Catalytic ethanolysis of Kraft lignin to small-molecular liquid products over an alumina supported molybdenum nitride catalyst

被引：30

作者：

Chen, Mengmeng ^{[1
]}

Hao, Wenyue ^{[1
]}

Ma, Rui ^{[1
]}

Ma, Xiaolei ^{[1
]}

Yang, Le ^{[1
]}

Yan, Fei ^{[1
]}

Cai, Kai ^{[1
]}

Chen, Hong ^{[2
]}

Li, Yongdan ^{[1
,3
]}

机构：

[1] Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin Key Lab Appl Catalysis Sci & Technol, State Key Lab Chem Engn,Sch Chem Engn, Tianjin 300072, Peoples R China

[2] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China

[3] Aalto Univ, Sch Chem Engn, Dept Chem & Met Engn, Kemistintie 1,POB 16100, FI-00076 Aalto, Finland

来源：

CATALYSIS TODAY | 2017年 / 298卷

基金：

中国国家自然科学基金;

关键词：

Kraft lignin; Catalytic ethanolysis; Supercritical ethanol; Small-molecular products; molybdenum nitride; SOLVOLYSED LIGNOCELLULOSIC BIOMASS; PHENOLIC-COMPOUNDS; ALKALI LIGNIN; HYDRODEOXYGENATION; DEPOLYMERIZATION; CHEMICALS; CONVERSION; FRAGMENTATION; TEMPERATURE; PATHWAYS;

D O I：

10.1016/j.cattod.2017.08.012

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

An alumina supported molybdenum nitride catalyst (Mo2N/Al2O3) is examined for the ethanolysis of Kraft lignin in supercritical ethanol in a batch reactor with an initial nitrogen pressure of 0 MPa (gauge). No char or tar is formed in this process. The Mo loading as well as the nitriding temperature in the catalyst preparation process has a great influence on the activity. The best performance is obtained over 30 wt% Mo2N/Al2O3 catalyst nitrided at 700 degrees C. The overall yields of sulfur-free small-molecular products achieve the maximum value of 1189 mg/g lignin, with aliphatic compounds accounting for 907 mg/g lignin and aromatic compounds 282 mg/g lignin, respectively. Both the product yields and the molecular distribution are also strongly dependent on the reaction time and temperature. Furthermore, the Mo2N/Al2O3 catalyst exhibits an excellent recycle performance with no significant activity loss after at least three runs. After reaction, the bulk structure of Mo2N/Al2O3 catalyst was well-preserved only with a slight surface oxidation.

引用

页码：9 / 15

页数：7

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