High strength hollow glass microspheres with diameter no more than 1 mm are attractive for hydrogen storage and transport.Microspheres were made by drop tower techniques with 150—250 μm diameter and 0.9—4.0 μm membrane thickness.By immersion in high pressure hydrogen for a period of time at an elevated temperature the microspheres could be filled with hydrogen.The hydrogen pressure was equal to that of gas-filled chamber at 350℃ for 6—10 h.With the help of Fick〖DK〗’s first law and the ideal gas law the pressure in the microsphere could be calculated.Based on the Arrhenius expression

permeability coefficient decreased as temperature dropped.The half-life time for hydrogen retention in hollow glass microspheres was about 40—50 d at room temperature.The maximum hydrogen pressure could reach 20—25 MPa in the hollow glass microspheres with 200 μm