Seawater desalination using PVDF-HFP membrane in DCMD process: assessment of operating condition by response surface method

“…Note that in this modelling methodology the nonlinearity is given by the quadratic terms. Some examples of RSM models in MD technology can be found in [33,[93][94][95][96][97][98][99].…”

Section: Response Surface Methodology Techniquementioning

confidence: 99%

Hierarchical Control and Optimization Strategies Applied to Solar Membrane Distillation Facilities

Gil

2023

Springer Theses

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I am going to start by thanking my supervisors Manuel Berenguel and Lidia Roca for their guidance and support. Manuel Berenguel was my professor in the Bachelor's Degree in Industrial Electronics Engineering. I still remember the first email I exchanged with him and the first time I went to his office, all this ended with me heading to Brescia (Italy) for six months (where I lived a rewarding experience indeed, Antonio thank you for your welcome, hospitality and help). From that first moment on, you have known how to transmit to me the curiosity and enthusiasm for research in general, and the passion for automatic control in particular, encouraging me to get involved in a new world that I had never imagined. Lidia, I also remember the first time I met you at the Plataforma Solar de Almería when I started my final degree work. From the beginning, and long before starting the Ph.D. thesis, you have played a fundamental role in my progress. I would not know how to express in words all the support you have given me, thanks for always listening to my ideas and for being willing to help me in everything I have needed. Manolo and Lidia, thank you very much for your patience, for understanding and trusting me, and for all the knowledge and experiences that you have transmitted to me; everything together has helped me grow both academically and personally. Both of you have my admiration, appreciation and respect.

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“…PVDF‐HFP polymeric membranes are widely used in DCMD applications 27–33 due to their hydrophobicity, excellent thermal stability, suitable mechanical properties, and low cost 29 . Three different concentrations of PVDF‐HFP (14, 16, and 18%) were prepared by adding PVDF‐HFP pellets to a 1:1 mixture of DMF‐Acetone (vol/vol).…”

Section: Methodsmentioning

confidence: 99%

Unsupported electrospun membrane for water desalination using direct contact membrane distillation

Jalloul

Hashem

Tehrani‐Bagha

et al. 2020

J of Applied Polymer Sci

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In this project, an unsupported electrospun poly(vinylidene fluoride)‐co‐hexafluoropropylene (PVDF‐HFP) membrane was used for water desalination using direct contact membrane distillation (DCMD). The membrane was electrospun using a laboratory‐scale machine with multiple nozzles that was developed in‐house. Critical process parameters, including the applied voltage and polymer concentration, were optimized to obtain bead‐free electrospun membranes with fiber diameters less than 300 nm. To improve the membrane thermal stability and performance, the selected electrospun membrane was heat‐pressed at 160°C. The untreated and heat‐pressed membranes were tested in a DCMD setup at different feed temperatures (60, 70, and 80°C) and feed flow rates (0.4, 0.6, and 0.8 L/min), while maintaining the permeate temperature and flow rate at 20°C and 0.2 L/min, respectively. The modified electrospun membrane exhibited a very high permeate flux (>37.5 kg/m2/h) and a salt rejection rate of 99.99% at a feed temperature of 70°C. The performance of the heat‐pressed unsupported PVDF‐HFP electrospun membrane was nearly identical to a commercially available polytetrafluoroethylene (PTFE) supported membrane. These promising results demonstrate that relatively low‐cost electrospun membranes can be easily produced and successfully used in DCMD to minimize the capital cost and increase the energy efficiency of the process.

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Seawater desalination using PVDF-HFP membrane in DCMD process: assessment of operating condition by response surface method

Cited by 25 publications

References 22 publications

A new innovative breakthrough in the production of salt from bittern using a spray dryer

A new innovative breakthrough in the production of salt from bittern using a spray dryer

Hierarchical Control and Optimization Strategies Applied to Solar Membrane Distillation Facilities

Unsupported electrospun membrane for water desalination using direct contact membrane distillation

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