Dissolving pulp production from auto-hydrolyzed Kenaf stalk fibers by Soda-AQ process in biorefinery approach

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JALALI TORSHIZI H.; DAHMARDEH GHALEHNOU M.; KHALILI GASHT ROUDKHANI A.; ESMAEILI M.H.

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Journal Paper

Paper Information

Journal: Journal of Forest and Wood Products Year:2019 | Volume:71 | Issue:4 Page(s): 357-366

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Title

Dissolving pulp production from auto-hydrolyzed Kenaf stalk fibers by Soda-AQ process in biorefinery approach

Author(s)

JALALI TORSHIZI H. | DAHMARDEH GHALEHNOU M. | KHALILI GASHT ROUDKHANI A. | ESMAEILI M.H. | Issue Writer Certificate

Keywords

Alpha-celluloseQ2

BiorefineryQ1

Dissolving pulpQ1

Kenaf stalkQ1

Pre-hydrolyzeQ1

Abstract

Dissolving pulp, generally producing from wood and cotton linter and is determined as high α-cellulose which is widely used by numerus cellulosic products like microcelluloses, nanocelluloses and various cellulose derivatives. Huge attempts have been focused on non-woods as pulping raw materials, due to limitations of the resources of wood and cotton. Extreme exploitation of biomass via extraction and conversion of unsuitable components respect to a special application (non-cellulosic materials in Dissolving pulp) is Biorefinery purpose. Toward Biorefinery approach, in this study Kenaf (Hibiscus cannabinus) stalk Pre-hydrolyzed by hot water and the optimum residence time (40min) at 160 oC was selected based on the stalk yield loss (27 wt%) and then subjected to soda-anthraquinone pulping at different alkaline and time levels. Concerning optimum purity and brightness, the pulped biomass under 22 wt% alkalinity at 90 min with 17. 8 kappa NO and pulping yield of 65. 9 wt% was followed by AD1EpD2P bleaching sequences based on kappa factors of 0. 3, 0. 4 and 0. 45. Pre-hydrolyze treatment revealed that the yield and acidity reduced due to hemicelluloses removal that were increased by longer times which is valuable respected to the Biorefinery approach and α-cellulose requirements. Bleaching Kappa factor of 0. 45 resulted in: kappa NO. 1, yield 30. 6 wt% (based on the Kenaf stalk), α-cellulose 94. 1 wt%, viscosity 6. 4 cP, ash content 0. 51%, DP 1670, and brightness 80. 9 respectively. Kappa factor increment led to yield (-2. 2%) and ash (-0. 25%) loss, together with increase in viscosity (+2%), brightness (+4. 3%) and degree of polymerization (+360). Therefore, Kenaf stalk could be used as a proper non woody feedstock for α-cellulose production.

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APA: Copy

JALALI TORSHIZI, H., DAHMARDEH GHALEHNOU, M., KHALILI GASHT ROUDKHANI, A., & ESMAEILI, M.H.. (2019). Dissolving pulp production from auto-hydrolyzed Kenaf stalk fibers by Soda-AQ process in biorefinery approach. JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES), 71(4 ), 357-366. SID. https://sid.ir/paper/397090/en

Vancouver: Copy

JALALI TORSHIZI H., DAHMARDEH GHALEHNOU M., KHALILI GASHT ROUDKHANI A., ESMAEILI M.H.. Dissolving pulp production from auto-hydrolyzed Kenaf stalk fibers by Soda-AQ process in biorefinery approach. JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES)[Internet]. 2019;71(4 ):357-366. Available from: https://sid.ir/paper/397090/en

IEEE: Copy

H. JALALI TORSHIZI, M. DAHMARDEH GHALEHNOU, A. KHALILI GASHT ROUDKHANI, and M.H. ESMAEILI, “Dissolving pulp production from auto-hydrolyzed Kenaf stalk fibers by Soda-AQ process in biorefinery approach,” JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES), vol. 71, no. 4 , pp. 357–366, 2019, [Online]. Available: https://sid.ir/paper/397090/en

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