抄録
In order to reduce the atmospheric concentration of carbon dioxide (CO2), a greenhouse effect gas, the collection and fixation of the emitted gas must be carried out. In the experiment iron carbonation reaction was examined. Iron powder absorbed CO2 and converted into carbonate in water at room temperature. One gram of iron powder can absorb 450 ml of CO2. The important element for successfully and efficiently absorbing CO2 is maintaining the anaerobic conditions. The rate depended on the partial pressure of CO2 when a sufficient amount of iron was provided. In this reaction, besides carbonate, hydrogen gas (H2) with a volume equal to that of absorbed CO2 was produced by the decomposition of water. The process can reduce CO2 and supply H2 simultaneously at low cost especially when waste iron is effectively used.
