Pure phase ε/ε' iron carbide catalyst for Fischer-Tropsch synthesis reaction, preparation method thereof and Fischer-Tropsch synthesis process

US11471872B2 · kind B2 · utility

Assignees

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

Inventors

• Peng Wang · Beijing, CN
• Yijun Lv · Beijing, CN
• Kui Zhagn · Beijing, CN
• Fuguo Jiang · Beijing, CN
• Zhuowu Men · Beijing, CN
• Tao Wang · Beijing, CN
• Qi Sun · Centereach, US
• Ping Miao · Singapore, SG

Key dates

• Filing date: Jun 21, 2018
• Grant date: Oct 18, 2022
• Expiry date: Oct 11, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P30/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present disclosure relates to the field of Fischer-Tropsch synthesis reaction catalysts, and discloses a pure phase ε/ε′ iron carbide catalyst for Fischer-Tropsch synthesis reaction, a preparation method thereof and a Fischer-Tropsch synthesis process, wherein the method comprises the following steps: (1) subjecting the nanometer iron powder or a nano-powder iron compound capable of obtaining the nanometer iron powder through in-situ reduction and H2 to a surface purification treatment at the temperature of 250-510° C.; (2) pretreating the material obtained in the step (1) with H2 and CO at the temperature of 80-180° C., wherein the molar ratio of H2/CO is 1.2-2.8:1; (3) carrying out carbide preparation with the material obtained in the step (2), H2 and CO at the temperature of 180-280° C., wherein the molar ratio of H2/CO is 1.0-3.0:1. The preparation method has the advantages of simple and easily obtained raw materials, simple and convenient operation steps, being capable of preparing the 100% pure phase ε/ε′ iron carbide catalyst having lower selectivity of CO2 and CH4 and higher selectivity of effective products.