四丁基溴化铵水合物储存氢气的研究

Hydrogen Storage with tetra-Butyl Ammonium Bromide Hydrate

利用高压搅拌式水合物实验装置,进行了四丁基溴化铵(TBAB)水合物储氢的研究。在恒容条件下,考察了水浴温度、初始压力对水合物储氢特性的影响,并比较了TBAB水合物和四氢呋喃(THF)水合物的储氢性能。实验结果表明,在初始压力7.2 MPa、x(TBAB)=0.6%的条件下,水浴温度越低,生成水合物的诱导时间越短,储氢密度越大,水浴温度为0.5℃时储氢密度最大(为0.095%);在水浴温度0.5℃、x(TBAB)=0.6%的条件下,初始压力越大,生成水合物的诱导时间越短,储氢密度越大,在初始压力为8.4 MPa时储氢密度最大(为0.109%);在水浴温度为0.5℃、初始压力7.2 MPa的条件下,THF水合物的储氢密度仅为0.014%,远低于TBAB水合物的储氢密度(0.095%),TBAB水合物的储氢性能更好。

The characteristic of tetra-butyl ammonium bromide（TBAB） hydrates for hydrogen storage was studied using experimental apparatus with high pressure stirring. The effects of water bath temperature and initial pressure on the hydrogen storage under the condition of constant volume were discussed. The characteristic of TBAB hydrates was compared with that of tetrahydrofuran （THF） hydrates. The results showed that under the initial pressure of 7.2 MPa and the TBAB solution mole fraction of 0.6%, low temperature could lead to short hydrate formation time and large hydrogen storage capacity, the largest hydrogen storage capacity was 0.095% at the water bath temperature 0.5℃. Under the water bath temperature of 0.5 ℃and the TBAB solution mole fraction of 0.6%, high initial pressure could lead to short hydrate formation time and large hydrogen storage capacity, the largest hydrogen storage capacity was 0.109% at the initial pressure 8.4 MPa. Under the water bath temperature of 0.5 ℃ and the initial pressure of 7.2 MPa, the hydrogen storage capacity of THF hydrates was 0.014%, smaller than that of TBAB hydrates（0.095%）.