标题：Possibility for CO2sequestration using sea water
作者：Wang, Wenlong ;Hu, Mingqiang ;Ma, Chunyuan
作者机构：[Wang, Wenlong ;Hu, Mingqiang ;Ma, Chunyuan ] National Engineering Laboratory for Coal Combustion Pollutant Control, School of Energy and Power Engine 更多
会议名称：4th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2010
会议日期：June 18, 2010 - June 20, 2010
来源：2010 4th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2010
摘要：In view of the abundant calcium and magnesium ions in sea water, an approach to CO2capture and sequestration is put forward through enhancing the alkalinity of sea water and increasing the partial pressure of CO2. The purpose of these measures is to increase the concentration of carbonate ion and then accelerate the formation of carbonate precipitation, such as CaCO3and MgCO3. With the increase of pH, some non-target product, e.g. Mg(OH)2, may emerge and precipitate from sea water system, so there is a top limit which is found to be pH=9.25 in order to avoid this problem. Considering that it takes a long time for surface ocean water to absorb atmospheric CO2, the engineered process may accelerate the natural kinetics to industrial rates if sea water is applied to scrub flue gas. Through calculation, it is found that applying alkalinity-enhanced sea water to accelerate the formation of carbonate precipitation is a potential and promising method to capture and sequester CO2. In actual application, condensed sea water from desalination plant or high concentration brine can be introduced to react with waste CO2. Additionally, if these carbonate precipitation could be separated, the natural carbonate resources, such as limestone, would be saved to some degree. © 2010 IEEE.