INVESTIGATION ON THE KINETICS OF RESIDUAL PHASES OF DELIGNIFICATION AT PULPING PROCESS OF BAGASSE

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DEHGHANI FIROUZABADI M.; ROUSHENASAN J.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: Journal of Wood and Forest Science and Technology Year:2011 | Volume:18 | Issue:3 Page(s): 1-13

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Title

INVESTIGATION ON THE KINETICS OF RESIDUAL PHASES OF DELIGNIFICATION AT PULPING PROCESS OF BAGASSE

Author(s)

DEHGHANI FIROUZABADI M. | ROUSHENASAN J. | Issue Writer Certificate

Keywords

RATE CONSTANTQ2

ACTIVATION ENERGYQ2

DELIGNIFICATIONQ2

KRAFTQ3

BAGASSEQ2

Abstract

The kinetics of the DELIGNIFICATION at the residual phase of KRAFT pulping of BAGASSE was studied. KRAFT pulping was carried out under chemical charge of 14.11% (as NaOH, based on O.D. BAGASSE), sulfidity of 25.11% and liquor to raw material ratio as 20: 1. The cooking maximum temperatures as 85, 70 and 55oC, were selected and reaction time varied from 0 to 720 min. based on maximum temperature. The initial Klason and acid soluble lignin content of bagaase were measured as 19.23% and 1.87%, respectively. The rate of DELIGNIFICATION was first order with respect to lignin yield based on oven dried raw material and the process at least can be divided into three DELIGNIFICATION phases. The reaction RATE CONSTANTs of DELIGNIFICATION varied with pulping maximum temperature. The values were 1.6×10-3 min-1, 1.5×10-3 min-1 and 1.4×10-3 min-1 for cooking maximum temperature of 85, 70 and 55oC, respectively. The ACTIVATION ENERGY of DELIGNIFICATION was 4.27 kJ/mol for residual phases. Lignin content at the transition point of second and third phases was calculated as 4.66, 5.21 and 6.17 percent for the cooking times of 85, 70 and 55oC, respectively. Thus, at transition points, lignin content of the pulp is a function of pulping temperature and decreases with increasing of cooking temperature.

Cites

مطالعه سینتیک لیگنین زدایی ساقه گندم در فرایند خمیر کاغذسازی با گلیسرول

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APA: Copy

DEHGHANI FIROUZABADI, M., & ROUSHENASAN, J.. (2011). INVESTIGATION ON THE KINETICS OF RESIDUAL PHASES OF DELIGNIFICATION AT PULPING PROCESS OF BAGASSE. JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, 18(3), 1-13. SID. https://sid.ir/paper/156751/en

Vancouver: Copy

DEHGHANI FIROUZABADI M., ROUSHENASAN J.. INVESTIGATION ON THE KINETICS OF RESIDUAL PHASES OF DELIGNIFICATION AT PULPING PROCESS OF BAGASSE. JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY[Internet]. 2011;18(3):1-13. Available from: https://sid.ir/paper/156751/en

IEEE: Copy

M. DEHGHANI FIROUZABADI, and J. ROUSHENASAN, “INVESTIGATION ON THE KINETICS OF RESIDUAL PHASES OF DELIGNIFICATION AT PULPING PROCESS OF BAGASSE,” JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, vol. 18, no. 3, pp. 1–13, 2011, [Online]. Available: https://sid.ir/paper/156751/en

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