Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Minskning i variation av kontrollvariabler genom utvärdering av skillnader i pappers- och massa egenskaper för två arter av tall
2012 (engelsk)Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
Abstract [en]

The objective of this thesis work was to investigate if there is a difference regarding pulping and paper properties of two pine species (Pinus tecunumanii and Pinus patula) investigated at two different Kappa numbers. This was carried out by first producing a pulping curve relating Kappa number to the amount of charged chemicals. This curve was then used to calculate the necessary amount of chemicals to reach the desired Kappa numbers in the labscale digesters. The pulping properties were analysed by measuring pH, residual alkali and solids percentage of the black liquor and the Kappa number and yield of the pulp. The pulps were then refined and formed into handsheets which were evaluated regarding bulk, burst -, tear- and tensile strength, TEA (tensile energy absorption), elongation and porosity.The results indicate that P. tecunumanii, compared to P. patula, demands longer time in the digester or a higher charge of chemicals to obtain the same Kappa number. The results also indicate that the pulp yield is higher for P. patula. Regarding the paper properties no significant difference could be seen at the lower Kappa number but at the higher Kappa number the species Pinus tecunumanii show higher strength.

sted, utgiver, år, opplag, sider
2012. , s. 42
Emneord [en]
Physics Chemistry Maths
Emneord [sv]
Fysik, Kemi, Matematik
Identifikatorer
URN: urn:nbn:se:ltu:diva-51630Lokal ID: 8d51f5fe-b62b-4c27-8411-cfca673878b2OAI: oai:DiVA.org:ltu-51630DiVA, id: diva2:1024993
Fag / kurs
Student thesis, at least 30 credits
Utdanningsprogram
Chemical Engineering, master's level
Examiner
Merknad
Validerat; 20120608 (anonymous)Tilgjengelig fra: 2016-10-04 Laget: 2016-10-04bibliografisk kontrollert

Open Access i DiVA

fulltekst(2997 kB)204 nedlastinger
Filinformasjon
Fil FULLTEXT02.pdfFilstørrelse 2997 kBChecksum SHA-512
b17f1f770389db86645dcaeedf84f4b4abf60f0164048fb64bc490faca59d28f61bf4abbd6ea82304b2be53ff600d1e0d88f7a7dc72a799c8c8140c55bd06b98
Type fulltextMimetype application/pdf

Søk i DiVA

Av forfatter/redaktør
Gustafsson, Cristina

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 204 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

urn-nbn

Altmetric

urn-nbn
Totalt: 48 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf