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首页> 外文期刊>Journal of water reuse and desalination >Feasibility assessment of pervaporation for desalinating high-salinity brines
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Feasibility assessment of pervaporation for desalinating high-salinity brines

机译：用于脱盐高盐度盐水的可行性评估

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摘要

Pervaporation, which is a non-pressure driven membrane process, was evaluated to determine its viability for desalinating high-salinity source waters like those originating from oil and natural gas development (produced water). Two types of membrane material chemistries were studied in order to identify the optimal properties for maximizing the permeate flux under a given set of operating conditions. Permeate flux was determined to be a significant function of membrane thickness and the diffusion coefficient of water through the membrane. The diffusion coefficient is in turn a function of the membrane's affinity for water (hydrophilicity) and its fractional free volume space. A cellulose triacetate membrane (Membrane B) achieved fluxes of 0.06 m~3 m~(_2) day~(-1) when treating solutions having salt concentrations of 100 g L~(-1), comparable to fluxes achieved by other types of non-pressure driven membrane processes. The flux increased in a linear fashion with decreasing ionic strength and improved through increases in the vapor pressure gradient and/or inclusion of a feed channel spacer into the test cell. Salt rejection efficiencies by all membranes were >99%; however, co-ions were able to penetrate into the membrane material matrix over time.
机译：评价是非压力驱动膜过程的渗透蒸发，以确定其用于脱落高盐度源水的可行性，如源自石油和天然气发育（产生的水）。研究了两种类型的膜材料化学，以确定在给定的一组操作条件下最大化渗透通量的最佳性能。确定渗透剂助焊剂是膜厚度的显着函数和通过膜的水的扩散系数。扩散系数反过来函数膜对水（亲水性）的亲和力及其分数自由体积空间。当处理含有盐浓度为100g L〜（-1）的溶液时，纤维素三乙酸膜（膜B）达到0.06m〜3 m〜（_2）天〜（-1）的助熔剂，与其他类型的其他类型所实现的助熔剂相当非压力驱动膜过程。通量以线性方式增加，具有降低离子强度并通过蒸汽压力梯度的增加和/或将进料通道间隔物的增加而改善进入测试电池。所有膜的盐排斥效率> 99％;然而，共同离子随时间渗透到膜材料基质中。

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  • 作者

    Emily Huth; Satish Muthu; Luke Ruff; Jonathan A. Brant;

  • 作者单位

    Department of Civil and Architectural Engineering University of Wyoming 1000 E. University Avenue Laramie WY 82071 USA;

    Department of Civil and Architectural Engineering University of Wyoming 1000 E. University Avenue Laramie WY 82071 USA;

    Department of Civil and Architectural Engineering University of Wyoming 1000 E. University Avenue Laramie WY 82071 USA;

    Department of Civil and Architectural Engineering University of Wyoming 1000 E. University Avenue Laramie WY 82071 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境科学、安全科学;
  • 关键词

    desalination; pervaporation; produced water;

    机译：海水淡化;概念;生产的水;

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