Results 71 to 80 of about 91,381 (225)
Ultrafast Spectroelectrochemistry of the Catechol/o‐Quinone Redox Couple in Aqueous Buffer Solution
ChemPhotoChem, Volume 8, Issue 9, September 2024.The transient absorption spectroelectrochemistry of the catechol/o‐quinone redox couple was studied in aqueous buffer solution. This method offers an accessible approach to electrochemically generate and analyse unstable redox species, here o‐quinone.
Sofia Goia +9 more
wiley +1 more source
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
doaj +2 more sources
Conversion of WastePaper into Dissolving Pulp: A Path for Circular Bioeconomy
ChemistrySelect, Volume 9, Issue 30, August 12, 2024.The potential of wastepaper to produce dissolving pulp was demonstrated in this article. By employing and optimizing chemical processes to wastepaper pulp, a noteworthy increase of 84 % in pulp Fock reactivity was achieved (from 45.6 % to 84.1 %). The pulp characteristics were followed throughout the different treatments allowing better understanding ...
Thalita P. Damaceno +3 more
wiley +1 more source
BioResources, 2010 Investigation of last stage bleaching with peracetic acid is the main subject of this paper. Proper conditions were established to apply peracetic acid as the last bleaching stage of the D(Ep)D/Paa, DHT(Ep)D/Paa, A/D(Ep)D/Paa, DHT/Q(PO)Paa and Z/ED/Paa ...
Denise P. Barros +3 more
doaj
ECF Bleaching of Softwood and Eucalyptus Pulps- a Comparative Study
JAPAN TAPPI JOURNAL, 2003 This paper deals with a comparison in ECF bleaching and effluent characterisation of kraft pulps based on softwood and eucalyptus. The study is made for both conventional and oxygen delignified pulps.There are similarities in the bleaching of softwood and eucalyptus looking at the bleaching parameters.
Mealier, Lennart +3 more
openaire +2 more sources
Sub‐Band Assisted Z‐Scheme for Effective Non‐Sacrificial H2O2 Photosynthesis
Small, Volume 20, Issue 35, August 28, 2024.High‐value‐added H2O2 photosynthesis via synergistic O2 reduction and H2O oxidation is an eco‐friendly approach for sustainable solar‐to‐chemical conversion. Through in‐depth transient spectroscopic investigations, the remarkable performance of a significant sub‐band and Z‐Scheme co‐operative H2O2 photosynthesis without the need for sacrificial agents ...
Wenchao Wang +7 more
wiley +1 more source
Operating Experience of ECF Bleaching with Xylanase Treatment
JAPAN TAPPI JOURNAL, 2003 Yonago mill of Oji Paper produces approximately 1, 200 tons of hardwood pulps per day at 85-86% ISO brightness for coated paper products.Xylanase treatment with on-site enzyme production was introduced into the hardwood kraft pulp bleaching process (C-E/O-dnD) in October 1998. A thermostable xylanase from a microorganism. Bacillus sp.
openaire +2 more sources
Advanced Science, Volume 11, Issue 24, June 26, 2024.Cellulose fibers of various length scales are used to ink‐write complex‐shaped aerogels directly. High‐fidelity shapes are achieved, while anisotropic mechanical and thermal properties result from cellulose nanofiber (CNF) and cellulose nanocrystal (CNC) alignment.
Deeptanshu Sivaraman +17 more
wiley +1 more source
, 2004 The link between kraft cooking and bleaching was investigated, with the focus on how cooking kappa number, cooking conditions and pre-bleaching stages influence ECF bleachability and environmental parameters in the bleaching effluent.
Björklund, Magnus
core
, 2021 The aim of this work is to contribute to the process development of the ECF light bleaching sequence Q(OP)D(PO) by providing a better understanding of the bleaching of softwood kraft pulp.
Starrsjö, Sara, +5 more
core