通过控制包裹在氮掺杂石墨碳上的钴铁合金纳米颗粒的粒径，实现CO加氢反应中的高C-C选择性。
High C-C selectivity in CO hydrogenation by particle size control of Co-Fe alloy nanoparticles wrapped on N-doped graphitic carbon.
作者信息
Peng Lu, Jurca Bogdan, Primo Ana, Gordillo Alvaro, Parvulescu Vasile I, García Hermenegildo
机构信息
Instituto Universitario de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Av. De Los Naranjos s/n, 46022 Valencia, Spain.
Department of Organic Chemistry and Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, Bdul Regina Elisabeta 4-12, Bucharest 030016, Romania.
出版信息
iScience. 2022 Apr 14;25(5):104252. doi: 10.1016/j.isci.2022.104252. eCollection 2022 May 20.
A catalyst based on first-row Fe and Co with a record of 51% selectivity to C-C hydrocarbons at 36% CO conversion is disclosed. The factors responsible for the C selectivity are a narrow Co-Fe particle size distribution of about 10 nm and embedment in N-doped graphitic matrix. These hydrogenation catalysts convert CO into C-C hydrocarbons, including ethane, propane, butane, ethylene and propylene together with methane, CO. Selectivity varies depending on the catalyst, CO conversion, and the operation conditions. Operating with an H/CO ratio of 4 at 300°C and pressure on 5 bar, a remarkable combined 30% of ethylene and propylene at 34% CO conversion was achieved. The present results open the way to develop an economically attractive process for CO reduction leading to products of higher added value and longer life cycles with a substantial selectivity.
公开了一种基于第一行铁和钴的催化剂，在36%的CO转化率下对碳-碳烃的选择性达到51%，创历史记录。对碳选择性负责的因素是约10纳米的狭窄钴-铁粒径分布以及嵌入氮掺杂石墨基质中。这些加氢催化剂将CO转化为碳-碳烃，包括乙烷、丙烷、丁烷、乙烯和丙烯以及甲烷、CO。选择性取决于催化剂、CO转化率和操作条件。在300°C和5巴压力下以H/CO比为4运行时，在34%的CO转化率下实现了乙烯和丙烯的显著总含量30%。目前的结果为开发一种经济上有吸引力的CO还原工艺开辟了道路，该工艺能以高选择性生产附加值更高、生命周期更长的产品。
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