Effect of sulfation on carbon capture using natural CO_2 carrier CaO looping cycle at high temperature
Abstract：The effects of sulfation of CaO on average carbonation conversion,CO2 capture efficiency and energy requirement in a calcinier for the regeneration of CaO at existence of SO2 in flue gas which entered a carbonator were investigated.The results show that the sulfation of CaO induces a decrease in average carbonation conversion and CO2 capture efficiency at the same natural CO2 carrier flow ratios.The energy requirement in the calciner with the sulfation of CaO is higher than that without the sulfation of CaO at the same carrier flow ratios.Also,increasing the carrier supplement flow ratio minimizes the effect of the sulfation of CaO on energy requirement in the calciner,while improving the carrier recycled flow ratio aggravates the effect.The energy requirement in the calciner with sulfation of CaO is greater than that without sulfation at the same CO2 capture efficiency.When the volume ratio of SO2 to CO2 is 1% and CO2 capture efficiency is 90%,the energy requirement in the calciner with the sulfation of CaO is 290 kJ/mol CO2,which shows a 14% rise compared with that without the sulfation.
Keywords：sulfationnatural CO2 carrierCaOcarbon capture
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)