Assessment of the papermaking potential of processed Miscanthus × giganteus stalks using alkaline pre-treatment and hydrodynamic cavitation for delignification

Tsalagkas, Dimitrios; Börcsök, Zoltán; Pásztory, Zoltán; Gogate, Parag R.; Csóka, Levente

doi:10.1016/j.ultsonch.2021.105462

Cited by 20 publications

(12 citation statements)

References 59 publications

(59 reference statements)

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“…The overview of the world literature on alternative cellulose sources has demonstrated that despite the diversity of Miscanthus species and their habitats [ 47 , 48 , 49 , 50 , 51 , 52 , 53 ], as well as their wide applications ranging from paper industry to biosynthesis products [ 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 ], the information on Miscanthus cellulose as the substrate for chemical functionalization into CN is presently quite limited, except for the authors’ single studies.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Production of Cellulose Nitrates and Bacterial Cellulose from Lignocellulose of Energy Crop

Kashcheyeva,

Korchagina,

Gismatulina

et al. 2023

Polymers

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This study is focused on exploring the feasibility of simultaneously producing the two products, cellulose nitrates (CNs) and bacterial cellulose (BC), from Miscanthus × giganteus. The starting cellulose for them was isolated by successive treatments of the feedstock with HNO3 and NaOH solutions. The cellulose was subjected to enzymatic hydrolysis for 2, 8, and 24 h. The cellulose samples after the hydrolysis were distinct in structure from the starting sample (degree of polymerization (DP) 1770, degree of crystallinity (DC) 64%) and between each other (DP 1510–1760, DC 72–75%). The nitration showed that these samples and the starting cellulose could successfully be nitrated to furnish acetone-soluble CNs. Extending the hydrolysis time from 2 h to 24 h led to an enhanced yield of CNs from 116 to 131%, with the nitrogen content and the viscosity of the CN samples increasing from 11.35 to 11.83% and from 94 to 119 mPa·s, respectively. The SEM analysis demonstrated that CNs retained the fiber shape. The IR spectroscopy confirmed that the synthesized material was specifically CNs, as evidenced by the characteristic frequencies of 1657–1659, 1277, 832–833, 747, and 688–690 cm−1. Nutrient media derived from the hydrolyzates obtained in 8 h and 24 h were of good quality for the synthesis of BC, with yields of 11.1% and 9.6%, respectively. The BC samples had a reticulate structure made of interlaced microfibrils with 65 and 81 nm widths and DPs of 2100 and 2300, respectively. It is for the first time that such an approach for the simultaneous production of CNs and BC has been employed.

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Section: Introductionmentioning

confidence: 99%

Simultaneous Production of Cellulose Nitrates and Bacterial Cellulose from Lignocellulose of Energy Crop

Kashcheyeva,

Korchagina,

Gismatulina

et al. 2023

Polymers

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“…Xylan was the major component of the hemicellulose fraction and present in considerably higher proportions (23.1%) than in other materials (e.g., 8.4% in eucalyptus wood or 17.3% in sugarcane bagasse) [81]. The proportion of lignin in Elephant grass (20.9%) was higher than those in other residual grass materials such as wheat straw, tricolor sorghum, or corn stover (18.6%) [73], but slightly lower than those of grass species such as M. Giganteus and sugarcane bagasse, and wood species such as eucalyptus (26.9%), poplar (25.2%), and leucaena (24%) [75,77,82,83]. Finally, the lignin contents of elephant straw were similar to those of other raw materials such as rice straw (15-25%) [84,85] and fell in the overall ranges for grass species (10-30%) [73].…”

Section: Chemical and Energy Characterizationmentioning

confidence: 99%

Cold alkaline extraction of Elephant grass for optimal subsequent extraction of hemicelluloses and energy production

García

Alfaro

Loaiza

et al. 2022

Biomass Conv. Bioref.

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There is growing scientific and industrial interest in obtaining useful substances by fractionating lignocellulosic biomass from non-food plant crops for use by the bioenergy industry. The primary goals are to ensure process sustainability and to comply with the principles of circular economy. In this work, we optimized energy production from Elephant grass by previously using cold alkaline extraction to remove its hemicellulose fraction. Elephant grass contains a high proportion of lignin (20%) and hemicelluloses (27.4%), and therefore is an excellent alternative to wood materials for energy production by direct burning. Energy production was optimized to identify the best operating conditions among those tested, namely: alkali concentrations of 80–120 g NaOH L–1, temperatures of 20–40 °C, and treatment times of 30–90 min. Using the optimum conditions thus established (viz., 100 g NaOH L–1, 30 °C, and 30 min) raised the high heating value (HHV) to 19.151 MJ kg–1 (i.e., by 4% relative to the starting material). Also, it allowed the content in elemental C to be preserved, that in H increased by 4.86% and, more environmentally significant, most sulphur (46.9%) to be removed from the solid phase upon treatment. Cold alkaline extraction of the raw material additionally enabled relatively selective separation of the hemicellulose fraction from the cellulose and lignin fractions. Thus, 30.1% of all hemicellulose was dissolved in the treatment liquor and made valorizable while 93.0% of cellulose and 82.1% of lignin present in the raw material remained in the solid phase.

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“…Despite the wide use of non-rotational reactors in numerous applications due to their structural versatility and ease of use, their effectiveness was considered unsatisfactory as they present considerable pressure losses due to severely restricted flow (Šarc et al 2018 ; Tasalagkas et al 2021 ).…”

Section: Hydrodynamic Cavitationmentioning

confidence: 99%

“…5.0 Ganesan et al 2020 Sugarcane bagasse (10 mesh) Vortex based cavitation device Biomass slurry (Mixed with catalyst and circulated in a closed loop) Solid loading 1% w/v, 1.2m 3 /h, 100 passes at 30 °C, 0.75 M NaOH, 60 min Lignin removal 77.4%, 75.5% ± 1.9 g/L glucose was released with 70.3% Cellulose hydrolysis, hemicellulose conversion 69.4% Nalawade et al 2020 Wheat straw (< 0.05 mm) ARHCR Biomass slurry (Mixed with catalyst and circulated in a closed loop) 3000 rpm, 50 °C, 0.4% NaOH, solid–liquid ratio 1:50, 30 min Lignin removal 24.05% Lauberte et al 2021 Miscanthus × giganteus stalks (5 mm) ARHCR Biomass slurry (Mixed with catalyst and circulated in a closed loop) 0.3 M KOH, 2200 rpm, 20 min, 7% solid loading, Room Temperature Lignin removal 41.54%. Paper with Tensile index 24.88 N m/g, burst index at 0.92 kPa m 2 /g Tsalagkas et al, 2021 …”

Section: Hydrodynamic Cavitation Applied To Lignocellulosic Biomass P...mentioning

confidence: 99%

Hydrodynamic cavitation for lignocellulosic biomass pretreatment: a review of recent developments and future perspectives

Bimestre

Júnior

Canettieri

et al. 2022

Bioresour. Bioprocess.

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The hydrodynamic cavitation comes out as a promising route to lignocellulosic biomass pretreatment releasing huge amounts of energy and inducing physical and chemical transformations, which favor lignin–carbohydrate matrix disruption. The hydrodynamic cavitation process combined with other pretreatment processes has shown an attractive alternative with high pretreatment efficiency, low energy consumption, and easy setup for large-scale applications compared to conventional pretreatment methods. This present review includes an overview of this promising technology and a detailed discussion on the process of parameters that affect the phenomena and future perspectives of development of this area.

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Assessment of the papermaking potential of processed Miscanthus × giganteus stalks using alkaline pre-treatment and hydrodynamic cavitation for delignification

Cited by 20 publications

References 59 publications

Simultaneous Production of Cellulose Nitrates and Bacterial Cellulose from Lignocellulose of Energy Crop

Simultaneous Production of Cellulose Nitrates and Bacterial Cellulose from Lignocellulose of Energy Crop

Cold alkaline extraction of Elephant grass for optimal subsequent extraction of hemicelluloses and energy production

Hydrodynamic cavitation for lignocellulosic biomass pretreatment: a review of recent developments and future perspectives

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