<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Kraft lignin was hydrothermally depolymerized at low temperature/short time in water for producing value-added phenolics. The effects of residence time (15, 60 min) and reaction temperature (130, 180, 230ºC) on yields of oils and phenolic compounds were studied in detail. Total oil yield was found to range between 7% and 10%. The compositions of oils were analyzed by GC-MS to confirm the main compound to be guaiacol (2-methoxy phenol) in the range of 12–55% of oil depending on different reaction conditions. The most interesting was the finding that maximum value of total oil yield (10% of kraft lignin) and guaiacol amount (55% of oil) was obtained at 130ºC/15, 60 min which is a low reaction temperature/short time, while the residual kraft lignins were analyzed by FTIR with respect to the conversion mechanism of kraft lignin by this process.</p></abstract>

Kraft lignin was hydrothermally depolymerized at low temperature/short time in water for producing value-added phenolics. The effects of residence time (15, 60 min) and reaction temperature (130, 180, 230ºC) on yields of oils and phenolic compounds were studied in detail. Total oil yield was found to range between 7% and 10%. The compositions of oils were analyzed by GC-MS to confirm the main compound to be guaiacol (2-methoxy phenol) in the range of 12–55% of oil depending on different reaction conditions. The most interesting was the finding that maximum value of total oil yield (10% of kraft lignin) and guaiacol amount (55% of oil) was obtained at 130ºC/15, 60 min which is a low reaction temperature/short time, while the residual kraft lignins were analyzed by FTIR with respect to the conversion mechanism of kraft lignin by this process.

The degradation of kraft lignin during hydrothermal treatment for phenolics

Sichuan University of Science and Engineering, Material and Chemical Engineering Institute, Zigong, 643000, China

Nanjing Forestry University, Jiangsu Provincial Key Laboratory of Pulp and Paper Science and Technology, Nanjing, 210037, China

Kunming University of Science and Technology, P.O. Box A302-12, Building No.5, XinyingYuan, No.50, Huancheng East Road, Kunming, 650051, China (Corresponding affiliation)

Guangxi University, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Nanning, 530004, China

Sichuan University of Science and Engineering, Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, Zigong, 643000, China

Huaiyin Normal University, Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, Huaian, 223300, China

Tianjin University of Science and Technology, Tianjin Key Laboratory of Pulp and Paper, Tianjin, 300457, China

State Key Laboratory of New Ceramics and Fine Processing of Tsinghua University, Beijing, 100084, China

Polish Journal of Chemical Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"The degradation of kraft lignin during hydrothermal treatment for phenolics"}

Kraft lignin was hydrothermally depolymerized at low temperature/short time in water for producing value-added phenolics. The effects of residence time (15, 60...

The degradation of kraft lignin during hydrothermal treatment for phenolics

Online veröffentlicht: 19. Sept. 2015

Seitenbereich: 24 - 28

DOI: https://doi.org/10.1515/pjct-2015-0045

Schlüsselwörter
kraft lignin, hydrothermal treatment, low reaction temperature/short time, oil, phenolics

© Kai Tang et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The degradation of kraft lignin during hydrothermal treatment for phenolics

Online veröffentlicht: 19. Sept. 2015

Seitenbereich: 24 - 28

DOI: https://doi.org/10.1515/pjct-2015-0045

Schlüsselwörterkraft lignin, hydrothermal treatment, low reaction temperature/short time, oil, phenolics

© Kai Tang et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Schlüsselwörter
kraft lignin, hydrothermal treatment, low reaction temperature/short time, oil, phenolics