Equilibrium Conditions for Semiclathrate Hydrates Formed in the CH4 + N2 + O2 + Tetra-n-butyl Ammonium Bromide Systems
Equilibrium Conditions for Semiclathrate Hydrates Formed in the CH4 + N2 + O2 + Tetra-n-butyl Ammonium Bromide Systems
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DOI：
10.1021/je200088f
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发表时间：
2011-05
影响因子：
--
通讯作者：
D. Zhong;Y. Ye;Chen Yang
中科院分区：
文献类型：
--
作者：
D. Zhong;Y. Ye;Chen Yang
本文测定了四正丁基溴化铵(TBAB)与混合气体(摩尔分数为29.95%CH4+60.0%N_2+10.05%O_2)形成水合物的相平衡条件。实验温度为282~290 K，压力为0.99~6.56 Mpa，质量分数为0.05~0.20。对于本文所用的混合气体，实验结果表明，在给定的温度下，形成TBAB半泡沫酸盐水合物所需的压力明显低于从相同的混合气体中形成气体水合物所需的压力。在一定温度下，随着溶液中TBAB浓度的增加，与气体混合物形成的TBAB半胶体的形成压力降低。
In the present work, phase equilibrium conditions for tetra-n-butyl ammonium bromide (TBAB) semiclathrate hydrates formed with the gas mixture (29.95 % CH4 + 60.0 % N2 + 10.05 % O2 in mole fraction) were measured. The experimental temperature, pressure, and mass fraction of TBAB ranged from (282 to 290) K, from (0.99 to 6.56) MPa, and from (0.05 to 0.20), respectively. For the gas mixture used in this work, the experimental results showed that at a given temperature, the pressure required to form TBAB semiclathrate hydrates is significantly lower than that required for forming gas hydrates from the same gas mixture. The formation pressure of TBAB semiclathrates formed with the gas mixture is reduced as TBAB concentration is increased in the solution at a given temperature.