, developed a promising method to mineralize CO2 using earth-abundant potassium feldspar in order to effectively reduce CO2 emissions. Our experiments demonstrate that, after adding calcium chloride hexahydrate as an additive, the K-feldspar can be transformed to Ca-silicates at 800℃, which can easily mineralize CO2 to 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℃ using hydrothermal method by adding the solution of triethanolamine （TEA）. The highest conversion can be reached 40.1%. The process of simultaneous mineralization of CO2 and recovery of soluble potassium can be easily implemented in practice and may provide an economically feasible way to tackle global anthropogenic climate change.

关 键 词：水溶性钾 CO2 钾长石 矿化 恢复使用 地球 二氧化碳 气候变化 

分 类 号：TQ113.247[化学工程—无机化工] O613.71[理学—无机化学]