Wet oxidation of activated carbon for enhanced adsorptive removal of lignin from the prehydrolysis liquor of kraft-based dissolving pulp production in an integrated forest biorefinery

Baobin Wang; Guihua Yang; Qiang Wang; Lucian A. Lucia; Tingpeng Jia; Jiachuan Chen; Guigan Fang

doi:10.21967/jbb.v2i2.66

文章导航 > Journal of Bioresources and Bioproducts > 2017 > 2(2): 73-81

Baobin Wang, Guihua Yang, Qiang Wang, Lucian A. Lucia, Tingpeng Jia, Jiachuan Chen, Guigan Fang. Wet oxidation of activated carbon for enhanced adsorptive removal of lignin from the prehydrolysis liquor of kraft-based dissolving pulp production in an integrated forest biorefinery[J]. Journal of Bioresources and Bioproducts, 2017, 2(2): 73-81. doi: 10.21967/jbb.v2i2.66

引用本文:

Citation:

Baobin Wang, Guihua Yang, Qiang Wang, Lucian A. Lucia, Tingpeng Jia, Jiachuan Chen, Guigan Fang. Wet oxidation of activated carbon for enhanced adsorptive removal of lignin from the prehydrolysis liquor of kraft-based dissolving pulp production in an integrated forest biorefinery[J]. Journal of Bioresources and Bioproducts, 2017, 2(2): 73-81. doi: 10.21967/jbb.v2i2.66

引用本文:

Citation:

Baobin Wang, Guihua Yang, Qiang Wang, Lucian A. Lucia, Tingpeng Jia, Jiachuan Chen, Guigan Fang. Wet oxidation of activated carbon for enhanced adsorptive removal of lignin from the prehydrolysis liquor of kraft-based dissolving pulp production in an integrated forest biorefinery[J]. Journal of Bioresources and Bioproducts, 2017, 2(2): 73-81. doi: 10.21967/jbb.v2i2.66

Wet oxidation of activated carbon for enhanced adsorptive removal of lignin from the prehydrolysis liquor of kraft-based dissolving pulp production in an integrated forest biorefinery

doi: 10.21967/jbb.v2i2.66

a. Key Laboratory of Pulp & Paper Science & Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong 250353, China;
b. The Laboratory of Soft Materials & Green Chemistry, Departments of Forest Biomaterials, Chemistry, North Carolina State University, Raleigh, 27695, U.S.A;
c. Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China

基金项目:

The authors are grateful for the financial support from the National Natural Science Foundation of China (Grant No.:31370580 and 31470602), and Taishan Scholars Project Special Funds.

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出版历程

Wet oxidation of activated carbon for enhanced adsorptive removal of lignin from the prehydrolysis liquor of kraft-based dissolving pulp production in an integrated forest biorefinery

a. Key Laboratory of Pulp & Paper Science & Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong 250353, China;
b. The Laboratory of Soft Materials & Green Chemistry, Departments of Forest Biomaterials, Chemistry, North Carolina State University, Raleigh, 27695, U.S.A;
c. Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China

Funds:

The authors are grateful for the financial support from the National Natural Science Foundation of China (Grant No.:31370580 and 31470602), and Taishan Scholars Project Special Funds.

摘要

摘要: Prehydrolysis is a key step for the production of kraft-based dissolving pulp. The pre-hydrolysis liquor mainly contains hemicellulosic components. Lignin can also be released into the pre-hydrolysis liquor, which hinders the purification and utilization of these hemicellulosic components. In this work, wet oxidation of activated carbon with nitric acid was employed to enhance the adsorptive removal of lignin from the pre-hydrolysis liquor. Under mild oxidation conditions (2% nitric acid solution), the oxidization of activated carbon resulted in significant enhancement of lignin removal. Adsorption isotherms showed that the specific surface area and the amount of carboxyl groups were affected by the oxidation treatment. The selective removal of lignin fitted well with the pseudo-second order kinetics model.
- Prehydrolysis /
- Activated carbon /
- Lignin /
- Kraft-based dissolving pulp /
- Integrated forest biorefinery
Abstract: Prehydrolysis is a key step for the production of kraft-based dissolving pulp. The pre-hydrolysis liquor mainly contains hemicellulosic components. Lignin can also be released into the pre-hydrolysis liquor, which hinders the purification and utilization of these hemicellulosic components. In this work, wet oxidation of activated carbon with nitric acid was employed to enhance the adsorptive removal of lignin from the pre-hydrolysis liquor. Under mild oxidation conditions (2% nitric acid solution), the oxidization of activated carbon resulted in significant enhancement of lignin removal. Adsorption isotherms showed that the specific surface area and the amount of carboxyl groups were affected by the oxidation treatment. The selective removal of lignin fitted well with the pseudo-second order kinetics model.
- Prehydrolysis /
- Activated carbon /
- Lignin /
- Kraft-based dissolving pulp /
- Integrated forest biorefinery