Effects of Thermal Stabilization and Electron Beam Irradiation on the Characteristics of Lignin Extracted from Black Liquor

Abstract:

In the present work, lignin extracted from black liquor, which is industrial waste of pulp manufacturing. The extracted lignin was irradiated at various electron beam intensities from 100 to 1000 kGy. Also, the extracted lignin was thermally stabilized by heat treatment process. The characteristics of the stabilized and irradiated lignin materials were examined by means of TGA, ATR-FTIR, EA, and SEM. The ATR-FTIR result shows that both stabilized and irradiated lignin samples exhibit the decrease of characteristic absorption peaks, indicating the presence of guaiacyl and syringyl groups in the lignin structure. It reveals that the irradiation done to the ‘as-extracted’ lignin with appropriate electron beam intensity provides an efficiency as thermal stabilization of the lignin, suggesting that electron beam irradiation may apply directly to the extracted lignin, prior to carbonization the lignin without thermal stabilization process.

• Periodical: Defect and Diffusion Forum (Volume 381)
• Pages: 64-68
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.381.64
• Online since: November 2017
• Authors: Dae Kyun Hwang, Jeong Ho Kim, Oh Hyeong Kwon, Won Ho Park, Dong Hwan Cho*
• Keywords: Black Liquor, Characteristics, Electron Beam Irradiation, Lignin, Thermal Stabilization

References

[1] H. Cheng H, H. Zhan H, S. Fu S, L.A. Lucia, Alkali extraction of hemicellulose from depithed corn stover and effects on soda-aq pulping, Bioresources. 11 (2010) 196-206.

DOI: 10.15376/biores.6.1.196-206

[2] M.M. Ibrahim, F.A. Agblevor, W.K. EL-Zawawy, Isolation and characterization of cellulose and lignin from steam-exploded lignocellulosic biomass, Bioresources. 5 (2010) 397-418.

[3] C. Fox, Chemical and thermal characterization of three industrial lignins and their corresponding lignin esters, M.S. Thesis, University of Idaho, Moscow, Idaho, USA, (2007).

[4] M. Takayama, T. Johjima, T. Yamanaka, H. Wariishi, H. Tanaka, Fourier transform Raman assignment of guaiacyl and syringyl marker bands for lignin determination, Spectrochimica Acta Part A. 53 (1997) 1621-1628.

DOI: 10.1016/s1386-1425(97)00100-5

[5] I. Brodin, E. Sjoholm, G. Gellerstedt, The behavior of kraft lignin during thermal treatment, J. Anal. Appl. Pyrolysis. 87 (2010) 70-77.

DOI: 10.1016/j.jaap.2009.10.005

[6] H. Haykiri-Acma, S. Yaman, S. Kucukbayrak, Comparison of the thermal reactivities of isolated lignin and holocellulose during pyrolysis, Fuel Process Technol. 91 (2010) 759-764.

DOI: 10.1016/j.fuproc.2010.02.009