阴离子型表面活性剂/叔胺复配泡沫的性质及CO2/N2响应性能
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1.中石化西北油田分公司工程技术研究院;2.中国石油大学华东

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新型CO2响应型耐温抗盐泡排体系的设计、作用机理和应用研究


Foam Properties and CO2/N2 Response Properties of Anionic Surfactant/ Tertiary Amine Compound Foam
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China University of Petroleum

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    摘要:

    本文通过泡沫实验研究了十二烷基硫酸钠(SLS)、十二烷基磺酸钠(SDS)、十二烷基苯磺酸钠(SDBS)分别与N-十二烷基-N,N-二甲基叔胺(C12A)等摩尔复配的溶液的泡沫性能,以及无机盐和油相对复配体系泡沫性能的影响。此外,针对泡沫性能较好的SLS/C12A复配体系、SDS/C12A复配体系进行CO2响应消泡以及N2加热恢复的重新起泡消泡实验。研究结果表明,SLS/C12A复配体系的泡沫稳定性最好,并且耐盐能力强。SDS/C12A复配体系的抗油效果显著,两种复配体系均表现出较好的CO2响应性和可逆性。通过消泡后溶液变化、表面张力变化推测响应机理为:质子化的C12A与阴离子表面活性剂静电吸引,形成络合物,从溶液中析出,降低了溶液的表面活性,加速了泡沫的破碎。

    Abstract:

    In this paper, the foam performance of sodium dodecyl sulfate (SLS), sodium dodecyl sulfonate (SDS), sodium dodecylbenzene sulfonate (SDBS) and N-dodecyl-N, N-dimethyl tertiary amine (C12A) equimolar compound solution were studied through foam experiments, and the influence of inorganic salt and oil relative to the foam performance of the compound system. In addition, for the SLS/C12A compound system and SDS/C12A compound system with better foam performance, CO2 response defoaming and N2 heating recovery re-foaming and defoaming experiments were carried out. The research results show that the SLS/C12A compound system has the best foam stability and strong salt tolerance. The anti-oil effect of the SDS/C12A compound system is remarkable, and the two compound systems both show good CO2 responsiveness and reversibility. According to the change of the solution and the change of surface tension after defoaming, the response mechanism is inferred that the protonated C12A and anionic surfactants are electrostatically attracted to form a complex, which precipitates out of the solution, which reduces the surface activity of the solution and accelerates the breaking of the foam.

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  • 收稿日期: 2021-07-06
  • 最后修改日期: 2021-11-04
  • 录用日期: 2021-11-12
  • 在线发布日期: 2022-02-11
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