第378回化学システム工学専攻公開セミナー Bioenergy carbon capture and storage (BECCS): Absorption CO2 using aqueous potassium carbonate as absorption solvent
- 日時
- 2022年11月30日（水） 15:00-16:00
- 場所
- 工学部5号館51号講義室
https://u-tokyo-ac-jp.zoom.us/j/85726628397?pwd=QVpheTBKWG9PaEVlYVdlUlhTK05NUT09
Meeting ID: 857 2662 8397
Passcode: 878529
| 講演題目 | Bioenergy carbon capture and storage (BECCS): Absorption CO2 using aqueous potassium carbonate as absorption solvent |
|---|---|
| 講演者 | Dr. Matthäus Bäbler Associate Professor, Dept. Chemical Engineering, KTH Royal Institute of Technology. |
| 概要 | Many European countries set the ambitious goal to become carbon neutral by mid-century. To achieve this goal a multitude of technological and societal advances are needed, including technologies that produce net-negative carbon emissions. The most prominent net-negative carbon emission technology is bio-energy carbon capture and storage (BECCS). BECCS involves the capture and storage of CO2 that is released when converting biomass for heat and power production. Since biomass is a renewable energy source, BECCS leads to negative carbon emission on a ~10-year time-scale (the time it takes for the biomass to grow). In Sweden, conventional power plants use biomass as feedstock which makes them prime candidates for the implementation of BECCS. Along this line, the main power plant operator in the city of Stockholm started a pioneering project to equip one of their heat-and-power plants with a carbon capture unit to collect up to 800 kt CO2/year. The captured CO2 will be liquefied and shipped to Norway for geological storage. The plan is to commission the full-scale capture unit by the end of 2025. Carbon capture from flue gas is preferentially done by absorption using a liquid solvent. Among the different solvents, aqueous potassium carbonate (K2CO3) was chosen for the capture process. K2CO3 has low regeneration energy, shows little degradation and is non-toxics. However, K2CO3 exhibits a slow absorption rate of CO2 which calls for the addition of rate promoters and/or catalysts that enhance the uptake of CO2. In this seminar, I will report on our research on aqueous potassium carbonate as solvent for absorption of biogenic CO2. I will address various technical aspects such as lab scale experiments to evaluate and test different rate promoters; pilot plant tests done in collaboration with an industrial partner to explore real-world performance; and the challenges of monitoring and controlling an absorption plant. |
| 世話人 | 杉山 弘和（内線：27227） |