Characteristics, Industrial Sources, and Utilization of Lignins from Non-Wood Plants

Lora, Jairo H.

doi:10.1007/978-1-4615-0643-0_14

Cited by 13 publications

(9 citation statements)

References 19 publications

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“…Lignin is a byproduct from the pulp and paper industries and contains more than 60% carbon. Approximately 70 million tons of lignin are produced every year [16], mainly used as fuel. Lignin has many potential value-added applications, including the manufacture of carbon fibers and graphene [17].…”

Section: Introductionmentioning

confidence: 99%

Temperature and Copper Concentration Effects on the Formation of Graphene-Encapsulated Copper Nanoparticles from Kraft Lignin

et al. 2017

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The effects of temperature and copper catalyst concentration on the formation of graphene-encapsulated copper nanoparticles (GECNs) were investigated by means of X-ray diffraction, Fourier transform infrared spectroscopy-attenuated total reflectance, and transmission electron microscopy. Results showed that higher amounts of copper atoms facilitated the growth of more graphene islands and formed smaller size GECNs. A copper catalyst facilitated the decomposition of lignin at the lowest temperature studied (600 °C). Increasing the temperature up to 1000 °C retarded the degradation process, while assisting the reconfiguration of the defective sites of the graphene layers, thus producing higher-quality GECNs.

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Section: Introductionmentioning

confidence: 99%

Temperature and Copper Concentration Effects on the Formation of Graphene-Encapsulated Copper Nanoparticles from Kraft Lignin

et al. 2017

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“…Particularly sulfur-free lignins extracted from nonwood fibers are potential raw materials for new industrial applications . Furthermore, it is known that nonwood lignins are more complex than wood lignins in chemical composition, consisting of significant amounts of p -hydroxyphenylpropane units . Thus, nonwood lignins may have suitable material properties for packaging material applications.…”

Section: Introductionmentioning

confidence: 99%

Increased Water Resistance of CTMP Fibers by Oat (Avena sativa L.) Husk Lignin

et al. 2010

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The insertion of oat husk lignin onto chemithermomechanical pulp (CTMP) fibers was studied to increase fiber hydrophobicity. The pretreated pulp samples were subsequently used for preparation of handsheets for characterization. Treatment of CTMP with laccase in the presence of oat husk lignin resulted in a significant increase in hydrophobicity of the handsheet surface, as indicated by dynamic contact angle analysis. Water absorption time of 8 s was obtained with initial contact angle of 118°. Although the handsheet's brightness was reduced by 33%, tensile index was only subtly decreased. Neither laccase nor oat husk lignin alone gave much improved water absorption times. Therefore, handsheets made of laccase-treated pulp with and without oat husk lignin were further examined by XPS, which suggested that both laccase and oat husk lignin were inserted onto CTMP fibers. The oat husk lignin was distributed as heterogeneous aggregates on the handsheet surface whereas laccase was uniformly distributed. Evidence was obtained that the adsorbed laccase layer formed a noncovalent base for the insertion of oat husk lignin onto fiber surfaces.

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“…[54] Aspen is classified as hardwood, whose lignin is known to have mostly guaiacyl and syringyl-based monomers, [55] while all the monomers (guaiacyl, syringyl, and p-hydroxyphenyl) exist in grass lignin, [56] sugarcane bagasse, [57] and wheat straw. [58] The higher relative abundance of syringols compared to the other Hlignins might be due to the composition of native lignin in aspen wood. Monolignols were found only in small amounts since the lignin tested was exclusively separated lignin.…”

Section: Pyrolysis Of Hydrolysis Lignin (H-lignin)mentioning

confidence: 99%

Effect of bed material, lignin content, and origin on the processability of biomass in fast pyrolysis reactors

2017

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Lignin has great potential for the production of valuable aromatic compounds and has attracted considerable attention. The development of high value applications for Kraft lignin would boost the profitability of pulp and paper operations. A potential solution is the pyrolytic conversion of lignin to valuable liquids and solids. However, Kraft lignin is a thermally sensitive powder which tends to agglomerate under pyrolysis conditions. A mechanically fluidized reactor (MFR) can be used to monitor both the generation of vapours and gas during pyrolysis and how cohesive a feedstock becomes when pyrolyzed. The MFR was, therefore, used to evaluate alternative solutions to improve Kraft lignin behaviour by mixing it with nonproblematic feedstocks or by modifying its bed material. Finally, Kraft lignin behaviour and products were compared to those of hydrolysis lignins from different origins.

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Characteristics, Industrial Sources, and Utilization of Lignins from Non-Wood Plants

Cited by 13 publications

References 19 publications

Temperature and Copper Concentration Effects on the Formation of Graphene-Encapsulated Copper Nanoparticles from Kraft Lignin

Temperature and Copper Concentration Effects on the Formation of Graphene-Encapsulated Copper Nanoparticles from Kraft Lignin

Increased Water Resistance of CTMP Fibers by Oat (Avena sativa L.) Husk Lignin

Effect of bed material, lignin content, and origin on the processability of biomass in fast pyrolysis reactors

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