SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 54 ›› Issue (2): 89-97.DOI: 10.1016/j.cjche.2022.04.010

• Full Length Article • 上一篇    下一篇

Lignin derived absorbent for efficient and sustainable CO2 capture

Yuandong Cui1,2, Bin He2, Yu Lei2, Yu Liang2, Wanting Zhao1,2, Jian Sun2,3, Xiaomin Liu1   

  1. 1. School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China;
    2. School of Life Science, Beijing Institute of Technology, Beijing 100081, China;
    3. Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Beijing Engineering Research Center of Cellulose and Its Derivatives, Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
  • 收稿日期:2022-03-18 修回日期:2022-04-22 出版日期:2023-02-28 发布日期:2023-05-11
  • 通讯作者: Jian Sun,E-mail:jiansun@bit.edu.cn;Xiaomin Liu,E-mail:liuxiaomin@qdu.edu.cn
  • 基金资助:
    This work was supported by National Natural Science Foundation of China (22078023, 22178187), Natural Science Foundation of Shandong Province (ZR202102180830), Taishan Scholars Program of Shandong Province (tsqn201909091) and the Startup Foundation of China (3160011181808). The authors are highly grateful to Dr. Zhiqiang Wang of East China University of Science and Technology for analysis and revision of the computational part of this work.

Lignin derived absorbent for efficient and sustainable CO2 capture

Yuandong Cui1,2, Bin He2, Yu Lei2, Yu Liang2, Wanting Zhao1,2, Jian Sun2,3, Xiaomin Liu1   

  1. 1. School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China;
    2. School of Life Science, Beijing Institute of Technology, Beijing 100081, China;
    3. Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Beijing Engineering Research Center of Cellulose and Its Derivatives, Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
  • Received:2022-03-18 Revised:2022-04-22 Online:2023-02-28 Published:2023-05-11
  • Contact: Jian Sun,E-mail:jiansun@bit.edu.cn;Xiaomin Liu,E-mail:liuxiaomin@qdu.edu.cn
  • Supported by:
    This work was supported by National Natural Science Foundation of China (22078023, 22178187), Natural Science Foundation of Shandong Province (ZR202102180830), Taishan Scholars Program of Shandong Province (tsqn201909091) and the Startup Foundation of China (3160011181808). The authors are highly grateful to Dr. Zhiqiang Wang of East China University of Science and Technology for analysis and revision of the computational part of this work.

摘要: High and cost-efficient capture of CO2 is a prerequisite and an inevitable path of carbon emission reduction. To address the challenges (high cost, low efficiency, less sustainability, etc.) of existing petroleum-based CO2 absorbents, herein, a class of efficient and sustainable lignin-based absorbents were resoundingly prepared by grafting the active amine group on a lignin derived compound vanillin and alkali lignin. The results demonstrated that vanillin modified by acrylamide achieved the excellent absorption capacity among the three absorbents, whose ability was 0.114 g CO2 per gram of absorbent under 25 ℃ and 100 kPa.In addition, the absorbent retained stable absorbability of CO2 after 6 cycles. The absorbing capacity of the absorbent formed by the coupling of vanillin and acrylamide to CO2 was much greater than their own (i.e. 0 g CO2·g-1 vanillin, 0.01 g CO2·g-1 acrylamide, respectively). Detailed information revealed the multi-site synergistic absorption mechanism, in which CO2 has C and O double interactions with the amide group of the absorbent, and single interaction with the hydroxyl oxygen on the benzene ring of the absorbent. The absorption capacity of modified lignin for CO2 is as high as 0.12 g CO2 per gram of absorbent, which is comparable with that of model compound vanillin. This work not only provides a new idea for the design of bio-absorbents for CO2 capture, but explores the application potential of lignin-based materials.

关键词: Lignin (model compound), CO2 absorption, Amide group, Multi-site, Acid-base, Hydrogen bonding

Abstract: High and cost-efficient capture of CO2 is a prerequisite and an inevitable path of carbon emission reduction. To address the challenges (high cost, low efficiency, less sustainability, etc.) of existing petroleum-based CO2 absorbents, herein, a class of efficient and sustainable lignin-based absorbents were resoundingly prepared by grafting the active amine group on a lignin derived compound vanillin and alkali lignin. The results demonstrated that vanillin modified by acrylamide achieved the excellent absorption capacity among the three absorbents, whose ability was 0.114 g CO2 per gram of absorbent under 25 ℃ and 100 kPa.In addition, the absorbent retained stable absorbability of CO2 after 6 cycles. The absorbing capacity of the absorbent formed by the coupling of vanillin and acrylamide to CO2 was much greater than their own (i.e. 0 g CO2·g-1 vanillin, 0.01 g CO2·g-1 acrylamide, respectively). Detailed information revealed the multi-site synergistic absorption mechanism, in which CO2 has C and O double interactions with the amide group of the absorbent, and single interaction with the hydroxyl oxygen on the benzene ring of the absorbent. The absorption capacity of modified lignin for CO2 is as high as 0.12 g CO2 per gram of absorbent, which is comparable with that of model compound vanillin. This work not only provides a new idea for the design of bio-absorbents for CO2 capture, but explores the application potential of lignin-based materials.

Key words: Lignin (model compound), CO2 absorption, Amide group, Multi-site, Acid-base, Hydrogen bonding