Results 21 to 30 of about 1,591 (176)
BioResources, 2023 Effects of pre-treating pine kraft pulp kappa number 31.5 with peracetic acid (Paa) (0.33% and 0.66% as active oxygen based on oven-dried pulp) before O2-delignification were studied relative to the consumption of chlorine dioxide in a subsequent ...
Dariusz Danielewicz
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BioResources, 2013 The main challenge in the oxygen delignification process is the improvement of selectivity. To further understand the effect of the amount of hydroxyl radicals on the selectivity of oxygen delignification, in this work, the hydroxyl radicals were generated by the improved Fenton reaction system and were quantified by UV spectrophotometry.
Shilin Cao +5 more
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Efeito dos ácidos hexenurônicos e da lignina no desempenho da ozonólize, em diferentes pHs da reação
Química Nova, 2006 The effect of pH on the performance of the ozonolysis stage in pulp production was evaluated for conventional and acid treated brown and oxygen delignified eucalyptus kraft pulps.
Ventorim Gustavo, Colodette Jorge Luiz
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Mill experience of oxygen delignification.
JAPAN TAPPI JOURNAL, 1988 The M-C oxygen delignification system for the eucalyptus line of our mill has started operation in January 1986.The Kappa number and viscosity reduction are around 49 % and 19% respectively.Also, the good results are shown in terms of brightness and dirt content.Whereas, the reduction of total effective chlorine consumption and COD in the bleaching ...
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Machine‐Learning‐Enabled Wood with Nanopump Functionalization for Solar Interfacial Evaporation
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.This study employed machine learning to design an iron‐cobalt‐carbon‐wood photothermal material, achieving high‐efficiency evaporation at 2.807 kg m−2 h−1 and excellent salt resistance. The integrated system increased the daily water production efficiency of solar distillation by 1.5 times, providing an innovative solution for sustainable seawater ...
Chaohai Wang +10 more
wiley +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.This study investigates Spanish broom (Spartium junceum) as a renewable source for electrospun composite membranes in sustainable water purification. MCC and biochar were functionalized with eco‐friendly precursors and nanomaterials (i.e., HNT, β‐CDs) to develop hybrid PVA nanofiber composites.
Giulia Rando +7 more
wiley +1 more source
Dimensionless Parameter Approach For Oxygen Delignification Kinetics
Industrial & Engineering Chemistry Research, 2008 In this study, the kinetic analysis of oxygen delignification of Turkish southern hardwood Kraft pulp was carried out. The kinetic rate data were collected in a high pressure batch reactor at industrially significant conditions of temperature, alkali charge, and oxygen partial pressure.
Dogan, Ismail, Gueruez, Gueniz
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Ciência Florestal, 2014 http://dx.doi.org/10.5902/1980509813337This study aimed to evaluate the sensitiveness of the information obtained for the residual lignin from Eucalyptus grandis kraft pulps analyzed through the nitrobenzene oxidation, copper oxide (CuO) reduction and ...
Gustavo Ventorim +4 more
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Food Biomacromolecules, EarlyView.Agri‐food wastes and by‐products are transformed into sustainable biopolymer composites through extraction, modification, and advanced fabrication technologies. These value‐added materials exhibit enhanced mechanical, barrier, antimicrobial, and biodegradable properties, enabling applications in food packaging, edible coatings, and preservation systems
Samuel Ayofemi Olalekan Adeyeye +1 more
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Impact of dissolved matter in the oxygen delignification stage
TAPPI Journal, 2017 The presence of dissolved matter in the pulp suspension in an oxygen (O2) delignification stage, consisting mainly of dissolved lignin, is normally considered to negatively affect the delignification rate due to the competing reactions between the fiber bound lignin and the lignin dissolved in the filtrate.
Caroline Wilke +2 more
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