Results 141 to 150 of about 1,591 (176)

A comparative study of the impact of the cooking process on oxygen delignification

Nordic Pulp & Paper Research Journal, 1997
The impact of oxygen delignification on chemical pulps of a given kappa number manufactured in different ways (using kraft, prehydrolysis kraft and magnesium sulphite cooking) has been investigated. The prehistory of the pulps proves to be a very important factor in determining the response to oxygen delignification, i.e. the degree of delignification.
Stefan Antonsson, Mikael E. Lindstrom, Martin Ragnar   +2 more
openaire   +1 more source

Nitrogen-Centered Activators of Peroxide-Reinforced Oxygen Delignification

Industrial & Engineering Chemistry Research, 2004
In an effort to augment the efficiency of an oxygen delignification stage, we examined the effectiveness of various heterocyclic aromatic nitrogen compounds as possible activators of such a stage. It was shown that a variety of such compounds may act as activators in the presence of hydrogen peroxide, improving the delignification efficiency of oxygen ...
Dimitris S. Argyropoulos, Miro Suchy, Leonid Akim   +2 more
openaire   +1 more source

Oxygen-alkali delignification of mechanically pretreated wood

2001
Kubes, George (Supervisor)
openaire   +1 more source

Modelling oxygen delignification in pulp processing operations

2009
A mathematical model of oxygen delignification for pulp processing operations has been developed to predict the kappa number (lignin content) and pulp strength (CED viscosity) as a function of system operation variables. The model incorporates a set of appropriate chemical reaction kinetics chosen from those available in the literature and gas-liquid ...
openaire   +1 more source

Mass transfer and kinetics in oxygen delignification

2020
ABSTRACT MASS TRANSFER AND KINETICS IN OXYGEN DELIGNIFICATION Doğan, Ismail Ph.D., Department of Chemical Engineering Supervisor : Prof. Dr. Hayrettin Yücel Co-Supervisor : Prof. Dr. Güniz Gürüz November 2004, 147 pages In this study, the kinetic analysis of oxygen delignification of Turkish southern hardwood Kraft pulp was carried out.
openaire   +1 more source

Oxygen delignification as a pretreatment for the enzymatic hydrolysis of lignocellulosic material

2009
With the increasing importance of environmental conservation and the inevitable depletion of the world's fossil fuel supplies, it is necessary to develop renewable and clean sources of energy. Bioconversion, the process of converting plant biomass to fuel grade ethanol, is one process that addresses these concerns.
openaire   +1 more source

A new look at the kinetics of oxygen delignification of softwood kraft pulp

Holzforschung, 2023
Adriaan Van Heiningen
exaly  

NiFe Nanoparticle Encapsulated into Wood Carbon for Efficient Oxygen Evolution: Effect of Wood Delignification

ACS Sustainable Chemistry and Engineering, 2022
Yan Qing, Yiqiang Wu, Cuihua Tian
exaly  

CATALYSIS OF OXYGEN-ACETONE DELIGNIFICATION

2000
Ivan Deineko, Inna Deineko
openaire   +1 more source

Oxygen Delignification Chemistry and Its Impact on Pulp Fibers

Journal of Wood Chemistry and Technology, 2003
Arthur Ragauskas, Hasan Jameel, Lucian Lucia   +2 more
exaly