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Title
Anthraquinone-aided hydrogen peroxide reinforced oxygen delignification of oil palm (Elaeis guineensis) EFB pulp: A two-level factorial design
Authors
Soo Huey Ng Arniza Ghazali and Cheu Peng Leh
Received
May 6, 2010
Published
Volume 45 Issue 1-2 January-February
Keywords
peroxide reinforced oxygen delignification, anthraquinone, factorial designs, oil pa lm EFB,
Abstract
The st udy in vestigates the effec t of a nthraquinone tow ards h ydrogen per oxide reinforced ox ygen delignification on o il palm (Elaeis guineensis) empty fruit bunch soda-AQ pulp. The individual and interaction effects of H O and anthraquinone and three other process variables – the reaction temperature, 2 2 time and alkaline charge – were statistically examined by a two-level half factorial experimental design. The factorial models built for four responses – kappa number, pulp viscosity, brightness and selectivity – showed that HO had the greatest effect on all responses. 2 2 Moreover, the response surface of the fa ctorial models showed that the addition of a low amount of anthraquinone (0.02% on the oven-dry weight of pulp) in t he O -stage, even without improving kappa P number reduction, significantly countered impairment to pulp viscosity by a relatively higher level of H O 2 2 (2.0% on the oven-dry weight of pulp). Besides, a sufficient alkali charge was necessary for HO reinforced 2 2 oxygen delignification and uncontrollable viscosity drop.
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