抄録
As a countermeasure against global warming, CO2 capture and storage (CCS) technology represents the core technology, and its early realization is expected. CSS technology consists of CO2 capture technology, transport technology, and compression and storage technology. One of the major issues of CCS technologies is the large amount of energy required for CO2 capture. If part or all energy could be supplied from waste heat, significant energy savings would be achieved. With our proposed CO2 capture system (KCC System: Kawasaki CO2 Capture system), an energy-saving system for easily utilizing the waste heat was constructed to capture CO2 using low-temperature steam. In this study, we have performed bench tests on a moving-bed system suitable for large-scale plants and verified the performance of an adsorbent. The system successfully captured 3.1 t/day of CO2 from the exhaust gas and confirmed the viability of an energy-saving moving-bed system. We also performed a feasibility study of a system for capturing CO2 from the exhaust gas of a gas engine and found that the energy required for the KCC system utilizing waste heat from the gas engine was 1.3 GJ/t-CO2. This shows that the moving-bed system using an adsorbent is an effective means for CO2 capture.
