Lignin biorefinery: Separation of vanillin, vanillic acid and acetovanillone by adsorption

Gomes, E.D.; Rodrigues, Alírio E.

doi:10.1016/j.seppur.2019.01.071

Cited by 41 publications

(20 citation statements)

References 69 publications

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“…Due to its rich chemical structure, lignin has found a number of applications. It can be used as a source of highly functional chemicals, adsorbents, flocculants and scale inhibitors [3]. There are also numerous literature reports regarding the use of lignin as a filler for polymers [4,5,6] or a component of abrasive tools [7,8].…”

Section: Introductionmentioning

confidence: 99%

Lignin-Based Hybrid Admixtures and their Role in Cement Composite Fabrication

et al. 2019

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In this study, a technology for obtaining functional inorganic-organic hybrid materials was designed using waste polymers of natural origin, i.e., kraft lignin and magnesium lignosulfonate, and alumina as an inorganic component. Al2O3-lignin and Al2O3-lignosulfonate systems were prepared by a mechanical method using a mortar grinder and a planetary ball mill, which made it possible to obtain products of adequate homogeneity in an efficient manner. This was confirmed by the use of Fourier transform infrared spectroscopy and thermogravimetric analysis. In the next step, the developed hybrid materials were used as functional admixtures in cement mixtures, thus contributing to the formation of a modern, sustainable building material. How the original components and hybrid materials affected the mechanical properties of the resulting mortars was investigated. The admixture of biopolymers, especially lignin, led to cement composites characterized by greater plasticity, while alumina improved their strength properties. It was confirmed that the system containing 0.5 wt.% of alumina-lignin material is the most suitable for application as a cement mortar admixture.

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Section: Introductionmentioning

confidence: 99%

Lignin-Based Hybrid Admixtures and their Role in Cement Composite Fabrication

et al. 2019

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“…The permeate stream is sent to adsorption columns were a clear separation by families: acids, aldehydes, ketones is achieved ( Fig. 11) [41]. Proper elution allows enriched fractions of the compounds of interest and finally extraction/crystallization processes lead to the final product (vanillin or syringaldehyde) [42].…”

Section: Biorefineries and Lignin Valorizationmentioning

confidence: 99%

“…11) [41]. Proper elution allows enriched fractions of the compounds of interest and finally extraction/crystallization processes lead to the final product (vanillin or syringaldehyde) [42]. There is room here to implement cyclic adsorption processes using some kind of multi-column technology.…”

Section: Biorefineries and Lignin Valorizationmentioning

confidence: 99%

Chemical engineering and environmental challenges. Cyclic adsorption/reaction technologies: Materials and process together!

Rodrigues

2020

Journal of Environmental Chemical Engineering

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“…The mean flow pore diameter is such that half of the flow is evacuated through pores larger than the mean pore diameter. 6 The air permeability was tested over a pressure range of 1 to 30 kPa on dry samples. To measure water permeability, a special setup consisting in a metallic liquid tank was used.…”

Section: Pore Size Distribution and Air And Water Permeabilitymentioning

confidence: 99%

Lignin Particles for Multifunctional Membranes, Antioxidative Microfiltration, Patterning, and 3D Structuring

Cusola

Rojas

Roncero

2019

ACS Appl. Mater. Interfaces

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We introduce a new type of particle-based membrane based on the combination of lignin colloids (LP) and cellulose nanofibrils (CNF), the latter of which are introduced in small volume fractions to act as networking and adhesive agent. The synergies that are inherent to lignin and cellulose in plants are re-engineered to render materials with low surface energy (contact angle measurements) and that can be rendered water resistant with the aid of wet-strength agents (WSA). Importantly, they are most suitable for anti-oxidative separation (ABTS •+ radical inhibition): membranes with uniform porous structures (air permeability and capillary flow porosimetry) allow effluent oxidation at 95 mL/cm 2 , demonstrating, for the first time, the use of unmodified lignin particles in flexible membranes for active microfiltration. Moreover, the membranes are found to be non-fouling (protein adhesion and activity rate). The inherent properties of lignin, including UV radiation blocking capacity (UV transmittance analysis) and reduced surface energy are further exploited in the development of tailorable and self-standing architectures that are almost entirely comprised of non-bonding LP (solids content as high as 92 w/w%). Despite such composition, the materials develop high toughness (oscillatory dynamic mechanical analysis), owing to the addition of minor amounts of CNF. Multifunctional materials based on thin films (casting), 3D structures (molding) and patterned geometries (extrusion deposition) are developed as a demonstration of the potential use of lignin particles as precursor of new material generation. Remarkably, our observations hold for spherical LPs since a much poorer performance was observed after using amorphous powder, indicating the role of size and shape in related applications.

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Lignin biorefinery: Separation of vanillin, vanillic acid and acetovanillone by adsorption

Cited by 41 publications

References 69 publications

Lignin-Based Hybrid Admixtures and their Role in Cement Composite Fabrication

Lignin-Based Hybrid Admixtures and their Role in Cement Composite Fabrication

Chemical engineering and environmental challenges. Cyclic adsorption/reaction technologies: Materials and process together!

Lignin Particles for Multifunctional Membranes, Antioxidative Microfiltration, Patterning, and 3D Structuring

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