Change search
ReferencesLink to record
Permanent link

Direct link
Chemical characteristics of NovaCell pulp as compared to conventional kraft pulp with emphasis on the carbohydrate fraction
2003 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The chemical characteristics of NovaCell pulp as compared to conventional kraft pulp have been investigated with emphasis on the carbohydrate composition in order to study whether the differences between the two pulps can be explained by differnces in the carbohydrate polymers. The pulps examined were produced at the STFI (Swedish Pulp and Paper Research Insitute) cokking laboratory. All the pulps were produced softwood (100% spruce). The carbohydrate composition of the pulps and in the surface layers of the pulp fibres were determined by utilizing enzymatic total hydrolysis and enzymatic peeling, respectively, followed by analysis with capillary zone electrophoresis (CZE). The amount of carboxylic groups in the pulps was determined by conductometric titration. Finally, the molar mass ditribution (MMD) of the pulps were investigated by utilizing size-exclusion chromatography (SEC). The carbohydrate analysis showed that the carbohydrate composition of the bulk fibre differs between NovaCell and kraft pulps. The relative amount of glucomannan is larger in NovaCell pulp than that of kraft pulp, whereas the relative amount xylan is smaller in Novacell pulp as compared to kraft pulp. The conductometric titration showed that NovaCell pulp contains larger amount of carboxylic acid groups as compared to kraft pulp. Finally, the SEC analysis showed that cellulose is more degraded in the NovaCell pulp than in kraft pulp.

Place, publisher, year, edition, pages
2003.
Keyword [en]
Technology, Pulp, kraft, soda-AQ, NovaCell
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-45432ISRN: LTU-EX--03/225--SELocal ID: 31f50fa8-2355-408d-9ed2-e31e6d74abf2OAI: oai:DiVA.org:ltu-45432DiVA: diva2:1018723
Subject / course
Student thesis, at least 30 credits
Educational program
Chemical Engineering, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

Open Access in DiVA

No full text

Search outside of DiVA

GoogleGoogle Scholar

Total: 4 hits
ReferencesLink to record
Permanent link

Direct link