次世代プロトン伝導性固体酸化物セルを用いたプロピレン製造と二酸化炭素資源化

2023 Fiscal Year Research-status Report

• Project/Area Number: 22KF0309
• Allocation Type: Multi-year Fund
• Research Institution: Kyushu University
• Principal Investigator: 山崎 仁丈 九州大学, エネルギー研究教育機構, 教授 (30292246)
• Co-Investigator(Kenkyū-buntansha): SHI NAI 九州大学, エネルギー研究教育機構, 外国人特別研究員
• Project Period (FY): 2023-03-08 – 2025-03-31
• Keywords: Proton ceramic cells / Membrane reactor / Oefin production / CO2 reduction

Outline of Annual Research Achievements

This project aimed to develop efficient and reliable protonic solid oxide cells (P-SOCs) capable of achieving propane dehydrogenation and CO2 recycling at low temperatures. To date, we have successfully conducted these reactions on P-SOCs operating at temperatures as low as 275°C for 100 hours. By employing an innovative symmetrical cell configuration and applying efficient catalysts, we have demonstrated the efficient conversion of propane to propylene and CO2 to CH4, with a Faradaic efficiency of 94% and a CH4 selectivity of 97%. This study represents the initial endeavor to synthesize valuable chemicals using a ceramic membrane reactor at temperatures below 300 °C.

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

Overall, the research has progressed smoothly. We have established a P-SOC performance evaluation system and obtained efficient catalysts from our collaborators, ensuring the high out-put performance of P-SOC. While we have achieved high electrochemical performance, challenges remain regarding target product selectivity. We intend to focus more efforts on synthesizing valuable chemicals, such as olefins directly from CO2.

Strategy for Future Research Activity

In the future, our focus will be on elucidating cathodic CO2 reduction mechanisms through in-situ FTIR experiments and DFT calculations. We plan to develop nano-sized, face-oriented catalysts to tailor the selectivity of target products. Additionally, we will take time to construct research papers for publication to share our findings and contribute to the advancement of the field.