能源化学(英文版) ›› 2019, Vol. 39 ›› Issue (12): 29-38.

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Transformations of biomass-based levulinate ester into γ-valerolactone and pyrrolidones using carbon nanotubes-grafted N-heterocyclic carbene ruthenium complexes

Qiujuan Shena, Yi Zhanga, Yiping Zhanga, Shaozao Tana, Jinzhu Chena,b   

  1. a Guangdong Engineering and Technology Research Centre of Graphene-Based Materials and Products, Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, Guangdong, China;
    b Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China
  • 收稿日期:2018-09-26 修回日期:2018-11-21 出版日期:2019-12-15 发布日期:2020-12-18
  • 通讯作者: Shaozao Tan, tsztan@jnu.edu.cn; Jinzhu Chen, chenjz@jnu.edu.cn
  • 基金资助:
    We are grateful for the financial support from the National Natural Science Foundation of China (U1810111, 51872124 and 21676116), Natural Science Foundation of Guangdong Province, China (2018B030311010), the Fundamental Research Funds for the Central Universities (21617431) and Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Zhejiang University (2018BCE002).

Transformations of biomass-based levulinate ester into γ-valerolactone and pyrrolidones using carbon nanotubes-grafted N-heterocyclic carbene ruthenium complexes

Qiujuan Shena, Yi Zhanga, Yiping Zhanga, Shaozao Tana, Jinzhu Chena,b   

  1. a Guangdong Engineering and Technology Research Centre of Graphene-Based Materials and Products, Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, Guangdong, China;
    b Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China
  • Received:2018-09-26 Revised:2018-11-21 Online:2019-12-15 Published:2020-12-18
  • Contact: Shaozao Tan, tsztan@jnu.edu.cn; Jinzhu Chen, chenjz@jnu.edu.cn
  • Supported by:
    We are grateful for the financial support from the National Natural Science Foundation of China (U1810111, 51872124 and 21676116), Natural Science Foundation of Guangdong Province, China (2018B030311010), the Fundamental Research Funds for the Central Universities (21617431) and Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Zhejiang University (2018BCE002).

摘要: As a renewable biomass-based compound with wide applications in food additives, fine chemical synthesis and fuels, γ-valerolactone (GVL) has attached much attention. While, pyrrolidones are widely used in pharmaceutical, agrochemical, material industrial and other chemical production. In this research, we demonstrated transformations of biomass-based ethyl levulinate (EL) into GVL and pyrrolidones by using heterogeneous catalysts (CNT-Ru-1) with N-heterocyclic carbene ruthenium (NHC-Ru) complex grafted on multi-walled carbon nanotube (CNT). The Ru catalyst showed high efficiency on EL hydrogenation to GVL with both EL conversion and GVL yield exceeding 99%. Moreover, the Ru catalyst readily promoted reductive amination of EL in the presence of various amines for pyrrolidone synthesis. Finally, the Ru catalyst was also applicable to hydrogenation of various carbonyl compounds for the synthesis of the corresponding alcohols with excellent catalytic performance. The research provides insight for heterogenizing the homogeneous noble metal-based catalysts with high catalytic active for biomass-based transformations.

关键词: Biomass, Carbene complex, Hydrogenation, Ruthenium, Sustainable chemistry, γ-Valerolactone

Abstract: As a renewable biomass-based compound with wide applications in food additives, fine chemical synthesis and fuels, γ-valerolactone (GVL) has attached much attention. While, pyrrolidones are widely used in pharmaceutical, agrochemical, material industrial and other chemical production. In this research, we demonstrated transformations of biomass-based ethyl levulinate (EL) into GVL and pyrrolidones by using heterogeneous catalysts (CNT-Ru-1) with N-heterocyclic carbene ruthenium (NHC-Ru) complex grafted on multi-walled carbon nanotube (CNT). The Ru catalyst showed high efficiency on EL hydrogenation to GVL with both EL conversion and GVL yield exceeding 99%. Moreover, the Ru catalyst readily promoted reductive amination of EL in the presence of various amines for pyrrolidone synthesis. Finally, the Ru catalyst was also applicable to hydrogenation of various carbonyl compounds for the synthesis of the corresponding alcohols with excellent catalytic performance. The research provides insight for heterogenizing the homogeneous noble metal-based catalysts with high catalytic active for biomass-based transformations.

Key words: Biomass, Carbene complex, Hydrogenation, Ruthenium, Sustainable chemistry, γ-Valerolactone