Results 181 to 190 of about 2,639 (209)

COMPARATIVE STUDY OF PREHYDROLYSIS METHODS FOR VEGETAL MATERIALS

Environmental Engineering and Management Journal, 2015
This paper presents the results obtained using the prehydrolysis treatments of rapeseed stalks depending on regime and the catalyst. The vegetal materials were subjected under different temperature conditions and then characterized for the yield reducing substances.
Teodor Malutan, Corina Malutan, Adina Elena Panzariu   +2 more
openaire   +1 more source

SO2 prehydrolysis for high yield ethanol production from biomass

Applied Biochemistry and Biotechnology, 1988
The advantages of the use of SO2 in steam pretreatment are described. Two different large scale continuous reactors, the Stake and the Wenger, have been used for this purpose. Pine, aspen and corn stover were prehydrolysed by SO2 in these reactors and hydrolysed by enzymes.
Morris Wayman, Sarad R. Parekh
openaire   +1 more source

Superparamagnetic Iron Oxide Nanoparticles as Additives for Microwave-Based Sludge Prehydrolysis: A Perspective

Environmental Science & Technology, 2023
Wastewater treatment plants are critical for environmental pollution control. The role that they play in protecting the environment and public health is unquestionable; however, they produce massive quantities of excess sludge as a byproduct. One pragmatic approach to utilizing excess sludge is generating methane via anaerobic digestion.
Dilara Hatinoglu, Junseok Lee, John Fortner, Onur Apul   +3 more
openaire   +2 more sources

SO2-catalysed prehydrolysis of coniferous wood for ethanol production

Biotechnology Letters, 1986
This paper reports studies of large scale, 1500 kg/h, SO2-catalysed prehydrolysis of coniferous wood chips, samples then being hydrolyzed by a wood-saccharifying enzyme system followed by fermentation to ethanol in the laboratory. Hemicellulose hydrolysis using SO2 catalyst (prehydrolysis) was found to be more effective than steam alone (autohydrolysis)
Morris Wayman, Sarad Parekh, Esteban Chornet, Ralph P. Overend   +3 more
openaire   +1 more source

Prehydrolysis of hardwoods with dilute sulfuric acid

Industrial & Engineering Chemistry Product Research and Development, 1985
On etudie les effets de la temperature, de la duree, de la concentration en acide, de l'espece de bois, du rapport liqueur-bois, de la taille des particules et du sechage sur l'hydrolyse de l'hemicellulose et le rendement en oses lors de la prehydrolyse des bois ...
openaire   +1 more source

Characteristics of prehydrolysis-kraft pulp fibers from Scots pine

Holzforschung, 2012
Abstract To clarify the influence of prehydrolysis on fiber characteristics, Scots pine (Pinus sylvestris L.) wood chips were subjected to pressurized hot-water and dilute-acid prehydrolysis (0.5% H2SO4) prior to kraft pulping to partially remove hemicelluloses as hydrolyzate.
Esa Saukkonen, Jesse Kautto, Irina Rauvanto, Kaj Backfolk   +3 more
openaire   +1 more source

Dissolving-grade birch pulps produced under various prehydrolysis intensities: quality, structure and applications

Cellulose, 2014
Aqueous-phase prehydrolysis followed by alkaline pulping is a viable process to produce wood-based dissolving pulps. However, detailed characterisation of the achievable pulp quality, performance and cellulose structure is yet lacking. In this study, the production of hemicellulose-lean birch soda-anthraquinone pulps after prehydrolysis under various ...
Testova, Lidia, Borrega, Marc, Tolonen, Lasse K., Penttilä, Paavo A., Serimaa, Ritva, Larsson, Per Tomas, Sixta, Herbert   +6 more
openaire   +2 more sources

Cellulose from Softwood via Prehydrolysis and Soda/Anthraquinone Pulping

Journal of Wood Chemistry and Technology, 1997
Abstract A two stage process based on a hydrolytic pretreatment and a soda/anthraquinone pulping stage has been studied to produce bleachable-grade cellulose from residual softwood sawdust, concretely a mixture of ground spruce (Abies alba) and pine (Pinus insignis).
Jordi Reguant, José M. Martínez, Daniel Montané, Joan Salvadó, Xavier Farriol   +4 more
openaire   +1 more source

Study on the fluorescence properties of lignocellulosic prehydrolysis liquor

Wood Science and Technology, 2019
The fluorescence properties were first probed for wood prehydrolysis liquor (PHL) in the present study. Besides fluorescence concentration quenching and pH effects, the excitation wavelength-dependent photoluminescence properties were also observed at excitation from 360 to 430 nm.
Honglei Chen, Xin Zhao, Shunli Li, Xingxiang Ji, Yu Liu, Fangong Kong   +5 more
openaire   +1 more source

Prehydrolysis in Softwood Pulping Produces a Valuable Biorefinery Fraction for Material Utilization

Environmental Science & Technology, 2012
A scaled-up prehydrolysis process was elaborated to demonstrate an industrially feasible operation step in a pulping process that generates a valuable side product in addition to the cellulose pulp. The valuable side product is aqueous process liquor, a softwood hydrolysate (SWH) herein produced in 60 L batches, and its components were recovered and ...
Soheil, Saadatmand, Ulrica, Edlund, Ann-Christine, Albertsson, Sverker, Danielsson, Olof, Dahlman   +4 more
openaire   +2 more sources