DETERMINATION OF INTRINSIC RATE CONSTANTFOR HYDRATE FORMATION IN THE METHANE-TBAB-WATER SYSTEM
DETERMINATION OF INTRINSIC RATE CONSTANTFOR HYDRATE FORMATION IN THE METHANE-TBAB-WATER SYSTEM
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发表时间：
2011-07
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通讯作者：
Jebraeel Gholinezhad;A. Chapoy;Hooman Haghighi;B. Tohidi
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作者：
Jebraeel Gholinezhad;A. Chapoy;Hooman Haghighi;B. Tohidi
半笼形化合物，特别是四正丁基溴化铵（TBAB）在气体储存、气体分离、空调等方面的潜在应用引起了重大的科学兴趣。在本工作中，我们从动力学的角度研究了TBAB溶液和甲烷气体形成的半笼形物。气体的吸收率和水合物形成的速率从实验数据中确定的压力高达10.3 MPa和浓度高达3.7摩尔%。计算时考虑了水合物形成的初始阶段，其中可以假定生长是均匀的。结果表明，水合物生成速率随进料压力和TBAB浓度的增加而增加。此外，当水合物形成的初始速率较高时，掺入半笼形物中的甲烷气体的量较低。换句话说，当水合物形成缓慢时，进入水合物相的气体的最大摩尔数较高。
The potential applications of semi-clathrates, particularly those of tetra-n-butyl ammonium bromide (TBAB) in gas storage, gas separation, air-conditioning, etc. have initiated significant scientific interest. In the present work, we have studied the semi-clathrates formed from TBAB solution and methane gas from a kinetic point of view. The rate of gas uptake and the rate of hydrate formation were determined from experimental data at pressures up to 10.3 MPa and concentrations up to 3.7 mol%. The initial stage of hydrate formation where the growth can be assumed homogeneous was considered for calculations. The results showed that the rate of hydrate formation increases with increasing the feed pressure and TBAB concentration. Additionally, when the initial rate of hydrate formation is higher, the amount of methane gas incorporated into the semi-clathrates is lower. In other words, the maximum number of moles of gas which goes into hydrate phase is higher when the hydrates form slowly.