Ternary Cobalt-Copper-Niobium Catalysts for the Selective CO Hydrogenation to Higher Alcohols

被引:57
作者
Xiang, Yizhi [1 ,2 ]
Barbosa, Roland [1 ,2 ]
Li, Xiaonian [3 ]
Kruse, Norbert [1 ,2 ]
机构
[1] Univ Libre Bruxelles, Chem Phys Mat Catalysis Tribol, B-1050 Brussels, Belgium
[2] Washington State Univ, Voiland Sch Chem Engn & Bioengn, Pullman, WA 99164 USA
[3] Zhejiang Univ Technol, State Key Lab Breeding Base Green Chem Synth Tech, Ind Catalysis Inst, Hangzhou 310014, Zhejiang, Peoples R China
来源
ACS CATALYSIS | 2015年 / 5卷 / 05期
基金
美国国家科学基金会;
关键词
CO hydrogenation; C-2-C-5; alcohols; CoCuNb; bimodal structure; SMSI effect; FISCHER-TROPSCH SYNTHESIS; CARBON-MONOXIDE; SYNTHESIS GAS; CHAIN-LENGTH; NANOPARTICLES; HYDROCARBONS; MECHANISM; OXIDATION; OLEFINS; DESIGN;
D O I
10.1021/acscatal.5b00388
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
Novel "CoCuNb" ternary catalysts with bimodal nanosized particle structure, in the absence of a generic support material, were designed and successfully tested in higher alcohol production via CO hydrogenation. The selectivities to primary alcohols with an optimized C-2-C-5 slate usually exceeded the 50 wt % level, and the combined selectivities to 1-alcohols/1-alkenes reached up to similar to 73 wt % for CO conversions ranging between similar to 5% and nearly 20%. The bimodal nanosized particle distribution, achieved through oxalate coprecipitation, contained Co-Cu particles with sizes ranging from 25 to 40 nm. Smaller particles between 4 and 8 nm were identified as Nb oxides and played the role of a structural dispersant ("spacer") and promoter of 1-alcohol/1-olefin production. X-ray photoelectron spectroscopy revealed NbOx to contain major amounts of species with Nb in the 4+ oxidation state.
引用
收藏
页码:2929 / 2934
页数:6
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