INVESTIGATION ON THE INFLUENCE OF HARDWOOD CHIP THICKNESS ON KINETICS OF KRAFT DELIGNIFICATION (RESEARCH NOTE)

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MIRHOSSEINI S.E.; JAHAN LATIBARI A.; KARIMI MAZRAEH SHAHI A.N.; MIRSHOKRAEI SEYED AHMAD

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Journal: Nashrieh Shimi va Mohandesi Shimi Iran Year:2008 | Volume:27 | Issue:3 Page(s): 107-114

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Title

INVESTIGATION ON THE INFLUENCE OF HARDWOOD CHIP THICKNESS ON KINETICS OF KRAFT DELIGNIFICATION (RESEARCH NOTE)

Author(s)

MIRHOSSEINI S.E. | JAHAN LATIBARI A. | KARIMI MAZRAEH SHAHI A.N. | MIRSHOKRAEI SEYED AHMAD | Issue Writer Certificate

Keywords

KINETICSQ2

BULK DELIGNIFICATIONQ3

RESIDUAL DELIGNIFICATIONQ3

HORNBEAMQ3

POPLARQ3

IRONWOODQ3

Abstract

Kraft pulping delignification KINETICS of three hardwood chips (hornbeam, POPLAR and IRONWOOD) is investigated. Equations were developed for both bulk and RESIDUAL DELIGNIFICATION phase at three chip thicknesses of 2, 4 and 6mm. Then the intersection of bulk and RESIDUAL DELIGNIFICATION equations was calculated. Results showed that delignification of HORNBEAM wood is faster than either POPLAR or iron wood, and between the other two woods, delignification proceed faster for POPLAR than IRONWOOD. Residual lignin at transition point for bulk to RESIDUAL DELIGNIFICATION phase was calculated at 2.8 percent for HORNBEAM chips at 6mm thickness. The same amount of residual lignin (2.9 percent) was calculated for POPLAR chips at 4mm thickness and IRONWOOD chips at 2 millimeters thickness (3.8 percent) lignin. Reducing the chip thickness increased the delignification rate further. But as the chip thickness reduces, then delignification approaches a common rate. This indicates that the transport distance is the limiting factor for chemical movement into wood. So if the combined pulping of these three hardwoods is intended, then thicker HORNBEAM and POPLAR chips must be combined with thinner IRONWOOD chips.

Cites

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

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APA: Copy

MIRHOSSEINI, S.E., JAHAN LATIBARI, A., KARIMI MAZRAEH SHAHI, A.N., & MIRSHOKRAEI, SEYED AHMAD. (2008). INVESTIGATION ON THE INFLUENCE OF HARDWOOD CHIP THICKNESS ON KINETICS OF KRAFT DELIGNIFICATION (RESEARCH NOTE). NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN), 27(3), 107-114. SID. https://sid.ir/paper/26138/en

Vancouver: Copy

MIRHOSSEINI S.E., JAHAN LATIBARI A., KARIMI MAZRAEH SHAHI A.N., MIRSHOKRAEI SEYED AHMAD. INVESTIGATION ON THE INFLUENCE OF HARDWOOD CHIP THICKNESS ON KINETICS OF KRAFT DELIGNIFICATION (RESEARCH NOTE). NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN)[Internet]. 2008;27(3):107-114. Available from: https://sid.ir/paper/26138/en

IEEE: Copy

S.E. MIRHOSSEINI, A. JAHAN LATIBARI, A.N. KARIMI MAZRAEH SHAHI, and SEYED AHMAD MIRSHOKRAEI, “INVESTIGATION ON THE INFLUENCE OF HARDWOOD CHIP THICKNESS ON KINETICS OF KRAFT DELIGNIFICATION (RESEARCH NOTE),” NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN), vol. 27, no. 3, pp. 107–114, 2008, [Online]. Available: https://sid.ir/paper/26138/en

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