CoZn/N-Doped porous carbon derived from bimetallic zeolite imidazolate framework/g-C3N4 for efficient hydrodeoxygenation of vanillin

被引:16
作者
Qiu, Zegang [1 ]
He, Xiaoxia [1 ]
Li, Zhiqin [1 ]
Guan, Qichen [2 ]
Ding, Liang [1 ]
Zhu, Yanan [1 ]
Cao, Yueling [2 ,3 ]
机构
[1] Xian Shiyou Univ, Xian 710065, Peoples R China
[2] Northwestern Polytech Univ, Sch Chem & Chem Engn, Xian Key Lab Funct Organ Porous Mat, Xian 710129, Peoples R China
[3] Northwestern Polytech Univ, Chongqing Sci & Technol Innovat Ctr, Chongqing 401135, Peoples R China
基金
中国国家自然科学基金;
关键词
HIGHLY-EFFICIENT; ORGANIC POLYMER; CATALYSTS; LIGNIN; BIOMASS; HYDROGENATION; RU;
D O I
10.1039/d2cy00642a
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The development of non-noble metal catalysts with high efficiency for the hydrodeoxygenation (HDO) of bio-oil is of great importance for the utilization of lignin biomass resources. As a crucial lignin-based platform chemical, vanillin is a promising candidate for the production of fine chemicals and polymers. Here, a promising non-noble Co-Zn/NPC catalyst (NPC: nitrogen-doped porous carbon materials) for the HDO of vanillin was prepared by pyrolysis of Co-Zn zeolite imidazolate framework/graphitic carbon nitride (Co-Zn-ZIF/g-C3N4) composites. Full vanillin conversion with 99% MMP (2-methoxy-4-methylphenol) selectivity could be achieved at 100 degrees C and 1 MPa H-2 over 4Co-1Zn/NPC. Characterization results indicate that the presence of g-C3N4 promotes the formation of mesopores, which is beneficial for fast mass transfer. Additionally, the introduction of Zn downsizes the size of Co nanoparticles, and lowers the electron density around the Co atoms in Co-Zn/NPC catalysts, which can accelerate the hydrogenation of vanillin. More importantly, the Zn introduced in the catalyst may function as a basic site to facilitate the conversion of the intermediate HMP (4-hydroxy-3-methoxybenzyl alcohol) into MMP, thus enhancing the MMP selectivity. Moreover, Co-Zn/NPC presents excellent stability in the HDO reaction of vanillin. This work provides some useful insights into the design of novel non-noble metal catalysts with high efficiency for HDO of bio-oil.
引用
收藏
页码:5178 / 5188
页数:11
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