Temperature dependent behavior of hydrogen molecules on carbon nanostructures

2019-08-02 02:14:21

hydrogen adsorption molecules dependent MWCNTs

责任者: Zheng, Qingrong;Gu, Anzhong;Lu, Xuesheng;Lin, Wensheng 单位: Inst. of Refrigeration, Sch. of Mech. and Power Eng., Shanghai Jiaotong Univ., Shanghai 200030, China 来源出处: Huagong Xuebao/Journal of Chemical Industry and Engineering (China),2004,55(SUPPL):143-148 摘要: For studying the temperature dependent behavior of hydrogen molecules adsorbed on carbon nanostructures, hydrogen adsorption data on multi-walled carbon nanotubes (MWCNTs) were analyzed with an approximate adsorption model developed from lattice theory. The maximum surface concentration of hydrogen molecules upon the MWCNTs was determined by the linear regression on the experimental data. The interaction potential of hydrogen -MWCNTs and the isosteric heat of hydrogen adsorption in low limit surface concentration were calculated by using gas-surface virial coefficients and Henry law. We conclude that hydrogen molecules physically accumulate mostly in a place where the potential was at a minimum within the central tubular pore of the MWCNTs and are likely in a state of the compressed gas; significant adsorption of hydrogen molecules does not occur on the MWCNTs, neither does the temperature dependent hydrogen-hydrogen interaction energy show an optimum temperature region for hydrogen storage by adsorption on the MWCNTs. 关键词: Gas fuel storage;Hydrogen;Temperature;Nanostructured materials;Gas adsorption;Carbon nanotubes;Molecular interaction energy;Carbon nanostructures;Temperature dependent behavior;Hydrogen molecules;Hydrogen adsorption