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Research Article | Open Access

Numerical Simulation of Microwave-assisted Depolymerization of Kraft Lignin

Zhenhao Ma1, Wenliang Wang1,2( ), Jiale Huang1, Yujun Ma1, Hui Miao1, Yishuai Fu1, Xiaoxiao Ren1
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi Province, 710021, China
Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Ji'nan, Shandong Provice, 250353, China
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Abstract

Kraft lignin has the potential to replace traditional fossil resources for the preparation of high-value chemicals because it is rich in aromatic rings and active functional groups. An effective method for the pyrolysis of kraft lignin into chemicals/fuels is microwave-assisted depolymerization. A simulation model is urgently needed to illustrate the coupling effect and mechanism of lignin conversion during the depolymerization process. In this study, COMSOL Multiphysics was used to simulate the microwave-assisted depolymerization process. The results showed that microwave power had a significant effect on the electric field and temperature distribution in the microwave cavity, while the reaction time had little effect on the electric field. The effect of the nitrogen flow rate on the electric field and temperature was negligible. The intensity of the electric field, heating rate of lignin, and final temperature of lignin depolymerization increased with increasing microwave power.

Keywords

numerical simulationCOMSOL Multiphysicsmicrowave depolymerizationkraft lignin

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Paper and Biomaterials
Volume 6 Issue 4,
October 2021
Pages 47-53
DOI: 10.1213/j.issn.2096-2355.2021.04.006
Cite this article:
Ma Z, Wang W, Huang J, et al. Numerical Simulation of Microwave-assisted Depolymerization of Kraft Lignin. Paper and Biomaterials, 2021, 6(4): 47-53. https://doi.org/10.1213/j.issn.2096-2355.2021.04.006

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Received: 26 March 2021
Accepted: 29 April 2021
Published: 25 October 2021
© 2021 Paper and Biomaterials

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
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