名古屋大学 · 工学
久保田光宏教授の研究室では、高温熱蓄積と温度上昇を実現するための酸化カルシウム／炭酸カルシウム反応や、銅を基体とするスピンエル・デラフォスライト系の赤酸化還元反応を活用した中高温熱化学エネルギー貯蔵材料の開発を進めています。また、アンモニアを安全に貯蔵・供給可能な金属ハロイドと反応する化学的吸着法や、エリトロールと塩化マグネシウムヘキサヒドレートを組み合わせた新規PCMの開発も行っています。これらの研究は、再生可能エネルギーの効率的利用やスマートヒーティングに貢献する革新的なエネルギー貯蔵技術の実現を目的としています。
Figures are computed from collected data and may differ slightly.
In order to develop a high temperature heat storage and temperature upgrading system using the CaO/CaCO3 reaction, decarbonation of CaCO3 has been carried out with thermogravimetry in the ranges of 1073–1193 K and 3–55 kPa.Calcium carbonate virtually did not decompose under the condition where the partial pressure of CO2, P, is higher than half of the equilibrium decomposition pressure of CaCO3, Pe. It implies that the present heat storage system has to be operated in pressure regions lower than
Ammonia has attracted great attention as a hydrogen carrier owing to its high hydrogen content of 17.8 wt%. However, a high pressure of approximately 1 MPa is required to store NH3 in its liquid state at room temperature. The toxicity of ammonia has raised a great deal of concern about leakage from the storage vessel to the ambient atmosphere. To solve this problem, we have focused on absorption and desorption reactions of ammonia with metal chlorides. Some metal chlorides can store NH3 in the f
Cu-based spinel/delafossite couples with Mn and Fe as second cations were synthesized using the Pechini method for medium-high temperature thermochemical energy storage. Physicochemical properties of each sample were investigated. Only CuMn2O4/CuMnO2 exhibited favorable redox behavior in the range of 500–1000 °C. Cu-based delafossite can reoxidize at a lower temperature (∼600 °C), which may be related to the existence of a MO6 octahedra structure. Through the isothermal oxidation method, CuMn2O4
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