Evaluation of mixtures of pine and eucalypt wood for the production of bleached kraft pulp
Source abstract
Abstract
Abstract Blending wood species can combine complementary fiber attributes in a single pulp. This study evaluated kraft pulping of Pinus sp . and Eucalyptus sp. chip mixtures and the bleachability of the resulting pulp. Pulping was performed to reach Kappa 20 ± 1 using eucalypt/pine blends at 90/10, 80/20, 70/30, and 60/40 (oven-dry mass). A 100 % eucalyptus pulp served as the Reference. All pulps were bleached with an ECF sequence. As pine proportion increased, the H-factor rose from 481 (Reference) to 1,170 at 40 % pine. Brown pulp viscosity showed a decreasing trend with increasing long fiber content. Bleaching reacted in such a way that pulps with higher long fiber content and lower bleachability required higher active chlorine loads. Overall, kraft pulping of these mixtures proved technically feasible. However, these operational trade-offs should be weighed against potential property gains from longer fibers, so that chip-mix strategies can be tuned to balance product performance with pulping and bleaching.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Lignin and Wood Chemistry · Advanced Cellulose Research Studies · Wood Treatment and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
President Antonio Carlos Foundation , Ponte Nova , Minas Gerais , 35430-225 , Brazil
Federal Rural University of Rio de Janeiro , Seropédica , Rio de Janeiro , 23890-000 , Brazil
Federal University of Viçosa , Viçosa , Minas Gerais , 36570-900 , Brazil
State University of Mato Grosso do Sul , Aquidauana , Mato Grosso do Sul , 79200-000 , Brazil
Federal University of Espírito Santo , Jerônimo Monteiro , Espírito Santo, 29550-000 , Brazil
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