四丁基溴化铵水合物浆液浓度电导率法在线测定

发布时间：2018-02-15 22:38

本文关键词： 水合物结晶电导率固含量电解质溶液浓度　出处：《化工进展》2017年06期 　论文类型：期刊论文

【摘要】：四丁基溴化铵(TBAB)水合物浆液浓度快速测定对TBAB水合物形成分解动力学研究和水合物浆液生产过程控制具有重要作用。通过在线电导率测定,本文研究了温度、TBAB浓度、TBAB水合物固含量对TBAB水合物浆液电导率的影响,建立了电导率法快速测定TBAB水合物浆液中溶液浓度及TBAB水合物固含量的方法,并提出了一种工业TBAB水合物浆液制备过程中溶液浓度和水合物固含量在线取样定量测量方案。研究结果表明:TBAB溶液电导率随溶液温度升高线性增大,随TBAB水合物固含量的增大而减小;TBAB解离度随浓度增大而减小,低浓度时(摩尔分数0.54%),溶液电导率随浓度增大线性增加,高浓度时,因TBAB解离度显著减小,溶液电导率增长缓慢,出现一个最高值;实验所得的TBAB水合物浆液固含量和TBAB溶液浓度计算经验公式,与实际浓度之间最大相对误差约9.0%,结果较可靠。
[Abstract]:The rapid determination of the concentration of tetra#china_person0# ammonium bromide hydrate slurry plays an important role in the study of the decomposition kinetics of TBAB hydrate formation and the control of the production process of hydrate slurry. In this paper, the effect of TBAB concentration on the conductivity of TBAB hydrate slurry is studied. The method of rapid determination of solution concentration and TBAB hydrate solid content in TBAB hydrate slurry by conductivity method is established. An on-line sampling and quantitative measurement scheme for solution concentration and hydrate solid content in the preparation of industrial TBAB hydrate slurry is proposed. The results show that the conductivity of the solution increases linearly with the increase of solution temperature. With the increase of TBAB hydrate solid content, the dissociation degree of TBAB decreases with the increase of concentration. At low concentration (molar fraction 0.54), the conductivity of solution increases linearly with the increase of concentration. At high concentration, the solution conductivity increases slowly because the degree of dissociation of TBAB decreases significantly. There is a maximum value and the experimental empirical formula of TBAB hydrate slurry solid content and TBAB solution concentration is obtained, the maximum relative error is about 9.0 between the actual concentration and the experimental results, the results are more reliable.
【作者单位】：中国科学院广州能源研究所中国科学院天然气水合物重点实验室中国科学院广州天然气水合物研究中心;中国科学技术大学纳米学院;
【基金】：国家自然科学基金(51576202,51276182) 国家国际科技合作专项(2015DFA61790)项目
【分类号】：O657.11;TQ226.33

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