Supported ε/ε′ iron carbide catalyst for Fischer-Tropsch synthesis reaction, preparation method thereof and Fischer-Tropsch synthesis process

US11007510B2 · kind B2 · utility

Assignees

• China Energy Investment Corporation Limited · CN
• National Institute of Clean-and-Low-Carbon Energy · CN

Inventors

• Peng Wang · Beijing, CN
• Kui Zhagn · Beijing, CN
• Yijun Lv · Beijing, CN
• Quan Lin · Beijing, CN
• Bo Feng · Beijing, CN
• Zhuowu Men · Beijing, CN
• Fengbo Zhang · Dengzhou, CN
• Qi Sun · Centereach, US
• Ping Miao · Singapore, SG

Key dates

• Filing date: Jun 21, 2018
• Grant date: May 18, 2021
• Expiry date: Jun 21, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2523/745
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present disclosure relates to the technical field of Fischer-Tropsch synthesis reaction catalysts, and discloses a supported ε/ε′ iron carbide catalyst for Fischer-Tropsch synthesis reaction, preparation method thereof and Fischer-Tropsch synthesis process, wherein the method comprises the following steps: (1) dipping a catalyst carrier in a ferric salt aqueous solution, drying and roasting the dipped carrier to obtain a catalyst precursor; (2) subjecting the catalyst precursor and H2 to a precursor reduction at the temperature of 300-550° C.; (3) pretreating the material obtained in the step (2) with H2 and CO at the temperature of 90-185° C., wherein the molar ratio of H2/CO is 1.2-2.8:1; (4) preparing carbide with the material obtained in the step (3), H2 and CO at the temperature of 200-300° C., wherein the molar ratio of H2/CO is 1.0-3.2:1. The preparation method has the advantages of simple and easily obtained raw materials, simple and convenient operation steps, being capable of preparing the catalyst with 100% pure phase ε/ε′ iron carbide as the active phase, the catalyst has lower selectivity of CO2 and CH4 and higher selectivity of effective products.