Wood quality of Pinus taeda and Pinus sylvestris for kraft pulp production

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Vivian MA, Segura TES, Bonfatti EA, Sarto C, Schmidt F, da Silva FG, Gabov K, Fardim P
Förläggare: IPEF-INST PESQUISAS ESTUDOS FLORESTAIS
Publiceringsår: 2015
Tidskrift: Scientia Forestalis
Tidskriftsakronym: SCI FOR
Volym: 43
Nummer: 105
Artikelns första sida, sidnummer: 183
Artikelns sista sida, sidnummer: 191
Antal sidor: 9
ISSN: 1413-9324
eISSN: 2318-1222


Abstrakt

The objective of this work was to evaluate the technological characteristics of the woods of Pinus taeda and Pinus sylvesttis to Kraft pulp production. Industrial chips of both species were used: Pinus taeda from Brazil and Pinus sylvestris from Finland. On wood technological characteristics analysis, basic density, chemical composition and tracheid's morphology were determined. On pulping, seven levels of active alkali were applied between 14 and 26% (NaOH based), with 90 minutes of heating time and 120 minutes at maximum temperature of 170 degrees C. It was possible to observe that both analyzed woods present similar basic density and lignin portions (0,435 e 0,436 g.cm(-3), 26,71 and 25,61% for P taeda and P sylvestris, respectively), while the wood of P. taeda presents lower extractives portion (2,83%), higher holocellulose content (70,46%) and tracheids with higher length (3,50mm), when compared to P sylvestris wood. On pulping, the wood of P taeda had higher yields, higher delignification level and lower wood specific consumption. From this we conclude that the P taeda wood has better characteristics for pulp and paper production when compared to P sylvestris.


Nyckelord

alkaline curve, kraft pulp, softwood

Senast uppdaterad 2019-23-10 vid 04:32