Hydrogel-Coated Structured Packing for Water Separation from Oily Liquid Streams

Perez, Isadora Dias; Santos, Fernanda Brito dos; Soares, João; Vieira, Melissa Gurgel Adeodato; Fregolente, Leonardo Vasconcelos

doi:10.2139/ssrn.4435494

Cited by 1 publication

(1 citation statement)

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“…Bayat and Nasri modified the surface of cellulose nanocrystals (CNCs) by hydrogel synthesis through the photoinduced electron transfer polymerization (PET-ATRP) mechanism . Despite the wide range of applications in many scientific fields, the literature reports only a few research studies that use hydrogels as potential materials to remove water from liquid fuels, yet these studies reported promising results. − Previously, work was performed on optimizing polymeric hydrogels for water removal from a variety of liquid fuel sources, including diesel and biodiesel, showing that such systems can be further optimized, and potentially integrated with hydrophilic biobased materials. − Based on these promising results, nanocomposite hydrogels based on poly(MMA- co -MAA) and CNFs were synthesized by free radical polymerization to remove water from diesel. The biomaterial was also characterized through physicochemical analysis, including SEM (scanning electron microscopy), DSC (differential scanning calorimetry), TGA (thermogravimetric analysis), FTIR (Fourier transform infrared spectroscopy), and XRD (X-ray diffraction).…”

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confidence: 99%

Synthesis of a Novel Cellulose Nanofiber-Based Composite Hydrogel with Poly(methyl methacrylate-co-methacrylic Acid) for Effective Water Removal from Liquid Fuels

Brito dos Santos,

Perez,

McMichael

et al. 2024

Ind. Eng. Chem. Res.

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Water is present in liquid fuels in three different forms: dissolved, free, or emulsified, and its presence can considerably impair fuel quality by encouraging microorganism growth. This growth contributes to the generation of sludge, an increase in turbidity, and the corrosion of tanks and mechanical components of motor vehicles. In this context, this research work proposes the synthesis of a nanocomposite hydrogel made of poly(methyl methacrylate-comethacrylic acid) and cellulose nanofibers (CNFs) by free radical polymerization for removal of water from diesel. An extensive physicochemical characterization of the hydrogels was performed, and a full experimental design (2 2 with 3 central points) evaluated the influence of the different CNF percentages and temperatures on the maximum swelling degree of the hydrogel nanocomposites. According to this experimental design, the only statistically significant independent variable was the CNF percentage. Finally, batch tests were performed to build the kinetic curves based on five adsorbents: CNF, poly(MMA-co-MAA), and poly[(MMA-co-MAA) with CNF at 1, 2.5, and 5%]. All samples were highly effective at removing water from commercial diesel in a short time. In this analysis, CNF reached equilibrium in 3 h, while all other samples required 8 h. All composite hydrogels exceeded 80% water removal at the equilibrium time. The high efficiency of the nanocomposites was demonstrated, suggesting the potential for application on an industrial scale, over a wide range of water concentrations.

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