Review of bench and pilot-scale testing for calcium looping capture of carbon dioxide
CO2 generated by coal-fired power plants could exacerbate the greenhouse effect,so achieving greenhouse gas emission reduc-tion goals is crucial.Carbon capture technology has been identified as a key measure to reduce carbon emissions in the power sector.When mature technologies such as amine scrubbing and oxygen combustion technology are integrated into power plants,efficiency penal-ty could result in high efficiency penalty(8.0％-12.5％).For this reason,to minimize efficiency penalties and related increased power costs,new carbon dioxide capture technologies have been developed.The calcium looping process is a promising technology that could reduce efficiency penalty to 7％.Due to the high cost of capital,cost-effective technologies with commercial scale have not yet been developed.Before designing and constructing commercial scale devices,it is necessary to have a deep understanding of the system behavior under various operating conditions to optimize process parameters and evaluate feasibility.An overview of the available bench-scale and pilot-scale testing facilities worldwide.Characteristics and operating conditions of the testing equipment were summarized,key experimental results were also extracted,indicating that the feasibility of the CaL process has been widely studied in bench-scale and pi-lot-scale facilities ranging from 1 kWth-1.9 MWth.In these CaL systems,the operating temperature range of the carbonator is 600-700 ℃,and the operating temperature of the calciner is 800-1 000 ℃.The CO2 entering the carbonator comes from the power plant and can achieve CO2 capture efficiency of over 90％.In addition,adjusting operational design parameters such as CO2 inlet concentration,carbonation or calcination temperature,etc.will affect CO2 capture efficiency.In summary,these results provide valuable operational data for the development of future large-scale platforms,which will also be the key to expanding and deploying this technology in future development.
coal fired power plantcarbon capturecalcium loopingbenchpilot plant
NETL
NSTL
万方数据
