BIOMASS DELIGNIFICATION CHEMICAL PROCEDURE FOR OBTAINING A ROMANIAN SPRUCE WOOD-INSULATING MATERIAL
Keywords:
biomass, removing lignin, spruce wood, alkaline environment, insulation properties
Abstract
A procedure for making a wooden heat-insulating product for construction applications through lignin removing is presented in this paper. The non-conventional procedure is almost similar to that known and used in the pulp and paper industry, but the technological purpose is clearly different. The type of tree wood chosen by authors (Romanian spruce wood) is a novelty compared to the rather large list of tree species tested so far and represents the originality of the work. The liquid alkaline environment was constituted of NaOH, Ca(OH)2, and distilled water and this has activated the spruce wood waste. By removing lignin from the wood structure, heat conductance of the wooden material decreased by comparison with conductance of the same type of non-treated wood. The heat treatment temperature into an electric oven was 95 ℃ for 8 hours. The results showed the possibility to obtain a product with denseness value of 0.14 g·cm-3 and heat conductance of 0.030 W·m-1·K-1, i.e. very good insulation properties. Analyzing the material quality, this was almost identical to high-performance wooden materials.
References
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3. Yadav, V., Kumar, A., Bilal, M., Nguyen, T.A. Chapter 12-Lignin removal from pulp and paper industry waste streams and its application, Nanotechnology in Paper and Wood Engineering, Fundamentals, Challenges and Applications, Micro and Nano Technologies, Elsevier, pp. 265-283, (2022). https://doi.org/10.1016/B978-0-323-85835-9.00019-2
4. Börcsök, Z., Pásztory, Z. The role of lignin in wood working processes using elevated temperatures: an abbreviated literature survey, European Journal of Wood and Wood Products, Springer Link, Vol. 79, No. 4, pp. 511-524, (2021). https://doi.org/10.1007/s00107-020-01637-3
5. Kumar, A., Iyske, T., Petrić, M., Delignified wood from understanding the hierarchically aligned cellulosic structures to creating novel functional materials: A review, Advanced Sustainable Systems, Wiley Online Library, Hoboken, New Jersey, the United States, Vol. 5, No. 5, (2021). https://onlinelibrary.wiley.com>doi>adsu.202000251
6. Liu, H., Zhao, X., Thermal conductivity analysis of high porosity structures with open and closed pores, International Journal of Heat Mass Transfer, Elsevier, Vol. 183, Part A, (2022). https://doi.org/10.1016/j.ijheatmasstransfer.2021.122089
7. Siciliano, A.P., Zhao, X, Fedderwitz, R., Ramakrishnan, K., Dai, J., Gong, A., Zhu, J.Y., Kośny, J., Hu, L. Sustainable wood-waste-based thermal insulation foam for building energy efficiency, Buildings, MDPI, Vol. 13, No. 4, (2023). https://doi.org/10.3390/buildings13040840
8. Wood Foam-From Tree to Foam, Fraunhofer Institute for Wood Research, Braunschweig, Germany, (2021). https://www.wki.fraunhofer.de
9. Paunescu, L., Volceanov, E., Paunescu, B.V., New wood foam-heat insulating material obtained through oak wood-delignification process, Nonconventional Technologies Review, Vol. 27, No. 4, pp. 12-16, (2023). https://www.revtn.ro/index.php/revtn
10. Paunescu, L., Ioana, A., Volceanov, E., Chemical method of biomass delignification as an advanced technique for preparing wood foam with insulating properties, Bulletin of the Polytechnic Institute from Iasi, Chemistry and Chemical Engineering, (2024). (in process of publishing).
11. Nature in Fagaras mountains: The subalpine spruce forests in Romania, (2019). https://www.romania-insider.com/fagaras-subalpine-spruce-forests
12. Sjöström, E., Wood chemistry, Academic Press, Second Edition, San Diego, California, the United States, ISBN 978-0-08-092589-9, (1993). https://doi.org/10.1016/C2009-0-3289-9
13. Ouarhim, W., Zari, N., Bouhfid, R., El Kacem Oaiss, A., Mechanical performance of natural fibers-based thermosetting composites, in Mechanical and physical testing of biocomposites, fibre-reinforced composites and hybrid composites, Woodhead Publishing Series in Composites Science and Engineering, pp. 43-60, (2019). https://doi.org/10.1016/B978-0-08-102292-4.00003-5
14. Law, K.W., Chew, J.J., Yiin, C.L., Lock, S.S.M. Thermal degradation behavior and kinetic modelling of green solvents-delignified biomass: A suitable biomass-to-energy approach, in Value-Chain of Biofuels: Fundamentals, Technology, and Standardization, 1st Edition, Yusup, S., Rashidi, N.A. (eds.), Elsevier, pp. 89-103, ISBN 978-0-12-824388-6, (2022).
15. Density and porosity measurement of solid materials, Anderson Materials Evaluation Inc., Columbia, Maryland, the United States, (2014). https://andersonmaterials.com/density-and-porosity-measurement-of-solid-materials
16. Yűksel, N., The review of some commonly used methods and techniques to measure the thermal conductivity of insulation materials, in Insulation Materials in Context of Sustainability, Almusaed, A., Almssad, A. (eds.), ISBN 978-953-51-2625-6, (2016). https://doi.org/10.5772/64157
17. Michalec, J., Niklasova, S., Water uptake of hardwoods, Växjö University, Sweden, (2006). https://researchgate.net/publication/279481424_Water_uptake_of_hardwoods
Published
2024-09-30
How to Cite
Paunescu, L., Volceanov, E., & Paunescu, B. (2024). BIOMASS DELIGNIFICATION CHEMICAL PROCEDURE FOR OBTAINING A ROMANIAN SPRUCE WOOD-INSULATING MATERIAL. Nonconventional Technologies Review, 28(3). Retrieved from http://revtn.ro/index.php/revtn/article/view/476
Section
Articles
