吴宛青, 宋学明, 魏方, 蔡昊成. 不同表面活性剂对天然气水合物的生成影响实验[J]. 油气储运, 2021, 40(4): 411-416. DOI: 10.6047/j.issn.1000-8241.2021.04.008
引用本文: 吴宛青, 宋学明, 魏方, 蔡昊成. 不同表面活性剂对天然气水合物的生成影响实验[J]. 油气储运, 2021, 40(4): 411-416. DOI: 10.6047/j.issn.1000-8241.2021.04.008
WU Wanqing, SONG Xueming, WEI Fang, CAI Haocheng. Experiment on effect of different surfactants on formation of gas hydrate[J]. Oil & Gas Storage and Transportation, 2021, 40(4): 411-416. DOI: 10.6047/j.issn.1000-8241.2021.04.008
Citation: WU Wanqing, SONG Xueming, WEI Fang, CAI Haocheng. Experiment on effect of different surfactants on formation of gas hydrate[J]. Oil & Gas Storage and Transportation, 2021, 40(4): 411-416. DOI: 10.6047/j.issn.1000-8241.2021.04.008

不同表面活性剂对天然气水合物的生成影响实验

Experiment on effect of different surfactants on formation of gas hydrate

  • 摘要: 表面活性剂对于天然气水合物快速生成的促进作用是一个研究热点,鉴于目前关于表面活性剂浓度对天然气水合物生成效果的影响研究尚无明确结论,在此开展不同表面活性剂对天然气水合物生成的影响实验。在恒容条件下,根据水合物的生成条件,采用SDS、吐温80、鼠李糖脂、曲拉通X-100作为表面活性剂,开展不同表面活性剂及浓度对含大客体分子和甲烷系H型水合物生成过程的影响实验研究,并与不含表面活性剂的生成过程进行对比。结果表明:在相同浓度下,在缩短天然气水合物诱导时间方面,其影响依次为SDS、鼠李糖脂、吐温80、曲拉通X-100;在储气量促进效果方面,其影响依次为SDS、吐温80、鼠李糖脂、曲拉通X-100。表面活性剂促进效果随浓度升高整体呈现先升高、再降低的趋势。SDS、鼠李糖脂对于天然气水合物的生成均有良好的促进作用,尤其是鼠李糖脂这一环境友好型的生物表面活性剂,首次用于天然气水合物的生成实验,既保证了较高的生成速率,又兼顾了环保性的要求;曲拉通X-100则不宜作为H型水合物的表面活性剂。

     

    Abstract: The acceleration of surfactant to the rapid formation of gas hydrate is a hot topic of research. For the effect of the surfactant concentration on formation of gas hydrate is not clear at present, experiments for effect of various surfactants on formation of gas hydrate were conducted. Under the condition of constant volume, the tests were conducted to study the effect of various surfactants including SDS, Tween 80, Rhamnolipid and Triton X-100 and their concentrations on the formation of structure-H methane hydrate with large guest molecules, which was also compared with the formation process of hydrate without surfactant. In terms of the effect of surfactants with same concentration on shortening the induction time of natural gas hydrate, SDS > Rhamnolipid > Tween 80 > Triton X-100, and for the facilitation of gas storage, SDS > Tween 80 > Rhamnolipid > Triton X-100. In addition, with the increase of the concentration of surfactant, the promoting effect increases at first and then decreases. SDS and Rhamnolipid have good effect in facilitating the formation of gas hydrate. In particular, Rhamnolipid, as an environment-friendly biosurfactant, is used in the formation experiment of gas hydrate for the first time. It is capable of ensuring the high formation rate and simultaneously satisfying the requirements of environment protection. However, Triton X-100 is not applicable for the surfactant of structure-H hydrate.

     

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