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WO-2026094946-A1 - CATALYST COMPOSITION FOR CATALYZING FISCHER-TROPSCH REACTION OR DIRECT FISCHER-TROPSCH REACTION

WO2026094946A1WO 2026094946 A1WO2026094946 A1WO 2026094946A1WO-2026094946-A1

Abstract

The present invention addresses the problem of providing a catalyst composition for catalyzing a Fischer-Tropsch reaction or a direct Fischer-Tropsch reaction, the catalyst composition being capable of suppressing the production of methane by the FT reaction or the direct FT reaction. The present invention provides a catalyst composition for catalyzing a Fischer-Tropsch reaction or a direct Fischer-Tropsch reaction, the catalyst composition containing: (a) an oxide that contains Ba and Co and may contain F; and (b) one or more substances selected from among oxides, carbonates, and nitrates of group 1 elements.

Inventors

  • SHIDA ATSUSHI
  • ISHIGAI Kohei
  • TAKEMURA SHOTA
  • KATO KOHEI
  • KOMANOYA TASUKU

Assignees

  • 三井金属株式会社

Dates

Publication Date
20260507
Application Date
20251029
Priority Date
20241030

Claims (13)

  1. The following ingredients: (a) an oxide comprising Ba and Co, and possibly F; and (b) a catalyst composition for catalyzing a Fischer-Tropsch reaction or a direct Fischer-Tropsch reaction, comprising one or more selected from oxides, carbonates, and nitrates of Group 1 elements.
  2. The catalyst composition according to claim 1, wherein the ratio of the molar amount of Co to the molar amount of Ba is 0.20 or more and 1.20 or less.
  3. The catalyst composition according to claim 1, wherein the ratio of the molar amount of F to the molar amount of Ba is 0.010 or more and 0.150 or less.
  4. The catalyst composition according to claim 1, wherein component (a) comprises one or more additional elements selected from Group 3, Group 4, and Group 5 elements.
  5. The catalyst composition according to claim 4, wherein the one or more additional elements are selected from Group 3 and Group 4 elements.
  6. The catalyst composition according to claim 4, wherein the ratio of the molar amount of the one or more additional elements to the molar amount of the Ba is 0.40 or more and 0.85 or less.
  7. The catalyst composition according to claim 4, wherein the ratio of the total molar amounts of Co and the one or more additional elements to the molar amount of Ba is 0.70 or more and 1.30 or less.
  8. The catalyst composition according to claim 4, wherein the ratio of the molar amount of Co to the total molar amount of Co and the one or more additional elements is 0.20 or more and 0.99 or less.
  9. The aforementioned one or more additional elements include one or more Group 4 elements, The catalyst composition according to claim 4, wherein the ratio of the molar amount of the one or more Group 4 elements to the total molar amount of the Co and the one or more additional elements is 0.01 or more and 0.70 or less.
  10. The catalyst composition according to claim 4, wherein component (a) comprises one or more selected from Y, Ce, and La.
  11. The catalyst composition according to claim 4, wherein component (a) contains Zr.
  12. The catalyst composition according to any one of claims 1 to 11, wherein at least a portion of component (b) is supported on component (a).
  13. The catalyst composition according to any one of claims 1 to 11, wherein component (b) comprises one or more selected from sodium oxides, carbonates, and nitrates.

Description

Catalyst composition for catalyzing the Fischer-Tropsch reaction or the direct Fischer-Tropsch reaction This invention relates to a catalyst composition for catalyzing the Fischer-Tropsch reaction (hereinafter referred to as the "FT reaction") or the direct Fischer-Tropsch reaction (hereinafter referred to as the "direct FT reaction"). In recent years, due to increasingly stringent environmental regulations worldwide and growing environmental awareness, alternative energy sources to replace petroleum resources have attracted attention, and interest in FT reactions, which synthesize hydrocarbons from CO and H₂ , and direct FT reactions, which synthesize hydrocarbons from CO₂ and H₂, has been growing. Patent Document 1 discloses an FT reaction catalyst comprising a support having a specific average pore size on which a metal selected from iron, cobalt, nickel, and ruthenium is supported. Patent Document 2 discloses an FT reaction process using a catalyst in which iron-containing particles are dispersed on an α-alumina support. Figure 1 shows XRD diffraction charts obtained by performing XRD on sample powders obtained by grinding each catalyst composition of Example 1 and Comparative Example 2 in an agate mortar, as well as on sample powders obtained by grinding each reference compound, BaZrO3 , BaCO3 , Co3O4 , and ZrO2, in an agate mortar. ≪Catalyst composition≫ The catalyst composition of the present invention (hereinafter referred to as "the Composition") will be described below. This composition is a catalyst composition that catalyzes FT reactions or direct FT reactions. The FT reaction is a reaction that synthesizes hydrocarbons from CO and H₂ , and is represented by the following reaction equation. nCO+2nH 2 →-(CH 2 ) n -+nH 2 O The direct FT reaction is a reaction that synthesizes hydrocarbons from CO₂ and H₂ , and is represented by the following reaction equations (1) and (2). CO 2 + H 2 → CO + H 2 O...(1) nCO+2nH 2 →-(CH 2 ) n -+nH 2 O...(2) The reaction represented by reaction equation (1) is a reverse water-gas shift reaction (hereinafter referred to as the "RWGS reaction"), and the reaction represented by reaction equation (2) is an FT reaction. The CO produced by the RWGS reaction is used as the raw material gas for the FT reaction. When this catalyst composition catalyzes a direct FT reaction, it catalyzes a series of reactions including an RWGS reaction and an FT reaction carried out using the CO produced by the RWGS reaction as the source gas. This catalyst composition is, for example, in powder form. It may also be molded into desired forms such as pellets or layers. This catalyst composition contains the following components: (a) an oxide containing Ba and Co, and possibly containing F; and (b) one or more selected from oxides, carbonates and nitrates of Group 1 elements. This catalyst composition can exhibit a methane production suppression effect when catalyzing FT reactions or direct FT reactions. The methane production suppression effect can be evaluated based on the CH4 selectivity. Specifically, a lower CH4 selectivity indicates a greater methane production suppression effect. The significance of CH4 selectivity is as described in the examples. This catalyst composition, when catalyzing a FT reaction or a direct FT reaction, can exhibit both a methane production suppression effect and a C5+ production promotion effect. The C5+ production promotion effect can be evaluated based on the C5+ selectivity. Specifically, a higher C5+ selectivity indicates a greater C5+ production promotion effect. The significance of C5+ selectivity is as described in the examples. The following describes component (a). Component (a) is, for example, particulate. Component (a) may or may not contain F. If component (a) does not contain F, component (a) is a complex oxide. If component (a) contains F, component (a) is a complex acid fluoride. Each composite oxide and composite oxyfluoride contains two or more metallic elements. These two or more metallic elements consist of Ba, Co, and optionally one or more additional elements M. The additional elements M will be described later. A composite oxide is a composite of two or more metal oxides. In the composite, the two or more metal oxides are chemically bonded together. The composite also includes a solid solution of two or more metal oxides. In the present invention, the two or more metal oxides consist of an oxide of Ba, an oxide of Co, and optionally an oxide of one or more additional elements M. The oxide of Ba is BaO. The oxide of Co is one or more selected from CoO, Co₂O₃ , and Co₃O₄ . The oxide of Co is preferably Co₃O₄ . The oxide of the additional element M will be described later. Complex oxyfluorides are compounds in which some of the oxygen atoms in a complex oxide are replaced with fluorine atoms. The Co contained in component (a) functions as a catalytically active component that catalyzes the FT reaction and the RWGS reaction. The catalytically a