Results 91 to 100 of about 2,238 (210)
Sodium perborate usage instead of hydrogen peroxide for the reinforcement of oxygen delignification [PDF]
, 2010 Oxygen has always been an attractive oxidant for the pulp and paper industry due to it being cheap and harmless for the environment. However, it has lower lignin-cellulose selectivity, therefore the degree of delignification achieved at the oxygen stage ...
Peşman, Emrah +2 more
core
Xylan deposition onto eucalypt pulp fibers during oxygen delignification
, 2011 A novel alternative was investigated for elevating the xylan content of eucalyptus pulp through xylan deposition in the course of the oxygen delignification stage.
Marcelo Coelho dos Santos Muguet +2 more
core +1 more source
Efficient H2O2-system for fiber delignification-bleaching and its environmental impact
Discover MaterialsHydrogen peroxide (H2O2) is considered an eco-friendly oxidizing agent because it can decompose into water and oxygen in water. H2O2 has been implemented in the lignocellulosic delignification-bleaching through lignin degradation or dye by reactive ...
Afrinal Firmanda +9 more
doaj +1 more source
Gas-liquid Mass Transfer in Oxygen Delignification Systems
, 2004 Oxygen delignification involves a three phase reaction system; pulp fibers, and aqueous phase containing caustic and an oxygen gas phase. In this system, oxygen dissolves into the aqueous phase and is then transported through the liquid to the pulp ...
Krothapalli, Deep
core
Pulp Pretreatments for Improved Selectivity and Extended Oxygen Delignification
, 2002 Oxygen delignification has developed steadily since it was introduced commercially in 1970 in South Africa and virtually all new fiber lines incorporate an oxygen delignification system following the digester prior to the bleach plant.
Dang, Zheng
core
Transition metal-catalysed oxidation of lignin model compounds for oxygen delignification of pulp [PDF]
, 2006 Molecular oxygen (O2) is widely used as a delignification agent in pulp bleaching. Unfortunately, carbohydrates are attached to a greater extent during oxygen delignification than during treatment with chlorine-containing chemicals, and the ...
Sippola, Väinö
core
Reflections around the kinetics of medium consistency oxygen delignification
, 2003 Työn tavoitteena oli tarkastella keskisakeudessa toimivan happidelignifioinnin kinetiikkaa ja vertailla sitä olemassa olevien kineettisten tutkimuksien kanssa.
Nikkinen, Erna
core
Modelling oxygen delignification in pulp processing operations
, 2005 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
Susilo, Jacky
core
BioResourcesMolded fiber-based packaging has recently surged in popularity as a replacement for single-use plastics (SUPs). However, key challenges include the lack of low-cost, high-yield sustainable fibers that provide adequate strength and moldability while ...
Roman Sarder +6 more
doaj
ON THE RECOVERY OF HEMICELLULOSE BEFORE KRAFT PULPING
BioResources, 2012 To assess the feasibility of implementing hemicellulose recovery stages in kraft mills, Eucalyptus globulus wood samples were subjected to aqueous treatments with hot, compressed water (autohydrolysis processing) to achieve partial dissolution of xylan ...
Carlos Vila, +4 more
doaj