Carbon Dioxide Electrolysis for a Carbon-recycling Iron-making System

摘要

A new energy transformation system based on carbon recycling has been proposed; it is called the active carbon recycling energy system (ACRES) and has been developed in order to reduce the emission of carbon dioxide (CO_2) to the atmosphere. An experimental study based on the ACRES concept for carbon monoxide (CO) regeneration via high-temperature electrolysis of CO_2 was carried out using several solid oxide electrolysis cells (SOECs). Experimental results showed that a cell with the structure Pt-LSM cermet|YSZ|Pt-LSM cermet exhibited the highest current density and CO production rates of 0.52 mA·cm~(-2) and 0.75 μmol·min~(-1)·cm~(-2) respectively, at 900℃. On the basis of the cell's electrolytic characteristics, the scale of a combined ACRES CO2 electrolysis/iron-making facility was estimated.