四川大学学报：工程科学版2012，Vol.44Issue(4)：1-5,5.
全球二氧化碳减排不应是CCS,应是CCU
CCU：A More Feasible and Economic Strategy than CCS for Reducing CO2 Emissions
摘要
Abstract
A new and promising strategy of C02 capture and utilization （CCU） based on analysis of the costs and potential geological risks of application of CCS technique was presented. It is believed that, in addition to enormous energy expenditure and costs, applica- tion of CCS faces a few geological risks such as leakage of C02, destruction of saline, ground upheaval and triggering earthquake. CCU, meaning that CO2 being captured and used as raw material to produce high-value chemical products （or related by-products）, thereby reducing CO2 emissions with low energy expenditure and costs, is more attractive than CCS as the besl currently available technology. This study, for the first time, shows several promising methods to mineralize CO2 and simultaneously produce valuable products, such as employing MgC12 ~ 6H2 0 to mineralize CO2 and to recover hydrochloric acid and magnesium carbom,te, and using phosphogypsum to mineralize CO2 and produce Sulphur-based compound fertilizer and calcium carbonate as well. It is shown that within the scope of hu- man use （ about 5 km underground）, if 1% of calcium and magnesium ions of the total amount of the earth＇ s crust were used for miner- alization of CO2 with a conversion rate of 50%, it could theoretically sequestrate 2.56 -06 billion tons of CO2. According to a report by the International Energy Agency, global CO2 emission in 2010 was expected to reach 50.06 billion tons. P~tentially, ill theme＇, tile natural sources couhl mineralize as much as 85 thousand years of global CO_, emissions. Besides, if the magnesium ions of approximate 50 million tons of phosphogypsum wastes annually produced in China were used for mineralization, it could theoretically sequestrate 12. 5 million tons of CO2 per year. By producing value-added product compensating the costs of handling CO2, the proposed CCU strategy provides a feasible and economic way to fulfill commercial application of techniques for reducing global CO2 emission.关键词
二氧化碳减排/CCU/CCSKey words
Carbon Dioxide Reduction/CCU/CCS分类
环境科学引用本文复制引用
谢和平,谢凌志,王昱飞,朱家骅,梁斌,鞠杨..全球二氧化碳减排不应是CCS,应是CCU[J].四川大学学报：工程科学版,2012,44(4):1-5,5.基金项目
科技部国际科技合作项目 （）
国家自然科学基金委国际（地区）合作交流项目 （）
教育部CCUS-CO2矿化利用科技攻关项目 （）
