A novel battery system combined H2-FeCO3 generation

Abstract

In order to solve the difficult problems of greenhouse effect and energy resource in short supply, developing a battery system utilizing carbon dioxide and ferrous waste has significant potential in buffering the energy crisis, eliminating the consumption of the fossil fuel and reducing air pollution. According to the mechanism of CO2 corrosion of scrap iron and the electrodialysis principle, a novel battery system combined H2-FeCO3 generation is proposed. The system makes CO2 and scrap iron to be used as a resource, and produce green energy hydrogen and electricity. The battery system is made up of graphite electrode, ferrous waste electrode, proton exchange diaphragm, external electric field. The results showed that the adoption of the proton exchange diaphragm and external electric field can accelerate the reaction rate, increase the electromotance and make the capture of H2 and FeCO3 more easily. Ferrous carbonate can be stripped and heated to ferrous oxide and net CO2 which can be utilized circularly. Ferrous oxide is easily oxidized to ferric oxide which is very important industrial raw material. Based on the thermodynamic analysis of the battery system, the thermodynamic efficiency can reach 97% and the electromotance can reach 0.3151V. According to calculation of the economic benefit of this system, the net contribution of the system is RMB 1, 545 and the neat profit rate is 30.91% when one ton of scrap iron is reused.