Evaluation of Combined Dilute Acid-Kraft and Steam Explosion-Kraft Processes as Pretreatment for Enzymatic Hydrolysis of Pinus radiata Wood Chips

Reyes, Pablo; Márquez, Nicole; Troncoso, Eduardo; Parra, Carolina; Mendonça, Regis Teixeira; Rodrı́guez, Jaime

doi:10.15376/biores.11.1.612-625

Cited by 7 publications

(13 citation statements)

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“…Kraft pulping is the most used process for wood delignification in the pulp and paper industry, accounting for more than 80% of cellulosic pulp produced worldwide [12,21]. The main active agents in the kraft process are hydroxide and hydrosulfide anions, which are present in the cooking liquor at reaction temperatures between 150-170 • C and cause mainly the cleavage of α-O-4 and β-O-4 bonds in lignin and more than 90% of delignification takes place if the process is oriented to the production of bleachable-grade cellulose [17,33,34].…”

Section: Kraft Ligninmentioning

confidence: 99%

A Review on the Lignin Biopolymer and Its Integration in the Elaboration of Sustainable Materials

Vásquez-Garay¹,

Carrillo-Varela

Vidal

et al. 2021

Sustainability

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Lignin is one of the wood and plant cell wall components that is available in large quantities in nature. Its polyphenolic chemical structure has been of interest for valorization and industrial application studies. Lignin can be obtained from wood by various delignification chemical processes, which give it a structure and specific properties that will depend on the plant species. Due to the versatility and chemical diversity of lignin, the chemical industry has focused on its use as a viable alternative of renewable raw material for the synthesis of new and sustainable biomaterials. However, its structure is complex and difficult to characterize, presenting some obstacles to be integrated into mixtures for the development of polymers, fibers, and other materials. The objective of this review is to present a background of the structure, biosynthesis, and the main mechanisms of lignin recovery from chemical processes (sulfite and kraft) and sulfur-free processes (organosolv) and describe the different forms of integration of this biopolymer in the synthesis of sustainable materials. Among these applications are phenolic adhesive resins, formaldehyde-free resins, epoxy resins, polyurethane foams, carbon fibers, hydrogels, and 3D printed composites.

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Section: Kraft Ligninmentioning

confidence: 99%

A Review on the Lignin Biopolymer and Its Integration in the Elaboration of Sustainable Materials

Vásquez-Garay¹,

Carrillo-Varela

Vidal

et al. 2021

Sustainability

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Section: Microscopic Characterisation Of Pre-treated Materialsmentioning

confidence: 99%

“…The images revealed how the fibrous surface of the pre-treated material changed as the S0 of pre-treatments increased from 8.5 to 12.3 (Figure 2). The sudden depressurisation leads to an "explosion" of the steam inside the lignocellulosic matrix, which promotes the breakdown and defibrillation of its structure, hydrolysis of the hemicellulose, and depolymerisation/repolymerisation of lignin [28,30]. As the severity factor of SE pre-treatment increased, the SEM micrographs of the pre-treated The sudden depressurisation leads to an "explosion" of the steam inside the lignocellulosic matrix, which promotes the breakdown and defibrillation of its structure, hydrolysis of the hemicellulose, and depolymerisation/repolymerisation of lignin [28,30].…”

Section: Microscopic Characterisation Of Pre-treated Materialsmentioning

confidence: 99%

Effects on Lignin Redistribution in Eucalyptus globulus Fibres Pre-Treated by Steam Explosion: A Microscale Study to Cellulose Accessibility

et al. 2021

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The objective of this study was to investigate structural changes and lignin redistribution in Eucalyptus globulus pre-treated by steam explosion under different degrees of severity (S0), in order to evaluate their effect on cellulose accessibility by enzymatic hydrolysis. Approximately 87.7% to 98.5% of original glucans were retained in the pre-treated material. Glucose yields after the enzymatic hydrolysis of pre-treated material improved from 19.4% to 85.1% when S0 was increased from 8.53 to 10.42. One of the main reasons for the increase in glucose yield was the redistribution of lignin as micro-particles were deposited on the surface and interior of the fibre cell wall. This information was confirmed by laser scanning confocal fluorescence and FT-IR imaging; these microscopic techniques show changes in the physical and chemical characteristics of pre-treated fibres. In addition, the results allowed the construction of an explanatory model for microscale understanding of the enzymatic accessibility mechanism in the pre-treated lignocellulose.

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“…1 (Kojima et al, 2014;Antes and Joutsimo, 2015;Neiva et al, 2015;Zhou et al, 2015;Gallina et al, 2016;Hou et al, 2016;Pinto et al, 2016;Poletto, 2016) 2 (Ataç and Eroǧlu, 2013;Gulsoy and Tufek, 2013;Xiang and He, 2013;Cotana et al, 2014;Herrera et al, 2014;Castillo et al, 2015;Gulsoy and Ozturk, 2015;Reyes et al, 2016;Valenzuela et al, 2016) Gambar 3. (Sixta, 2008).…”

Section: Rendemen Pulp Belum Putih Bambu Dekortikasimentioning

confidence: 99%

Pembuatan dan Karakterisasi Dissolving Pulp Serat Panjang dari Bambu Duri (Bambusa blumeana)

Purwita

Sugesty

2018

J selulosa

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Preparation and Characterization of Long Fiber Dissolving Pulp from Spiny Bamboo (Bambusa blumeana)The need for long fiber dissolving pulp in Indonesia can only be met from imports. Bamboo is a nonwood plant and known as source of long fiber. This research aims to study the potential of spiny bamboo to be used as raw material for producing long fiber dissolving pulp. This research was conducted using two different types of raw materials preparation to produce bamboo chip and decorticated bamboo. The pulping process is carried out by pre-hydrolysis kraft and bleaching performed with two different bleaching sequences, i.e Do ED1 D2 and Do EpD1 D2 . Based on the experimental results, spiny bamboo has good potential to be used as raw material for dissolving pulp. Spiny bamboo belongs to long fibers with an average fiber length of 2.46 mm. The dissolving quality depends on the preparation of the raw material and the bleaching sequence. The yield of spiny bamboo dissolving pulp ranged from 37.97 - 40.76% with alpha cellulose content of 94.88 - 98.67%, and viscosity of 16.43 - 25.75 cP. Decorticated bamboo with bleaching sequence of Do EpD1 D2 produced the highest quality of dissolving pulp with the highest brightness and alpha cellulose were 89.61% ISO and 98.67%, respectively.AbstrakKebutuhan dissolving pulp serat panjang di Indonesia hanya dapat dipenuhi melalui impor. Bambu adalah tanaman nonkayu dan dikenal sebagai sumber serat panjang. Penelitian ini bertujuan untuk mempelajari potensi bambu duri untuk dijadikan bahan baku pembuatan dissolving pulp serat panjang. Penelitian ini dilakukan dengan dua jenis persiapan bahan baku yang berbeda untuk menghasilkan serpih bambu dan bambu dekortikasi. Proses pemasakan dilakukan dengan proses pra-hidrolisis kraft dan pemutihan dilakukan dengan dua urutan pemutihan yang berbeda, yaitu DoED1D2 dan DoEpD1D2. Berdasarkan hasil penelitian, bambu duri memiliki potensi yang baik untuk digunakan sebagai bahan baku pembuatan dissolving pulp. Bambu duri tergolong serat panjang dengan panjang serat rata-rata 2,46 mm. Kualitas dissolving pup yang dihasilkan tergantung dari persiapan bahan baku dan urutan pemutihan. Rendemen dissolving pulp bambu duri berkisar 37,97 - 40,76%, dengan kandungan selulosa alfa 94,88 - 98,67%, dan viskositas 16,43 - 25,75 cP. Bambu dekortikasi dengan urutan pemutihan DoEpD1D2 menghasilkan dissolving pulp paling unggul dengan derajat cerah dan selulosa alfa tertinggi berturut-turut 89,61 %ISO dan 98,67%.Kata kunci: dissolving pulp, bambu duri (Bambusa blumeana), serpih bambu, bambu dekortikasi, prahidrolisis kraft

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Evaluation of Combined Dilute Acid-Kraft and Steam Explosion-Kraft Processes as Pretreatment for Enzymatic Hydrolysis of Pinus radiata Wood Chips

Cited by 7 publications

References 0 publications

A Review on the Lignin Biopolymer and Its Integration in the Elaboration of Sustainable Materials

A Review on the Lignin Biopolymer and Its Integration in the Elaboration of Sustainable Materials

Effects on Lignin Redistribution in Eucalyptus globulus Fibres Pre-Treated by Steam Explosion: A Microscale Study to Cellulose Accessibility

Pembuatan dan Karakterisasi Dissolving Pulp Serat Panjang dari Bambu Duri (Bambusa blumeana)

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