Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Gustavo Ventorim"'
Publikováno v:
Ciência Florestal, Vol 28, Iss 3, Pp 1192-1201 (2018)
The bleached pulp market has been working to provide brightness levels at values of 92% ISO respecting, however, environmental standards and seeking for less aggressive processes. Then, the additional chlorine dioxide that would be necessary to lift
Externí odkaz:
https://doaj.org/article/39f19bfe79544764a53048b1aeba52f6
Publikováno v:
Holos, Vol 1, Iss 0, Pp 327-339 (2016)
A utilização dos pellets de madeira para a geração de energia térmica está se difundindo no Brasil e a termogravimetria tem sido amplamente aplicada para o estudo da decomposição da madeira e seus principais componentes como a celulose, hemic
Externí odkaz:
https://doaj.org/article/085f2136f884404e9a7c782ddebc227c
Autor:
Rafael dos Santos, Julio Antonio de Mello Júnior, José Cláudio Caraschi, Gustavo Ventorim, Felipo Augusto Pereira
Publikováno v:
Ciência Florestal, Vol 26, Iss 4, Pp 1281-1290 (2016)
The wood of the gender Eucalyptus occupies a prominence place among other cellulose sources due to its chemical composition, its low cost, abundance and availability. Among the chemical pulping processes, kraft process is the most extensively one use
Externí odkaz:
https://doaj.org/article/8ea2b8603743489ab0eca85c99225f7a
Autor:
Ivan Rodrigues dos Santos, Gustavo Ventorim, José Cláudio Caraschi, Jaqueline Silveira Comelato Favaro
Publikováno v:
Revista Árvore, Vol 39, Iss 6, Pp 1147-1154 (2015)
O objetivo deste estudo foi verificar a influência do emprego de sequências de branqueamento na retenção de diferentes teores de caulim e nas propriedades do papel formado. Foram adotadas três sequências de branqueamento do tipo ECF para uma me
Externí odkaz:
https://doaj.org/article/74a380e69145422e9127c4ecdeb30ad0
Publikováno v:
Revista Árvore, Vol 42, Iss 5 (2018)
ABSTRACT The kraft pulp of Eucalyptus spp. is relatively easy to be bleached. Therefore, studies have been carried out to reduce the number of stages of bleaching in the plant and minimize process costs. The present work aimed to evaluate the use of
Externí odkaz:
https://doaj.org/article/bec281c4833e411ba9a97af0b1025e50
Autor:
Gustavo Ventorim, Alexandre Coelho, Jorge Luiz Colodette, Ericka Figueiredo Alves, Jaqueline Silveira Comelato
Publikováno v:
Ciência Florestal, Vol 24, Iss 1, Pp 205-210 (2014)
http://dx.doi.org/10.5902/1980509813337This study aimed to evaluate the sensitiveness of the information obtained for the residual lignin from Eucalyptus grandis kraft pulps analyzed through the nitrobenzene oxidation, copper oxide (CuO) reduction an
Externí odkaz:
https://doaj.org/article/705c8dd7d33048afb51d6ae109a716fb
Autor:
Gustavo Ventorim, Alexandre Coelho, Jorge Luiz Colodette, Ericka Figueiredo Alves, Jaqueline Silveira Comelato
Publikováno v:
Ciência Florestal, Vol 24, Iss 1, Pp 205-210 (2014)
This study aimed to evaluate the sensitiveness of the information obtained for the residual lignin from Eucalyptus grandis kraft pulps analyzed through the nitrobenzene oxidation, copper oxide (CuO) reduction and acidolysis techniques. The chips were
Externí odkaz:
https://doaj.org/article/32c1f4eefc7246328dfde3c48c1e93f2
Autor:
Jaqueline Silveira Comelato, Gustavo Ventorim, José Cláudio Caraschi, Ivan Rodrigues dos Santos
Publikováno v:
Revista Árvore, Vol 37, Iss 1, Pp 181-189 (2013)
Este trabalho teve por objetivo avaliar a quantidade de finos gerada por diferentes reagentes de branqueamento e seu efeito nas propriedades físicas e mecânicas da celulose kraft de eucalipto. A polpa foi branqueada por quatro sequências diferente
Externí odkaz:
https://doaj.org/article/711d4bbea77f42f8bb7f60f51ddf233a
Autor:
Gustavo Ventorim, Jorge L. Colodette
Publikováno v:
Ciência Florestal, Vol 15, Iss 1, Pp 93-103 (2010)
In this study, Total Chlorine Free (TCF) bleaching processes were evaluated for bleaching a secondary fiber of different origens. The samples were bleached to a target brightness of 78 % ISO. The results were interpreted on the basis of chemical cost
Externí odkaz:
https://doaj.org/article/add13a61b14e478c81ef9c59861d1bf2
Publikováno v:
Ciência Florestal, Vol 9, Iss 2, Pp 41-54 (2009)
In this study, ECF and TCF bleaching processes were evaluated for the bleaching of a deinked mixed office waste (MOW) pulp sample produced in a pilot plant. The sample was bleached by all processes to a target brightness of 78 % ISO minimum. The resu
Externí odkaz:
https://doaj.org/article/433f43e0458d410e986af5bbba3efe89