操作参数对PVDF平板膜总跨膜通量的影响

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-07-20 DOI:10.3311/ppch.21815

Hafsa Bekraoui, D. Nehari, T. Baki, Mouad Bousmaha

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引用次数: 0

摘要

膜蒸馏(MD)是一种新兴的热膜技术，涉及由疏水膜上的蒸汽压力梯度驱动的水蒸气。MD面临着几个挑战，其中之一是水蒸气的通量。采用共流PVDF平板直接接触，研究了膜蒸馏过程中总跨膜通量。膜蒸馏应用。本研究的目的是提高总跨膜通量。研究了进料口温度(333.15 ~ 358.15 K)、进料流量(1 ~ 2.5 kg/s)、渗透口温度(288.15 ~ 313.15 K)、进料口NaCl浓度(0.035 ~ 0.485 kg/kg)等操作参数的影响。为了获得一个好的总跨膜通量值，本文研究了它们与总跨膜通量的相互作用。所得结果在matlab - simulation中采用试错法计算。最后输入各种参数值，从而绘制所需曲线进行讨论和分析。结果表明:进料温度越高，PVDF平板膜的总跨膜通量越高，进料温度为358.15 K，渗透温度为293.15 K，流速为2.5 kg/s，进料NaCl浓度为0.035 kg/kg时，总跨膜通量为73.2075 kg/(m2 h)。进料温度对通过膜的总通量有显著影响;流速、渗透入口温度和进料入口NaCl浓度对其影响不显著。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The Effect of Operating Parameters on Total Cross-membrane Flux in a PVDF Flat Sheet Membrane

Membrane distillation (MD) is an emerging thermal membrane technology that involves water vapor driven by a vapor pressure gradient over a hydrophobic membrane. MD faces several challenges, one of which is the flux of water vapor. The total cross-membrane flux in membrane distillation was investigated in this paper using the co-current PVDF flat sheet for direct contact. membrane distillation applications. The goal of this research is to improve total cross-membrane flux. The effect of various operational parameters is studied, including feed inlet temperature (333.15–358.15 K), feed flow rate (1–2.5 kg/s), permeate inlet temperature (288.15–313.15 K), and feed inlet NaCl concentration (0.035 to 0.485 kg/kg). To acquire a good value of total cross-membrane flux, their interactions with the total cross-membrane flux are studied in this work. The obtained results were computed during MATLAB-Simulations under several scenarios adopting the Trial-&-Error approach. This last inputs various parameters' values and thus draws the required curves to be discussed and analyzed. The results indicated that the PVDF flat sheet membranes provide a significantly higher total cross-membrane flux at higher feed input temperatures, producing a 73.2075 kg/(m2 h) at a feed inlet temperature of 358.15 K, a permeate inlet temperature of 293.15 K, and a flow rate of 2.5 kg/s, with a feed inlet NaCl concentration of 0.035 kg/kg. Feed inlet temperature significantly affected the total flux through the membrane; however, flow rate, permeate inlet temperature, and feed inlet NaCl concentration had a less significant effect.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.