Production of dissolving pulp from Eulaliopsis binata with the concept of integrated biorefinery

The Fock test is widely used for assessing the reactivity of dissolving pulp. The objective of this study was to modify the method to improve the repeatability of the test. Various parameters that affect the repeatability of the Fock test were investigated. The results showed that Fock reactivity is dependent on testing conditions affecting the xanthation between cellulose and carbon disulfide, such as the moisture content of the pulp sample, sodium hydroxide (NaOH) concentration, xanthation temperature, carbon disulfide dosage, and xanthation time. The repeatability of the test was significantly improved using the following modified testing procedure: air dried sample in the constant temperature/humidity room, xanthation temperature of 66°F (19°C) in a water bath, xanthation time of 3 h, NaOH concentration of 9% (w/w), and 1.3 mL carbon disulfide.

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Estimating supply and demand elasticities of dissolving pulp, lignocellulose-based chemical derivatives and textile fibres in an emerging forest-based bioeconomy

Forest Policy and Economics ◽

10.1016/j.forpol.2021.102422 ◽

2021 ◽

Vol 126 ◽

pp. 102422 ◽

Cited By ~ 2

Author(s):

Franziska Schier ◽

Christian Morland ◽

Matthias Dieter ◽

Holger Weimar

Keyword(s):

Supply And Demand ◽

Dissolving Pulp ◽

Demand Elasticities ◽

Textile Fibres ◽

Chemical Derivatives

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Optimization of Lignin Recovery from the Pre-Hydrolysate of Kraft-Based Dissolving Pulp Production Processes

Applied Sciences ◽

10.3390/app11010454 ◽

2021 ◽

Vol 11 (1) ◽

pp. 454

Author(s):

Adil Mazar ◽

Naceur Jemaa ◽

Waleed Wafa Al Dajani ◽

Mariya Marinova ◽

Michel Perrier

Keyword(s):

Molecular Weight ◽

Lignin Content ◽

Sulfuric Acid Concentration ◽

Dissolving Pulp ◽

Potential Candidate ◽

Lignin Extraction ◽

Dissolved Organic Matters ◽

Lignin Recovery ◽

Total Lignin ◽

Total Lignin Content

A pre-hydrolysate is an aqueous stream obtained during the production of hardwood kraft dissolving pulp. It is rich in sugars and contains dissolved organic matters. The purpose of this study is to investigate the optimization of lignin recovery from wood pre-hydrolysates and to characterize the extracted lignin. The optimal conditions for lignin extraction have been determined to be (a) a filtration temperature of 40 °C, (b) a sulfuric acid concentration of 8.5 kg·m−3, and (c) a coagulation time of 180 min. Using these conditions, high filtration rates have been obtained and the extracted lignin has a low content of impurities (8.3%), a low molecular weight (1270 Da), and a very low polydispersity (Mw/Mn = 1.22). Compared to kraft lignin, the pre-hydrolysate lignin has a much lower molecular weight and could be a potential candidate for niche applications. A high lignin recovery rate is possible (52% of the total lignin content in the pre-hydrolysate).

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Tunable micro-structure of dissolving pulp-based cellulose nanofibrils with facile prehydrolysis process

Cellulose ◽

10.1007/s10570-021-03760-7 ◽

2021 ◽

Vol 28 (6) ◽

pp. 3759-3773

Author(s):

Yachong Zhu ◽

Chaojun Wu ◽

Dongmei Yu ◽

Qijun Ding ◽

Ronggang Li

Keyword(s):

Cellulose Nanofibrils ◽

Dissolving Pulp ◽

Micro Structure

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Yeast-based biodiesel production using sulfonated carbon-based solid acid catalyst by an integrated biorefinery of durian peel waste

Renewable Energy ◽

10.1016/j.renene.2021.02.146 ◽

2021 ◽

Author(s):

Ratanaporn Leesing ◽

Siraprapha Siwina ◽

Khanittha Fiala

Keyword(s):

Solid Acid ◽

Solid Acid Catalyst ◽

Acid Catalyst ◽

Biodiesel Production ◽

Integrated Biorefinery ◽

Carbon Based

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Synthesis of a sustainable integrated biorefinery to produce value-added chemicals from palm-based biomass via mathematical optimisation

Sustainable Production and Consumption ◽

10.1016/j.spc.2020.10.012 ◽

2021 ◽

Vol 26 ◽

pp. 288-315 ◽

Cited By ~ 2

Author(s):

Tiong Oon Tey ◽

Sharon Chen ◽

Zhi Xiang Cheong ◽

Abigail Shu Xian Choong ◽

Lik Yin Ng ◽

...

Keyword(s):

Value Added ◽

Integrated Biorefinery ◽

Mathematical Optimisation

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Determination of crystallinity of Chinese handmade papers by means of X-ray diffraction

Restaurator International Journal for the Preservation of Library and Archival Material ◽

10.1515/res-2019-0009 ◽

2020 ◽

Vol 41 (2) ◽

pp. 69-86

Author(s):

Peng Liu ◽

Hongbin Zhang ◽

Sinong Wang ◽

Hui Yu ◽

Bingjie Lu ◽

...

Keyword(s):

Negative Influence ◽

X Ray Diffraction ◽

Cross Sectional ◽

X Ray ◽

Eulaliopsis Binata ◽

Different Types ◽

Powder Samples ◽

Xrd Patterns ◽

Xrd Method

AbstractThe crystallinity indices (CrI) of Chinese handmade papers were investigated using the X-ray diffraction (XRD) method. Four Chinese handmade papers, Yingchun, Zhuma, Yuanshu and Longxucao papers were used as model substrates of mulberry bark, ramie, bamboo and Eulaliopsis binata papers, respectively. Two forms of the paper samples, paper sheets and their comminuted powders, were used in this study. The results showed that their XRD patterns belong to the cellulose-I type and Iβ dominates the cellulose microstructure of these paper samples. Moreover, it was found that the microstructures and CrIs of cellulose of these papers were changed by the grinding treatment. This work suggested that the sheet form of the handmade papers is suitable to determine CrI by XRD, despite the contribution of non-cellulosic components in the papers. The order of CrIs for these paper sheet samples was Yingchun, Zhuma, Longxucao and Yuanshu papers. Besides CrIs, differences in cross-sectional areas of the crystalline zone of cellulose can be used for comparing different types of handmade papers. It was also found that the CrIs and crystallite size of paper cellulose varied between the sheet samples and the powder samples, illustrating that the pulverisation has a negative influence on the microstructure of the handmade papers.

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