主催: 一般社団法人 日本エネルギー学会
後援: （国研）新エネルギー・産業技術総合開発機構
会議名: 第28回日本エネルギー学会大会
開催地: 関西大学 千里山キャンパス
開催日: 2019/08/07 - 2019/08/08
p. 244-245
Phase equilibrium relations (temperature-composition) for semiclathrate hydrates formed from tetra-n-butylphosphonium trifluoroacetate (TBP-TFA), tetra-n-butylphosphonium trifluoropropionate (TBP-TFP), and tetra-n-butylphosphonium trifluorobutyrate (TBP-TFB) + water systems were measured. The highest equilibrium temperatures of TBP-trifluorocarboxylate semiclathrate hydrates were lower than those of the semiclathrate hydrates including the corresponding alkyl carboxylate anions, respectively. The negative charge of fluorine atom influences the crystal structures of semiclathrate hydrates, resulting in low thermodynamic stabilities of semiclathrate hydrates.
In our presentation, we report the additional results, such as latent heat of dissociation, Raman spectra and powder X-ray diffraction patterns and discuss more detail.
