TBAC水合物粉储存氢气实验研究

采用激光拉曼光谱法对初始压力9 MPa,初始温度273 K,TBAC浓度3%的条件下,四丁基溴化铵(TBAC)水合物粉与氢气生成的TBAC-H2水合物进行了研究,探讨了氢气在TBAC水合物中对笼的占据情况,计算了其储氢密度,并与相同条件下TBAC水溶液的储氢方法做了比较。结果表明:在TBAC水合物中,氢气只填充在水合物的小笼中。在上述条件下,TBAC水合物粉的储氢密度为0.1%,TBAC水溶液的储氢密度为0.021%,采用TBAC水合物粉储存氢气可以提高水合物的储氢密度,这是因为TBAC水合物粉能够增大边界层的接触面积,从而有利于水合物形成过程中的传质,增加水合物的生成量。

Hydrogen Storage in TBAC Hydrates Powder

Laser Raman spectroscopy was used to investigate the TBAC-H2 hydrates which formed in tetrabutyl ammonium chloride （ abbr. TBAC） hydrates powder ＋ hydrogen system under the condition of initial pressure of 9 MPa, initial tem- perature of 273 K and TBAC molarity of 3%. The hydrogen occupancy for TBAC hydrates was studied, and the hydrogen storage capacity was calculated and compared with that of TBAC solution ＋ hydrogen system under the same condition. The results show that hydrogen molecules only occupy the small cages of TBAC hydrates. Moreover, under the above condition, the hydrogen storage capacity is 0.1% in TBAC hydrates powder ＋ hydrogen system and 0.021% in TBAC solution ＋ hy- drogen system, which means that the method of hydrogen stored in TBAC hydrates powder can increase the hydrogen storage capacity. This is mainly because the interface area is increased in TBAC hydrates powder ＋ hydrogen system, and the mass transfer is strengthened which will cause more TBAC-H2 hydrates.