2013 Fiscal Year Final Research Report

Study of Thermodynamic State Change of Hydrogen Fluid Mixtures with Decompression in the Supercritical Region

Research Project

Project/Area Number	24760168
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Thermal engineering
Research Institution	Kyushu University
Principal Investigator	SAKODA Naoya 九州大学, 工学(系)研究科(研究院), 助教 (30532337)
Project Period (FY)	2012-04-01 – 2014-03-31
Keywords	水素 / 混合物 / 超臨界流体
Research Abstract	Thermodynamic behavior of binary fluid systems including hydrogen is complicated, and the systems with hydrocarbons and carbon dioxide have the critical curve diverging to a high pressure region, which are classified into Type III. In this study, Peng-Robinson equation of state (PR EOS) is adopted for the hydrogen binary systems with methane, ethane, propane, and carbon dioxide, and the mixing parameter was determined by fitting only the critical point data based on the corresponding states principle. Nitrogen + carbon dioxide system is also estimated to be classified into Type III, and behavior of the system in the supercritical region was experimentally observed in various temperatures and pressures.