EVALUATING THE RATE EQUATION OF DELIGNIFICATION REACTION OF POPULUS DELTOIDS WOOD

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BARAZANDEH M.M.; MAHDAVI S.; FAKHRYAN A.

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

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Journal: Iranian Journal of Wood and Paper Science Research Year:2017 | Volume:32 | Issue:1 Page(s): 25-32

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Title

EVALUATING THE RATE EQUATION OF DELIGNIFICATION REACTION OF POPULUS DELTOIDS WOOD

Author(s)

BARAZANDEH M.M. | MAHDAVI S. | FAKHRYAN A. | Issue Writer Certificate

Keywords

POPULUS DELTOIDESQ1

PULPQ2

DELIGNIFICATIONQ2

REACTION RATEQ2

Abstract

The DELIGNIFICATION reaction in PULPing process ofP. deltoides wood was investigated to obtain the relation between residual lignin in the PULP and cooking time. The samples were 10 years old Populus deltoids wood which were collected from Chamestan Research Station located in Noor Mazandaran province. Kraft PULPing with the PULPing conditions; 25% sulfidity, 14% alkali, 5: 1liquor to wood ratio, maximum cooking temperature as 155, 165, 175 degree centigrade. Kappa number and the yield of PULPs were measured and residual lignin was calculated for each sample. Using the models predicted for rate equation and trial and error method in excel software, the order and rate constant of DELIGNIFICATION reaction were evaluated for each cooking temperature. The results show that the rate equations of DELIGNIFICATION reaction of Populus deltoids wood in temperatures of 155oC, 165oC and 175oC have the orders of 5.5, 2.5, 1 and the rate constants of 1.8´10-7 min.-1 conc.-4.5, 7.7´10-4 min.-1 conc.-1.5 and 3.5´10-3 min.-1, respectively. Using these equations, it will be possible to control the PULPing process and predict the time required to obtain a desired lignin content in the PULP.

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APA: Copy

BARAZANDEH, M.M., MAHDAVI, S., & FAKHRYAN, A.. (2017). EVALUATING THE RATE EQUATION OF DELIGNIFICATION REACTION OF POPULUS DELTOIDS WOOD. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, 32(1), 25-32. SID. https://sid.ir/paper/109367/en

Vancouver: Copy

BARAZANDEH M.M., MAHDAVI S., FAKHRYAN A.. EVALUATING THE RATE EQUATION OF DELIGNIFICATION REACTION OF POPULUS DELTOIDS WOOD. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH[Internet]. 2017;32(1):25-32. Available from: https://sid.ir/paper/109367/en

IEEE: Copy

M.M. BARAZANDEH, S. MAHDAVI, and A. FAKHRYAN, “EVALUATING THE RATE EQUATION OF DELIGNIFICATION REACTION OF POPULUS DELTOIDS WOOD,” IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, vol. 32, no. 1, pp. 25–32, 2017, [Online]. Available: https://sid.ir/paper/109367/en

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