Demonstration of Kawasaki CO2 Capture (KCC) Moving-bed System with Solid Sorbent at Coal-fired Power Plant

Abstract

Ever since the Paris Agreement, efforts to decarbonize have been underway around the world. Similarly, Japan has declared that it will become carbon neutrality by 2050, and thermal power plants that use fossil fuels are required to reduce their CO₂ emissions using CO₂ capture and storage (CCS). However, the cost of CO₂ capture in CCS is high, and the reduction of this capture cost is required. Kawasaki Heavy Industries, Ltd. has developed a novel CO₂ capture system, named the Kawasaki CO₂ Capture (KCC) system. This system uses an amine solid sorbent comprising a porous solid and a liquid amine. CO₂ is captured by this material and subsequently released by low-temperature steam. Furthermore, the low-temperature steam can be generated from using waste heat in various industries. Therefore, the KCC system can be expected to enable energyefficient capture of CO₂ and reduce the CO₂ capture costs. So far, KHI has developed a fixed-bed and movingbed of the KCC system. In this context, KHI believes that the moving-bed system is suitable for large-scale plants, such as thermal power stations. KHI has been evaluating the feasibility of the KCC moving-bed system by conducting CO₂ capture tests at its in-house bench-scale test facility. In recent years, we have been participating in a national project, and have succeeded in capturing 7.2 t/d CO₂ using the bench-scale test facility. Currently, based on the results of the bench test, after having designed a 40 t/d scale demonstration test facility, we started its construction at a thermal power plant.