基于Langmuir吸附模型分析了物理吸附储氢的最佳条件,讨论了压强、温度及吸附热对储存量的影响.由于平衡常数随温度和吸附热按指数规律变化,存储量对温度和吸附热的依赖十分敏感.在300K时,压强从50~100bar降到1.5bar的最大存储/释放量对应的吸附热约为-33.5kJ·mol-1.
In this paper,the optimum storage conditions are discussed based on the Langmuir isotherm model.We analyze the adsorption equilibrium constant and elucidate the quantities involved.The effect of pressure,temperature and the heat of adsorption on the uptake-release are discussed.As the equilibrium constant changes with temperature and the heat of adsorption exponentially,the uptake-release capacity depends sensitively on them.For maximum delivery pressure between 50 to 100bar and P1=1.5bar at ambient temperature,an adsorption enthalpy change about-33.5kJ·mol-1 is desired.