Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (8): 1826.doi: 10.7503/cjcu20200232

• Physical Chemistry • Previous Articles     Next Articles

Hydrogenation of α-Pinene Catalyzed by Ru Nanoparticles Stabilized by Magnetic Alkali Lignin Amine

CHEN Xiangyun1, ZHU Benqiang1, YUAN Bing1, YU Fengli1, XIE Congxia1, YU Shitao2   

  1. 1. State Key Laboratory Base of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao 266042, China;
    2. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
  • Received:2020-04-26 Online:2020-08-10 Published:2020-07-31
  • Supported by:
    Supported by the the National Natural Science Foundation of China(Nos.31870554, 31470595), the Key R & D Plan of Shandong Province, China(No.2017GGX40105) and the Taishan Scholars Projects of Shandong Province, China(No.ts201511033).

Abstract: Alkali lignin amine was prepared by introducing amine into alkali lignin structure via Mannich reaction to improve the stability performance for metal nanoparticles. Then the alkali lignin amine was wrapped around Fe3O4 magnetic nucleus by co-precipitation method and used as a carrier to construct Ru metal nanoparticle catalyst for hydrogenation of α-pinene. Elemental analysis(EA), X-ray diffraction(XRD), Fourier transform infrared(FTIR), inductively coupled plasma-atomic emission spectroscopy(ICP-AES), transmission electron microscope(TEM), thermogravimetric analysis(TG), X-ray photoelectron spectroscopy(XPS) and other characterizations showed that except for the benzene ring and oxygen-containing groups in alkali lignin, the introduced amine source had exhibited more efficient stabilization for metal nanoparticles. Fe3O4@0.8ALN1-Ru, with a Ru loading of 1.92 mmol/g and Ru particle size of (2.1±0.5) nm, was found the most active catalyst of α-pinene hydrogenation after the study on catalyst preparation process, lignin type, amine source type and amine content. It exhibited a good catalytic performance with 99.64% conversion of α-pinene and 96.52% selectivity for cis-pinene when it catalyzed 1 mL of α-pinene and 1 MPa H2 at a dosage of 0.05 g and 70℃ for 2 h. Moreover, it's good reuse stability confirmed by a five-run test, which provides a novel method for the development of high value-added lignin-based catalysts.

Key words: Alkali lignin amine, Nanoparticles, α-Pinene, Hydrogenation

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