Adsorption of sodium on O2-prebleached Eucalyptus globulus kraft pulp

Gonzalo Vázquez; Mónica López; Julia González; Gervasio Antorrena

Adsorption of sodium on O₂-prebleached Eucalyptus globulus kraft pulp

Gonzalo Vázquez
, Mónica López
, Julia González
, Gervasio Antorrena

Research output: Contribution to journal › Article › Academic › peer-review

2 Citations (Scopus)

3 Downloads (Pure)

Abstract

We have studied the influence of pH and sodium concentration in liquor on sodium adsorption by Eucalyptus globulus kraft pulp. The adsorption is negligible at pH<3 and increases with increasing pH to reach a limit value of the amount of sodium adsorbed at pH 7-8. Under such conditions, the carboxyl groups present in the lignin and the polysaccharide fractions of the pulp dissociated completely. We adjusted the equilibrium data satisfactorily to the Langmuir model, and obtained the values Q=8.26 kg sodium sulfate (Na 2SO4)/o.d, ton pulp and k=62.8 L/g Na2SO 4 for the isothermal parameters. These parameters, incorporated into the WinGEMS simulator, will allow us to obtain the sodium balance and to simulate the totally chlorine free (TCF) kraft pulp process.

Original language	English
Pages (from-to)	21-23
Number of pages	3
Journal	Tappi journal
Volume	1
Issue number	1
Publication status	Published - 2002
Externally published	Yes

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title = "Adsorption of sodium on O2-prebleached Eucalyptus globulus kraft pulp",

abstract = "We have studied the influence of pH and sodium concentration in liquor on sodium adsorption by Eucalyptus globulus kraft pulp. The adsorption is negligible at pH<3 and increases with increasing pH to reach a limit value of the amount of sodium adsorbed at pH 7-8. Under such conditions, the carboxyl groups present in the lignin and the polysaccharide fractions of the pulp dissociated completely. We adjusted the equilibrium data satisfactorily to the Langmuir model, and obtained the values Q=8.26 kg sodium sulfate (Na 2SO4)/o.d, ton pulp and k=62.8 L/g Na2SO 4 for the isothermal parameters. These parameters, incorporated into the WinGEMS simulator, will allow us to obtain the sodium balance and to simulate the totally chlorine free (TCF) kraft pulp process.",

author = "Gonzalo V{\'a}zquez and M{\'o}nica L{\'o}pez and Julia Gonz{\'a}lez and Gervasio Antorrena",

year = "2002",

language = "English",

volume = "1",

pages = "21--23",

journal = "Tappi journal",

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T1 - Adsorption of sodium on O2-prebleached Eucalyptus globulus kraft pulp

AU - Vázquez, Gonzalo

AU - López, Mónica

AU - González, Julia

AU - Antorrena, Gervasio

PY - 2002

Y1 - 2002

N2 - We have studied the influence of pH and sodium concentration in liquor on sodium adsorption by Eucalyptus globulus kraft pulp. The adsorption is negligible at pH<3 and increases with increasing pH to reach a limit value of the amount of sodium adsorbed at pH 7-8. Under such conditions, the carboxyl groups present in the lignin and the polysaccharide fractions of the pulp dissociated completely. We adjusted the equilibrium data satisfactorily to the Langmuir model, and obtained the values Q=8.26 kg sodium sulfate (Na 2SO4)/o.d, ton pulp and k=62.8 L/g Na2SO 4 for the isothermal parameters. These parameters, incorporated into the WinGEMS simulator, will allow us to obtain the sodium balance and to simulate the totally chlorine free (TCF) kraft pulp process.

AB - We have studied the influence of pH and sodium concentration in liquor on sodium adsorption by Eucalyptus globulus kraft pulp. The adsorption is negligible at pH<3 and increases with increasing pH to reach a limit value of the amount of sodium adsorbed at pH 7-8. Under such conditions, the carboxyl groups present in the lignin and the polysaccharide fractions of the pulp dissociated completely. We adjusted the equilibrium data satisfactorily to the Langmuir model, and obtained the values Q=8.26 kg sodium sulfate (Na 2SO4)/o.d, ton pulp and k=62.8 L/g Na2SO 4 for the isothermal parameters. These parameters, incorporated into the WinGEMS simulator, will allow us to obtain the sodium balance and to simulate the totally chlorine free (TCF) kraft pulp process.

M3 - Article

SN - 0734-1415

VL - 1

SP - 21

EP - 23

JO - Tappi journal

JF - Tappi journal

IS - 1

ER -

Adsorption of sodium on O2-prebleached Eucalyptus globulus kraft pulp

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Adsorption of sodium on O₂-prebleached Eucalyptus globulus kraft pulp