Reducing agent and method for producing gas

A reducing agent with a supported basic oxide on an oxygen carrier, including composite metal oxides, addresses the low reactivity of existing carriers, achieving efficient carbon dioxide to carbon monoxide conversion in chemical looping reactions.

JP2025138864APending Publication Date: 2025-09-25SEKISUI CHEMICAL CO LTD
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Patent Information

Application Number
JP2025114902
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2020-03-25
Filing Date
2025-07-08
Publication Date
2025-09-25

AI Technical Summary

Technical Problem

The existing mixed oxygen carrier used in chemical looping reactions for converting carbon dioxide to carbon monoxide lacks sufficient reactivity and interaction with basic oxides, resulting in low conversion efficiency.

Method used

A reducing agent comprising an oxygen carrier with a basic oxide supported on its surface, where the basic oxide is selected from lithium, sodium, potassium, magnesium, manganese, cobalt, strontium, or rubidium, and the oxygen carrier includes vanadium, iron, titanium, molybdenum, yttrium, chromium, lanthanum, nickel, copper, tungsten, or cerium, with a composite metal oxide like Ce 1-x (M) x O y enhancing oxygen vacancy migration.

Benefits of technology

The reducing agent efficiently converts carbon dioxide to carbon monoxide with high efficiency and maintains activity even after repeated use, promoting carbon dioxide conversion at relatively low temperatures.

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Abstract

To provide a reducing agent that has high conversion efficiency of carbon dioxide to carbon monoxide, and can be used, for example, in a chemical looping method, and a method for producing a gas using the reducing agent.SOLUTION: The reducing agent of the present invention is used in the production of a product gas containing carbon monoxide by bringing a raw material gas containing carbon dioxide into contact with the reducing agent to reduce the carbon dioxide, the reducing agent comprising an oxygen carrier having oxygen ionic conductivity and a basic oxide supported on the oxygen carrier. The basic oxide preferably contains at least one selected from the group consisting of lithium (Li), sodium (Na), potassium (K), magnesium (Mg), manganese (Mn), cobalt (Co), strontium (Sr), and rubidium (Rb).SELECTED DRAWING: None
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