Results 151 to 160 of about 18,450 (195)
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Bioresource Technology, 2011
Hemicelluloses in industrially produced pre-hydrolysis liquor (PHL) were precipitated with ethanol. These PHL-derived hemicelluloses (PHL-EH) and a commercial, pure birch wood xylan sample (powder form) (BWX) were bleached using chlorine dioxide (D(0) and D(1)) and hydrogen peroxide (Ep) in the D(0)EpD(1) sequence, and the chemical compositions ...
Zehua, Liu +3 more
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Hemicelluloses in industrially produced pre-hydrolysis liquor (PHL) were precipitated with ethanol. These PHL-derived hemicelluloses (PHL-EH) and a commercial, pure birch wood xylan sample (powder form) (BWX) were bleached using chlorine dioxide (D(0) and D(1)) and hydrogen peroxide (Ep) in the D(0)EpD(1) sequence, and the chemical compositions ...
Zehua, Liu +3 more
openaire +2 more sources
Cellulose, 2014
A techno-economic assessment of an upgrading procedure and outtake of a pre-hydrolysate in a presumed dissolving pulp mill was performed. Pre-hydrolysis of spruce wood chips in pilot scale produced input data for energy and mass balances and was performed with and without subsequent membrane filtration to produce hydrolysate fractions rich in ...
Mikael Jansson +4 more
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A techno-economic assessment of an upgrading procedure and outtake of a pre-hydrolysate in a presumed dissolving pulp mill was performed. Pre-hydrolysis of spruce wood chips in pilot scale produced input data for energy and mass balances and was performed with and without subsequent membrane filtration to produce hydrolysate fractions rich in ...
Mikael Jansson +4 more
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Flocculation Process of PEO for Lignin Removal from Pre-Hydrolysis Liquor of Mixed Hardwood
Advanced Materials Research, 2013To isolate lignin of PHL, PEO with various molecular weights (MW) s were added to PHL under different process conditions, and the turbidity and size of complexes formed in the PHL, as well as the lignin, hemicelluloses (sugar) and chemical oxygen demand (COD) of PHL were assessed after PEO treatments. Alternatively, poly aluminum chloride (PAC) (200 mg/
Gang Liu +5 more
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Water Quality Research Journal, 2013
Anaerobic degradation showed potential as the disposal solution for pre-hydrolysis liquor (PHL) from the dissolving pulp industries. This PHL contained pentose and hexose carbohydrates as monomeric (14.5 g/L) and oligomeric (39.7 g/L) forms along with acetic acid (10.38 g/L), furfural (1.14 g/L) and lignin (11.08 g/L).
Kripa S. Singh +2 more
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Anaerobic degradation showed potential as the disposal solution for pre-hydrolysis liquor (PHL) from the dissolving pulp industries. This PHL contained pentose and hexose carbohydrates as monomeric (14.5 g/L) and oligomeric (39.7 g/L) forms along with acetic acid (10.38 g/L), furfural (1.14 g/L) and lignin (11.08 g/L).
Kripa S. Singh +2 more
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Enzyme and Microbial Technology, 2017
Herein, we described for the first time, biosynthesis of silver nanoparticles (AgNPs) using pre-hydrolyzed liquor of Eucalyptus wood under ambient conditions. The pre-hydrolyzed liquor containing a high amount of metabolites such as polyphenols, hemicelluloses and its derivatives are mainly assisted for the reduction and stabilization process of Ag ...
M, Shivakumar +5 more
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Herein, we described for the first time, biosynthesis of silver nanoparticles (AgNPs) using pre-hydrolyzed liquor of Eucalyptus wood under ambient conditions. The pre-hydrolyzed liquor containing a high amount of metabolites such as polyphenols, hemicelluloses and its derivatives are mainly assisted for the reduction and stabilization process of Ag ...
M, Shivakumar +5 more
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Bioresource Technology, 2013
This study aimed to produce furfural from the PHL. Results showed best furfural yield of 32.8% and the furfural selectivity of 37.7% in the monophase system (170 °C, 100 min), while they were 60.1% and 69.8%, respectively in the biphase system. The lower furfural selectivity in the monophase system was explained by more side reactions, such as ...
Haitang, Liu +3 more
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This study aimed to produce furfural from the PHL. Results showed best furfural yield of 32.8% and the furfural selectivity of 37.7% in the monophase system (170 °C, 100 min), while they were 60.1% and 69.8%, respectively in the biphase system. The lower furfural selectivity in the monophase system was explained by more side reactions, such as ...
Haitang, Liu +3 more
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Industrial Crops and Products, 2021
Abstract Reasonable utilization of lignin in pre-hydrolysis liquor (PHL) is very important for the economic benefit of papermaking industry. In this paper, lignin in poplar pre-hydrolysis liquor (PHL) was effectively adsorbed by TiO2 nanosheets, realizing the purification of PHL.
Qichao Gao +7 more
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Abstract Reasonable utilization of lignin in pre-hydrolysis liquor (PHL) is very important for the economic benefit of papermaking industry. In this paper, lignin in poplar pre-hydrolysis liquor (PHL) was effectively adsorbed by TiO2 nanosheets, realizing the purification of PHL.
Qichao Gao +7 more
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Bioresource Technology, 2017
Herein, bacterial cellulose (BC) was synthesized by acetobacter xylinum via organic acid pre-hydrolysis liquor of agricultural corn stalk used as carbon source. Acetic acid was applied to pretreat the corn stalk, then, the prehydrolysate was detoxified by sequential steps of activated carbon and ion exchange resin treatment prior to use as carbon ...
Rendang Yang
exaly +3 more sources
Herein, bacterial cellulose (BC) was synthesized by acetobacter xylinum via organic acid pre-hydrolysis liquor of agricultural corn stalk used as carbon source. Acetic acid was applied to pretreat the corn stalk, then, the prehydrolysate was detoxified by sequential steps of activated carbon and ion exchange resin treatment prior to use as carbon ...
Rendang Yang
exaly +3 more sources
Chitosan as a flocculant for pre-hydrolysis liquor of kraft-based dissolving pulp production process
Carbohydrate Polymers, 2011Abstract In this work, the flocculation concept was employed to recover the dissolved lignocellulosic materials of industrially produced pre-hydrolysis liquor (PHL) using two different molecular weights of chitosan. The analysis revealed the maximum turbidity of 1000 NTU or 1900 NTU via adding 2.2 mg/g low molecular weight (LMW) or 1.7 mg/g high ...
Abrar Saeed, Pedram Fatehi, Yonghao Ni
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Biomass and Bioenergy, 2011
Abstract Hemicelluloses are the main organics dissolved in the pre-hydrolysis liquor (PHL) of the kraft-based dissolving pulp production process. In this study, two methods were employed to isolate the hemicelluloses from industrial PHL samples. The results showed that the hemicelluloses, precipitated in ethanol after an acidification step (Method 2),
Zehua Liu +3 more
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Abstract Hemicelluloses are the main organics dissolved in the pre-hydrolysis liquor (PHL) of the kraft-based dissolving pulp production process. In this study, two methods were employed to isolate the hemicelluloses from industrial PHL samples. The results showed that the hemicelluloses, precipitated in ethanol after an acidification step (Method 2),
Zehua Liu +3 more
openaire +1 more source