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A unified approach for description of gas hydrate formation kinetics in the presence of kinetic promoters in gas hydrate converters

机译：天然气水合物转化器中存在动力学促进剂时描述天然气水合物形成动力学的统一方法

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摘要

The kinetic promoters have found wide applications in enhancing the rate of energy conversion and storage via gas hydrate formation processes. Effects of different kinetic promoters such as anionic surfactants sodium dodecyl sulfate (SDS), dodecylbenzene sulfonic acid (DBSA), and sodium dodecyl benzene sulfo-nate (SDBS); cationic surfactants, Cetyl trimethyl ammonium bromide (CTAB), dodecyl trimethyl ammonium bromide (DTAB) and non-ionic surfactants, alkylpotyglucoside (APG), dodecyl polysaccharide glycoside (DPG), TritonX-100 (TX100) on methane (CH_4), ethane (C_2H_6) and propane (C_3H_8) gas hydrate formation processes are investigated in this work. A macroscopic kinetic model based on the time variations of reaction chemical potential is also presented for global description of gas hydrate formation processes. Experimental gas hydrate formation data are employed to validate the proposed kinetic model. Effects of promoter's concentrations and agitation intensities on the gas consumption profiles are also investigated. A universal correlation and a unified kinetic map have been proposed for macroscopic description of gas hydrate formation kinetics in the presence or absence of kinetic promoters. According to the presented unified kinetic map, a unique region of gas hydrate formation is identified for the first time. For negligible amounts of kinetic promoters, the presented region disappears and approaches to a unique path at high agitation intensities. The presented unified approach is very useful for global understanding of gas hydrate formations processes in the absence or presence of kinetic promoters.
机译：动力学促进剂已发现在通过气体水合物形成过程提高能量转化和储存速率方面具有广泛的应用。阴离子表面活性剂十二烷基硫酸钠（SDS），十二烷基苯磺酸（DBSA）和十二烷基苯磺酸钠（SDBS）等动力学促进剂的作用；阳离子表面活性剂，十六烷基三甲基溴化铵（CTAB），十二烷基三甲基溴化铵（DTAB）和非离子表面活性剂，烷基马铃薯葡糖苷（APG），十二烷基多糖苷（DPG），在甲烷（CH_4）上的TritonX-100（TX100），乙烷（本文研究了C_2H_6）和丙烷（C_3H_8）气体水合物的形成过程。还提出了基于反应化学势的时间变化的宏观动力学模型，用于整体描述天然气水合物的形成过程。实验气体水合物形成数据被用来验证所提出的动力学模型。还研究了助催化剂浓度和搅拌强度对气体消耗曲线的影响。对于存在或不存在动力学促进剂的天然气水合物形成动力学的宏观描述，已经提出了通用相关性和统一的动力学图。根据给出的统一动力学图谱，首次确定了天然气水合物形成的唯一区域。对于可忽略不计的动力学启动子，呈现的区域消失了，并在高搅拌强度下接近独特的路径。所提出的统一方法对于在不存在或存在动力学促进剂的情况下对天然气水合物形成过程的整体理解非常有用。

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  • 来源
    《Energy Conversion & Management》 |2013年第9期|144-149|共6页
  • 作者

    Bahman ZareNezhad; Farshad Varaminian;

  • 作者单位

    School of Chemical, Petroleum and Gas Engineering, Semnan University, P.O. Box 35195-363, Semnan, Iran,Ministry of Science, Research and Technology, Tehran, Iran;

    School of Chemical, Petroleum and Gas Engineering, Semnan University, P.O. Box 35195-363, Semnan, Iran;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cas hydrate; Formation; Kinetic promoter; Energy conversion; Kinetics;

    机译：水合CAS;编队;动力学促进剂能量转换;动力学;

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