Research Laboratory for Nuclear Reactors, Associate Professor
Y. Kato, Hydrogen Utilization for Carbon Recycling Iron Making System, ISIJ International, 52(8), pp. 1433–1438. (2012). DOI: http://dx.doi.org/10.2355/isijinternational.52.1433
A new energy transformation concept based on carbon recycling, called as Active Carbon Recycling Energy System, ACRES, was proposed for a zero carbon dioxide emission process. The ACRES is driven availably by carbon dioxide free primary energy. High temperature gas cooled reactor (HTGR) is a candidate of the energy sources for ACRES. A smart ironmaking system with ACRES (iACRES) is one of application examples. The contribution of HTGR on iACRES was discussed thermodynamically in this study.
A carbon material is re-used cyclically as energy carrier media in ACRES. Carbon monoxide (CO) had higher energy densities than hydrogen and was compatible with conventional process. Thus, CO was suitable recycling media for ACRES. Efficient regeneration of CO was a key technology for ACRES. CO2 direct electrolysis was one of the candidates. HTGR was appropriate heat source for both water and CO2 electrolysises, and CO2 hydrogen reduction. One or two plants of HTGR are corresponding with iACRES system for one unit of conventional blast furnace. The proposed ACRES system with HTGR was expected to form the basis of a new energy industrial process that had low CO2 emission.
Carbon recycling, low carbon, high temperature gas reactor, carbon dioxide, carbon monoxide