Demonstration Test of High-Speed Fly Ash Carbonation Treatment Technology in Municipal Waste Incinerator

Abstract

To achieve carbon neutrality in 2050, CO₂ reduction technology by fixing (CCS) and using (CCU) CO₂ is drawing attention. At our company, we focused on the property that heavy metals are fixed to fly ash, adsorbed and insolubilized by the carbonization reaction in which fly ash absorbs / immobilizes CO₂. A demonstration test of carbonation technology was conducted on an actual scale plant to investigate absorption / immobilization CO₂ generated at the plant. In the demonstration test, (1) promotion of effective use of CO₂ by carbonation and (2) reduction effect of heavy metals treatment chemical usage were verified. Lab-scale carbonation tests were also conducted at multiple facilities to clarify the effects of furnace type and ash composition on carbonation.We report the test results on these different scales.