CFD modelling and experimental analysis of aromatic amine extraction in a flat sheet supported liquid membrane contactor

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2024-11-30 DOI:10.1016/j.jwpe.2024.106681

Gilles Van Eygen , Emma Lodewijckx , Sean Van Gestel , Nilay Baylan , Anita Buekenhoudt , João A.P. Coutinho , Bart Van der Bruggen , Patricia Luis

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Abstract

Supported liquid membranes (SLMs) using ionic liquids are effective for the extraction of aromatic amines. This experimental study employed a flat sheet SLM contactor with the ionic liquid trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)imide ([P_6,6,6,14][N(Tf)₂]) as the solvent to investigate the separation of

α

-methylbenzylamine (MBA) and 1-methyl-3-phenylpropylamine (MPPA) from isopropyl amine (IPA). A detailed process study was conducted to examine the effects of flow rate (5–10 L/h), feed concentration (0.5–2.5 g/L), and feed pH (9–11) on extraction performance. Under standard experimental conditions (10 L/h, 1.0 g/L, pH 10), MBA and MPPA demonstrated high solute fluxes of 2.39 and 5.47 g/(m²h), respectively, compared with IPA, which had a solute flux of 0.84 g/(m²h). However, after 24 h, the recoveries were relatively low, at 17.9 % for MBA, 32.6 % for MPPA, and 5.2 % for IPA. No significant velocity dependency was observed, with slight variations attributed to minor pH changes, while a linear flux increase was noted for higher feed concentrations. The feed pH had a significant impact on the extraction performance, with higher pH levels resulting in increased solute fluxes and recoveries. To complement the experimental results, computational fluid dynamics (CFD) simulations were employed using COMSOL Multiphysics 5.1. The model demonstrated satisfactory agreement across various conditions, but underestimated fluxes and recoveries at higher pH values. Consequently, a new mass transfer mechanism was proposed to explain the variations observed in the experimental results.

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平板支撑液膜接触器萃取芳香胺的CFD建模与实验分析

离子液体支撑液膜萃取芳香族胺是一种有效的萃取方法。本实验采用平板SLM接触器，以离子液体三己基十四烷基磷二（三氟甲基磺酰基）亚胺（[p6,6,6,14][N(Tf)2]）为溶剂，研究了α-甲基苄胺（MBA）和1-甲基-3-苯基丙胺（MPPA）与异丙胺（IPA）的分离。研究了流速（5 ~ 10 L/h）、饲料浓度（0.5 ~ 2.5 g/L）和饲料pH（9 ~ 11）对提取性能的影响。在标准实验条件下（10 L/h, 1.0 g/L, pH 10）， MBA和MPPA的溶质通量分别为2.39和5.47 g/(m2h)，而IPA的溶质通量为0.84 g/(m2h)。然而，24小时后，回收率相对较低，MBA为17.9%，MPPA为32.6%，IPA为5.2%。没有观察到明显的速度依赖性，轻微的pH变化导致了轻微的变化，而饲料浓度越高，通量呈线性增加。进料pH值对萃取性能有显著影响，pH值越高，溶质通量和回收率越高。为了补充实验结果，使用COMSOL Multiphysics 5.1软件进行了计算流体动力学（CFD）模拟。该模型在各种条件下显示出令人满意的一致性，但低估了较高pH值下的通量和回收率。因此，提出了一种新的传质机制来解释实验结果的变化。

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies