Antagonistic, synergistic and interaction effects of process parameters during oxygen delignification of Melia dubia kraft pulp

Anupam, Kumar; Deepika,; Swaroop, Vinay; Lal, Priti Shivhare

doi:10.1016/j.jclepro.2018.07.125

Cited by 22 publications

(3 citation statements)

References 18 publications

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“…The final brightness achieved in the E. crassipes pulp was low with high opacity (Table 7), and its use may not be viable due to the number of stages applied in the bleaching sequence. However, the final brightness was high compared to that reported for Melia dubia kraft pulp (42.5%) (Anupam et al 2018). On the other hand, several papers and paperboards on the market, such as those used for packaging, do not require bleached cellulosic pulp.…”

Section: Brightness Opacity and Viscosity In Bleached Kraft Pulpmentioning

confidence: 65%

Kraft pulping and bleaching of Eichhornia crassipes (Mart.) Solms (water hyacinth)

Pintor-Ibarra

Rivera-Prado

Ramos-Vargas

et al. 2020

BioRes

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Eichhornia crassipes (water hyacinth) was pulped by means of a kraft pulping process with reagent loads of 10 and 20% on a dry matter basis to determine yield, rejects, kappa number, and ash. Fiber classification, brightness, opacity, and viscosity were measured in the brown pulp. Bleaching was performed by means of an O1O2D1(PO)D2HD3 sequence. Yield, kappa number, pH, ash, brightness, opacity, and viscosity were evaluated in the bleached pulp. Finally, a microanalysis of inorganic elements was carried out in both the bleached and unbleached pulp ash. The highest kraft pulp yield was 26.4%, with a 10% reagent load at 120 °C and 30 minutes cooking. It was determined that E. crassipes cellulosic pulp contains large amounts of fines. Results of the bleaching sequence indicate low brightness (58.0 %) and low viscosity (6.43 cP). The most abundant inorganic elements in the ash of both bleached and unbleached pulp were Ca, Mg, P, and Si. These results suggest that E. crassipes biomass might complement cellulosic fibers in pulping processes of low yield, such as the wood fibers used to produce handmade paper.

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Section: Brightness Opacity and Viscosity In Bleached Kraft Pulpmentioning

confidence: 65%

Kraft pulping and bleaching of Eichhornia crassipes (Mart.) Solms (water hyacinth)

Pintor-Ibarra

Rivera-Prado

Ramos-Vargas

et al. 2020

BioRes

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“…50 Furthermore, the increase in alkali enhanced the brightness of the pulp, related to the decrease in lignin content. 51 The different pretreated pulps ( A , B , and C ) with lignin percentages of 5.6, 4.1, and 3% were used as raw materials to produce different materials, as described in the following sections.…”

Section: Resultsmentioning

confidence: 99%

Upcycling agro-industrial blueberry waste into platform chemicals and structured materials for application in marine environments

et al. 2022

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“…4-8) being close to 1, establish a good functional relationship between input and output model parameters. The insignificant lack-of-fit implies that the regression models are well fit (Anupam et al 2018 In Eq. 4, the coefficients of XS and XR have a greater influence on the tear index, that is, it gradually increases with an increase of the refining and soda variables.…”

Section: Characterization Of Paper Sheetsmentioning

confidence: 99%

Potential use of green alga Ulva sp. for papermaking

Moral

Aguado

Castelló

et al. 2019

BioRes

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The large amount of cellulose found in Ulva sp. and its low percentage of lignin-like compounds make it an interesting raw material for partially substituting wood pulp to produce pulp and paper. This work shows the suitability of mild chemical treatments for papermaking using residual biomass from this green seaweed, harvested on the beaches, in order to give it added value. A chemical characterization was used to determine ethanol-benzene, hot water, and 1% soda extractives, ash content, holocellulose, α-cellulose, and acid-insoluble material. Cellulose extraction was performed with low proportions of soda and hydrogen peroxide, and it was subjected to a refining step. A design of experiments was used to explain the influence of soda (6%, 8%, and 10%) and hydrogen peroxide (2%, 4%, and 6%) based on oven-dry weight, plus refining (1000 PFI revolutions, 3000 PFI revolutions, and 5000 PFI revolutions). The results showed that to attain good paper strength, it is advisable to operate at maximum alkali charge, minimum peroxide concentration, and refine to a high degree.

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Antagonistic, synergistic and interaction effects of process parameters during oxygen delignification of Melia dubia kraft pulp

Cited by 22 publications

References 18 publications

Kraft pulping and bleaching of Eichhornia crassipes (Mart.) Solms (water hyacinth)

Kraft pulping and bleaching of Eichhornia crassipes (Mart.) Solms (water hyacinth)

Upcycling agro-industrial blueberry waste into platform chemicals and structured materials for application in marine environments

Potential use of green alga Ulva sp. for papermaking

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