BICARBONATE ANION AND TAED AS ACTIVATORS IN PEROXIDE BLEACHING OF A MECHANICAL PULP

Simple item page
dc.contributor.authorFRANCIS, RAYMOND C.
dc.contributor.authorLUUKKONEN, ANTTI
dc.contributor.authorATTIOGBE, FRANCIS K.
dc.date.accessioned2023-09-21T00:11:05Z
dc.date.available2023-09-21T00:11:05Z
dc.date.issued2019-09
dc.description.abstractEarlier research demonstrated that the bicarbonate anion (HCO3 āˆ’ ) activated hydrogen peroxide and made it into an effective bleaching agent for both chemical and mechanical pulps at pH ~ 8.5. The peroxide/bicarbonate treatment is designated as a PB stage. It was also observed that in PB bleaching of chemithermomechanical pulps (CTMPs), a higher initial pH resulted in more H2O2 being consumed and the achievement of a higher bleached brightness. This research focused on using Na2CO3 instead of NaHCO3 to achieve a higher pH in PB bleaching of softwood CTMP. Further activation of the H2O2 was obtained by the addition of N, N, Nā€™, Nā€™-tetraacetylethylenediamine (TAED). There was a high peroxide residual when 3.0% H2O2 on pulp (oven-dried or OD basis) was used in a conventional alkaline peroxide (P) stage. Sodium carbonate was added to the P stage effluent (with or without TAED), which was recycled and used to pretreat unbleached pulp. A significant increase in brightness (~3 points) was obtained when the pretreated pulp was regularly bleached with 3.0% H2O2 on pulp in a P stageen_US
dc.description.sponsorshipACE: Energy and Environmental Sustainabilityen_US
dc.identifier.issn0576-9787
dc.identifier.issn2457-9459
dc.identifier.urihttp://hdl.handle.net/123456789/2163
dc.language.isoenen_US
dc.publisherCELLULOSE CHEMISTRY AND TECHNOLOGYen_US
dc.relation.ispartofseriesCELLULOSE CHEMISTRY AND TECHNOLOGY;;54 (3-4)
dc.subjectperoxide bleaching, mechanical pulpen_US
dc.subjecthydrogen peroxideen_US
dc.subjectperoxymonocarbonate anionen_US
dc.subjectACE: Energy and Environmental Sustainabilityen_US
dc.subjectUniversity of Energy & Natural Resourcesen_US
dc.subjectGhanaen_US
dc.subjectpoweren_US
dc.titleBICARBONATE ANION AND TAED AS ACTIVATORS IN PEROXIDE BLEACHING OF A MECHANICAL PULPen_US
dc.typeArticleen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
BICARBONATE.pdf
Size:
186.86 KB
Format:
Adobe Portable Document Format
Description:
Main article
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
STEM