Carbon recovery from dry smelting flue gases

Carbon recovery from CO₂ and CO containing gas Use as raw material for ironmaking

Overview

　The steel industry, which emits the largest amount of carbon dioxide (CO₂), is required to reduce its CO₂ emissions as soon as possible.
　A process for recovering and recycling solid carbon from gases containing CO₂ and carbon monoxide (CO) is known. This process uses water gas shift reaction (CO₂+H2→CO+H2O) and carbon deposition reaction (2CO→C+CO2, CO+H2→C+H2O). However, there has been concern that the precipitated carbon is fine and difficult to recover.
　This invention enables carbon recovery from CO2 and CO in gas by using porous fibrous iron (iron whisker) as a carbon deposition site. Furthermore, iron raw materials containing carbon could be used directly in the ironmaking process. This may lead to the carbon cycle process in the ironmaking process.

Carbon cycle process flow

Product Application

・Carbon recovery from CO2 and CO containing gas
・Use as raw material for ironmaking

IP Data

IP No.　 ： WO2023/171466
Inventor ： MURAKAMI Taichi
keyword ： Carbon recovery, steel making, iron making