| 摘要: |
| 气体水合物是一种新型空调蓄冷介质，但由于诱导期长、过冷度大和生长缓慢的问题限制了其工程应用。本文采用均相成核方法，研究促进剂对水合物增长期内的生长速率的影响。实验研究无促进剂和添加了质量浓度为0.1%的十二烷基硫酸钠（SDS）、十二烷基苯磺酸钠（SDBS）、四丁基溴化铵（TBAB）、四氢呋喃（THF）和全氟烷基醚醇铵盐型阴离子Intechem-01（FC-01）的样品在3 ℃下HCFC-141b水合物增长期内的生长情况。结果表明：在水合物增长期内，热力学促进剂TBAB、THF对水合物生长速率提高作用较小，而动力学促进剂表面活性剂SDS、SDBS和FC-01对生长速率提高明显，其中FC-01效果最佳；分析表面活性剂混合液的液滴尺寸，FC-01对HCFC-141b的分散及稳定性最好，液滴平均尺寸稳定在约350 nm，这也说明对客体材料分散及稳定性优异的动力学促进剂能显著提高水合物增长期内生长速率。 |
| 关键词: 蓄冷 相变 水合物 促进剂 表面活性剂 粒度分布 |
| DOI： |
| Received:January 15, 2018Revised:March 14, 2018 |
| 基金项目:广东省省级科技计划项目（2016A010104022）；广东省教育厅科研项目（2014KTSCX089）；广州市节能专项资金项目（J-2015-16，J-2016-11）；广州市高校协同创新重大项目（1201610004）项目资助。 |
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| Effect of Promoters on Growth Rate during the Growth Period of Clathrate Hydrate |
|
Li Chao1,2, Chen Qiliang1, Gao Gaoyuan1,2, Zhou Xiaoqing1
|
| (1.Academy of Building Energy Efficiency of Guangzhou University;2.School of Civil Engineering, Guangzhou University) |
| Abstract: |
| Gas hydrate is a novel cool-storage medium. However, its engineering application is impeded by its long induction time for crystallization, large super-cooling requirement, and poor growth rate. A homogeneous nucleation method was used to investigate the effect of promoters on the growth rate during the growth period. Samples prepared using 0.1% (w/v) sodium dodecyl sulfate (SDS), sodium dodecylbenzenesulfonate (SDBS), perfluoroalkyl ether alcohol ammonium anion Intechem-01 (FC-01), tetrabutylammonium bromide (TBAB), and tetrahydrofuran (THF) and a blank sample were kept in water bath at 3 ?C to observe the HCFC-141b hydrate growth rate. The experimental results show that thermodynamic promoters TBAB and THF displayed little influence on the growth rate of the hydrate, but the kinetic promoters—surfactants SDS, SDBS, and FC-01—exhibited considerable promotion of the hydrate growth rate, and FC-01 played the best role. By analyzing the droplet size using Malvrern Zetasizer, the results show that the dispersion and stability of the FC-01 sample was the best at an average droplet size of approximately 350 nm, which provided further proof that a kinetic promoter with outstanding dispersion and stability can exponentially enhance the growth rate of hydrates. |
| Key words: cool storage phase change clathrate hydrate promoter surfactants size distribution |
