000118047 001__ 118047
000118047 005__ 20220824113020.0
000118047 0247_ $$2doi$$a10.12688/openreseurope.14275.1
000118047 0248_ $$2sideral$$a129512
000118047 037__ $$aART-2021-129512
000118047 041__ $$aeng
000118047 100__ $$0(orcid)0000-0002-9174-9820$$aBailera, Manuel$$uUniversidad de Zaragoza
000118047 245__ $$aRevisiting the Rist diagram for predicting operating conditions in blast furnaces with multiple injections
000118047 260__ $$c2021
000118047 5060_ $$aAccess copy available to the general public$$fUnrestricted
000118047 5203_ $$aBackground: The Rist diagram is useful for predicting changes in blast furnaces when the operating conditions are modified. In this paper, we revisit this methodology to provide a general model with additions and corrections. The reason for this is to study a new concept proposal that combines oxygen blast furnaces with Power to Gas technology. The latter produces synthetic methane by using renewable electricity and CO2 to partly replace the fossil input in the blast furnace. Carbon is thus continuously recycled in a closed loop and geological storage is avoided. Methods: The new model is validated with three data sets corresponding to (1) an air-blown blast furnace without auxiliary injections, (2) an air-blown blast furnace with pulverized coal injection and (3) an oxygen blast furnace with top gas recycling and pulverized coal injection. The error is below 8% in all cases. Results: Assuming a 280 tHM/h oxygen blast furnace that produces 1154 kgCO2/tHM, we can reduce the CO2 emissions between 6.1% and 7.4% by coupling a 150 MW Power to Gas plant. This produces 21.8 kg/tHM of synthetic methane that replaces 22.8 kg/tHM of coke or 30.2 kg/tHM of coal. The gross energy penalization of the CO2 avoidance is 27.1 MJ/kgCO2 when coke is replaced and 22.4 MJ/kgCO2 when coal is replaced. Considering the energy content of the saved fossil fuel, and the electricity no longer consumed in the air separation unit thanks to the O2 coming from the electrolyzer, the net energy penalizations are 23.1 MJ/kgCO2 and 17.9 MJ/kgCO2, respectively. Discussion: The proposed integration has energy penalizations greater than conventional amine carbon capture (typically 3.7 – 4.8 MJ/kgCO2), but in return it could reduce the economic costs thanks to diminishing the coke/coal consumption, reducing the electricity consumption in the air separation unit, and eliminating the requirement of geological storage.
000118047 536__ $$9info:eu-repo/grantAgreement/EC/H2020/887077/EU/Decarbonisation of carbon-intensive industries (Iron and Steel Industries) through Power to gas and Oxy-fuel combustion/DISIPO$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 887077-DISIPO
000118047 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000118047 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000118047 700__ $$aNakagaki, Takao
000118047 700__ $$aKataoka, Ryoma
000118047 7102_ $$15004$$2590$$aUniversidad de Zaragoza$$bDpto. Ingeniería Mecánica$$cÁrea Máquinas y Motores Térmi.
000118047 773__ $$g1 (2021), 141 [37 pp.]$$tOpen Research Europe$$x2732-5121
000118047 8564_ $$s3031217$$uhttps://zaguan.unizar.es/record/118047/files/texto_completo.pdf$$yVersión publicada
000118047 8564_ $$s3119796$$uhttps://zaguan.unizar.es/record/118047/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000118047 909CO $$ooai:zaguan.unizar.es:118047$$particulos$$pdriver
000118047 951__ $$a2022-08-24-09:50:37
000118047 980__ $$aARTICLE