钛吸氕、氘和氚的热力学同位素效应

Research on the Thermodynamics Isotope Effects of Titanium Absorbing Hydrogen, Deuterium and Tritium

在金属氢化物热力学及动力学测试系统上测定了钛吸收氕、氘和氚单质气体的压力-组成等温线(p-c-T曲线),并根据范德荷夫方程得到了钛吸收氕、氘和氚形成不同物相时的热力学参数△H0和△S0。实验证明,钛吸收氕、氘和氚单质气体时有显著的热力学同位素效应,在相同温度、相同原子比下,吸气平衡压力从低到高依次是氕、氘和氚,但其反应焓变和熵变从小到大依次是氚、氘和氕。

The p-c-T curves of titanium absorbing hydrogen,deuterium and tritium are measured on thermodynamics and kinetics measuring system of metal hydride. According to the Van't Hoff E-quation the thermodynamics parameters of the different phases are determined. The experiments indicate that there are obvious thermodynamics isotope effects when titanium absorbing hydrogen, ' deuterium and tritium. The order of equilibrium pressure absorbing gases is 3H>2H>1H. However, the enthalpy and entropy appears to be in verse order, 3H<2H<1H.