Bimetallic NiCo catalyzed enzymatic hydrolysis lignin hydrogenolysis to produce aromatic monomers. (1st February 2023)

• Record Type: Journal Article
• Authors: Zhou, Linxuan; Zhu, Zhengchen; Luo, Bowen; He, Yao; Shu, Riyang; Tian, Zhipeng; Wang, Chao
• Is Part Of: Fuel. Volume 333(2023)Part 2
• Publication Date: 2023-02-01
• Subjects: Enzymatic hydrolysis lignin -- Hydrogenolysis -- Bimetallic catalyst -- NiCo/C -- Synergistic effect; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2022.126357
• Languages: English
• ISSNs: 0016-2361

Abstract

Highlights: Non-noble bimetallic NiCo catalyst was proposed to conduct lignin hydrogenolysis. 20.8 wt% yield of monomer products and 94.6% lignin liquefaction were obtained. The catalytic performance of NiCo/C was much better than those of Ni/C and Co/C. Synergetic effect between Ni and Co species promoted the catalytic activity. NiCo/C had a superior hydrogen transformation ability and hydrogenolysis activity. Abstract: Bimetallic catalyst gets increasing attention for the lignin valorization due to its outstanding catalytic activity. Herein, the non-noble bimetallic catalyst NiCo/C was proposed to conduct the hydrogenolysis of enzymatic hydrolysis lignin. 20.8 wt% yield of monomer products and 94.6% lignin liquefaction degree were obtained at the temperature of 260 °C, which was superior to the catalytic performances of Ni/C and Co/C catalysts. A series of catalyst characterizations were conducted to reveal the mechanism of bimetallic catalysis, including BET, XRD, SEM, TEM, XPS and H2 -TPD methods. Results showed that the synergistic effect between Ni and Co species was the main reason for its high catalytic activity, which resulted in a superior hydrogen transformation ability and hydrogenolysis activity. GC–MS, GPC, elemental analysis and FT-IR measurements were also used to investigate the hydrogenolysis products and the results also confirmed the superiority of bimetallic NiCo catalyst resulted from synergistic effect of Ni and Co.