Performance da madeira de &lt;i&gt;Acacia mearnsii&lt;/i&gt; De Wild para polpação kraft

Giesbrecht, Bruna Mohr; Coldebella, Rodrigo; Gentil, Marina; Nunes, Gabriel Raamon Santana; Finger, Matheus Redel; Jardim, Juliana Marangon; Pedrazzi, Cristiane; Cardoso, Gabriel Valim

doi:10.5902/1980509850295

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…Lignocellulosic biomass with high acetyl groups (determined here as acetates) will lead to higher consumption of reagents upon their hydrolyzation in an alkaline medium [30]. The high glucose and xylose (the latter two-times higher than previously observed) [31] and low lignin contents (with low Klason lignin 18.3%) show good perspectives for the pulping of A. mearnsii. A. longifolia, on the other end, showed the exact opposite, with higher lignin and lower polysaccharide contents than the remaining Acacia species.…”

Section: Wood Chemical Compositionmentioning

confidence: 84%

“…Similar results were presented previously for A dealbata and A. melanoxylon wood [13,18,19], with pulp yields above 50% and Kappa numbers below 17. Being widely planted in Brazil, mostly for bark tannin production, the wood of A. mearnsii has also been tested for pulp production, with pulp yields (57%-47%) and Kappa numbers (all below 17%) presented for a vast active alkali range [31]. To the best of our knowledge, no previous pulping study for A. saligna and A. longifolia woods was found.…”

Section: Kraft Pulping Experimental Design and Optimizationmentioning

confidence: 99%

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Encouraging Invasive Acacia Control Strategies by Repurposing Their Wood Biomass Waste for Pulp and Paper Production

Neiva,

Godinho,

Simões

et al. 2024

Forests

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Concerns on the expanding infestation of several Acacia species in the southern Mediterranean European countries have triggered an ever-growing requirement for costly targeted control actions. Valorizing biomass waste produced could help promote and better finance these actions. For that purpose, wood wastes from invasive control actions were tested regarding their pulp and paper potential, aiming to entice cellulose industries to partake in future conservation actions. Wood waste from the five most pervasive Acacia species was studied (Acacia dealbata Link, Acacia longifolia Willd, Acacia mearnsii De Wild, Acacia melanoxylon R.Br, and Acacia saligna Labill) regarding physical and chemical characteristics, and a central composite design was used to optimize alkali charge and reaction temperature on pulping yield and delignification. Bleached kraft pulps were produced with each species’ optimized conditions and for an equitable mixture of all species. Optimized pulp yields (52.6%–53.5%) and pulp polymerization degree (2867–3690) of Acacia species were higher than those of Eucalyptus globulus Labill (used as reference). Optimized bleached pulps were refined and fiber, pulp, and handsheet properties determined. Acacia dealbata and A. longifolia presented high specific wood consumption and lower handsheet strength properties, pointing to overall lower pulping potential, while A. melanoxylon and A. mearnsii characteristics were equal to or higher than those of E. globulus. A. saligna pulp and handsheet characteristics appear more suited for tissue paper. The Acacia mixture achieved acceptable characteristics, enabling the indiscriminate use of Acacia wood regardless of the species. As a shortcoming, the Acacia pulps showed the worst optical characteristics, with brightness dropping substantially with beating (64%–76%) when compared to E. globulus (81%).

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Section: Wood Chemical Compositionmentioning

confidence: 84%

Section: Kraft Pulping Experimental Design and Optimizationmentioning

confidence: 99%

Encouraging Invasive Acacia Control Strategies by Repurposing Their Wood Biomass Waste for Pulp and Paper Production

Neiva,

Godinho,

Simões

et al. 2024

Forests

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“…The contents of extractives for ST raw material are the highest of the other lignocellulosic materials; empty fruit bunch (EFB) raw material (5.9%), sugarcane bagasse (SB) raw material (2.0%), and Acacia mangium wild wood (6.7%) as plantation hardwoods for a resource of paper production [19]. c Acacia mangium wild [19] The chemical composition of ST is compared to other tree lignocellulosic materials such empty fruit bunches (EFB) [8], sugarcane bagasse as a biomass resource for agricultural waste [7], and Acacia mearnsii wood as a plantation hardwood for papermaking [19]. With a high cellulose percentage of 58.1%, the comparison revealed that ST is a resource with a lot of potential.…”

Section: Resultsmentioning

confidence: 99%

Dissolving Pulp from Sansevieria Trifasciata Fiber Processed with Water-Pre-Hydrolysis, Soda-Anthraquinone Cooking and Clorine Free Bleaching<i> </i>

Yusnimar,

Khairat,

Drastinawati

et al. 2024

MSF

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For a long time, rayon has been produced using dissolving pulp (DP). DP is typically made from wood or cotton, but it takes a long time to collect wood, and high-quality cotton must be imported from afar. Sansevieria trifasciata (ST) fiber, which contains more than 50% cellulose, offers potential as a raw material and a substitute for cotton and wood. It is simple to develop and grow. It can endure a wide range of light and temperature conditions. By using the water-pre-hydrolysis, soda-Anthraquinone cooking (soda-AQ), and elementary-chlorine-free (ECF) bleaching sequences, this work aims to convert ST into DP. Results, The DP was produced with a yield of 43.69%, a kappa value of 4.73, a viscosity of 9.3 cP, an alpha-cellulose content of 97.7% and a brightness of 90.7%, which was higher than the ISO brightness of 88%. The DP quality corresponds to the minimum DP level for rayon according to the Indonesian National Standard (SNI). It is very promising for further development, such as being used for viscose fiber production.

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“…Acacia mearnsii wood, due to its basic density of approximately 0.544 g/cm 3 and low lignin content, can produce pulps with high yield and easy bleachability, being indicated for the production of tissue paper, partly, because it presents anatomical elements with lower mechanical strength when compared to Eucalyptus genus woods (GIESBRECHT et al, 2022;SANTOS et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Anatomical characterization of black wattle wood for the pulp and paper production

et al. 2023

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The growing worldwide demand in the pulp market has fostered research that evaluates alternative fiber sources with specific characteristics that attend the needs of the consumer market, with a view to add value to the final product and reduce production costs. Acacia mearnsii De Wild wood is a by-product of the extraction of tannin from the trunk bark, used for firewood, charcoal and pellets. However, its wood is still poorly studied, especially its anatomical characteristics, which can provide important information about its industrial potential. This study evaluated the anatomical characteristics of Acacia mearnsii wood for the production of pulp and paper. Ten trees at approximately seven years old were cut down, five from the seed production area (SPA) and five from the clonal population area (CPA). From each tree, one trunk disc was sectioned at the diameter at breast height (DBH), resulting in 10 (ten) wood samples. From each disc, a sapwood specimen was made oriented in the tangential longitudinal, radial longitudinal and transversal planes, for later obtaining the anatomical cuts and the macerates. The anatomical description of the wood followed the recommendations of the International Association of Wood Anatomists-IAWA. From the dimensions of the fibers, their quality evaluation ratios for the production of pulp and paper were calculated. Results obtained from the anatomical characterization allowed to conclude that the Acacia mearnsii woods from SPA and CPA are indicated as a source of raw material for the pulp and paper production.

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Performance da madeira de <i>Acacia mearnsii</i> De Wild para polpação kraft

Cited by 5 publications

References 17 publications

Encouraging Invasive Acacia Control Strategies by Repurposing Their Wood Biomass Waste for Pulp and Paper Production

Encouraging Invasive Acacia Control Strategies by Repurposing Their Wood Biomass Waste for Pulp and Paper Production

Dissolving Pulp from Sansevieria Trifasciata Fiber Processed with Water-Pre-Hydrolysis, Soda-Anthraquinone Cooking and Clorine Free Bleaching<i> </i>

Anatomical characterization of black wattle wood for the pulp and paper production

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