2019-11-12T10:26:09Z http://digital.csic.es/dspace-oai/request
oai:digital.csic.es:10261/183889 2019-09-04T09:48:03Z com_10261_35 com_10261_5 com_10261_84 col_10261_288 col_10261_337
Martínez Berges, Isabel Fernández García, José Ramón Abanades García, Juan Carlos Romano, M. C. 2019-06-12T12:04:11Z 2019-06-12T12:04:11Z 2018-08-28 Energy 163: 570-584 (2018) http://hdl.handle.net/10261/183889 http://dx.doi.org/10.13039/501100000780 An integrated full system to decarbonise a steelworks plant is discussed, using high temperature Ca–Cu chemical looping reactions. A H2-enriched gas is produced through sorption enhanced water-gas-shift (SEWGS) of blast furnace gas (BFG) using a CaO-based CO2 sorbent. The resulting CaCO3 is regenerated with heat from CuO reduction with N2-free steel mill off-gases. The high temperature operation allows for an effective integration of a power steam cycle that replaces the steel mill power plant. The proposed fluidised-bed process facilitates a solids segregation step to separate the O2 solid carrier from the CO2 sorbent. The CaO-rich stream separated could be used in the steelmaking process thereby removing the lime plant. Balances of a steel mill integrated with the Ca–Cu process are solved and compared with those obtained for a reference steelworks plant with post-combustion CO2 capture through amine absorption. Using exclusively steel mill off-gases in the Ca–Cu process can reduce CO2 emissions by 30%. Moreover, the H2-gas could produce about 10% of additional iron through a Direct Reduced Iron process. In contrast, by adding natural gas for CuO reduction, almost all the BFG can be decarbonised and an overall CO2 capture efficiency in the steel plant of 92% can be achieved. eng embargoedAccess Blast furnace gas Calcium Looping CuO/Cu Looping CO2 capture Steelworks Integration of a fluidised bed Ca–Cu chemical looping process in a steel mill artículo