物理吸附储氢的最佳条件分析  

Optimum conditions for physisorption storage of hydrogen

作　　者：陈宏善[1] 刘鑫[1] 

机构地区：[1]甘肃省原子分子物理与功能材料重点实验室、西北师范大学物理与电子工程学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2015年第2期32-36,41,共6页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(11164024)

摘　　要：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.

关 键 词：储氢 物理吸附 LANGMUIR模型 最优条件 

分 类 号：O642[理学—物理化学] O647[理学—化学]