000107394 001__ 107394
000107394 005__ 20230519145354.0
000107394 0247_ $$2doi$$a10.1016/j.fuel.2020.119218
000107394 0248_ $$2sideral$$a120181
000107394 037__ $$aART-2021-120181
000107394 041__ $$aeng
000107394 100__ $$aEscudero, Ana I.$$uUniversidad de Zaragoza
000107394 245__ $$aOxy-steam combustion: The effect of coal rank and steam concentration on combustion characteristics
000107394 260__ $$c2021
000107394 5060_ $$aAccess copy available to the general public$$fUnrestricted
000107394 5203_ $$aThis paper addresses the experimental investigation of coal combustion characteristics (ignition, burnout and NO formation) under oxy-steam combustion conditions. Two coals are selected in order to compare the effect of the rank: bituminous and sub-bituminous ones. The experiments have been conducted in an electrically-heated entrained flow reactor for a set of O2/N2, O2/CO2 and O2/H2O/CO2 atmospheres, with O2 concentrations up to 35% and H2O concentrations up to 40%. Regarding ignition, 10% H2O reduces ignition temperature (max. 16–19 K) but the trend is reversed when supplying additional steam to 25% and 40%. This behaviour is similar for both coals, with slight larger variations in the case of the low rank coal. Burnout degree of the sub-bituminous coal is barely affected by the steam concentration since all observed conversions are very high. Larger increments (up to 6.1 percentage points) are obtained for the bituminous coal, with a maximum burnout degree for the 25/35% H2O/O2 atmosphere. A very different effect of steam on NO formation is found depending on the coal rank. Significant reduction rates are observed for the bituminous coal in comparison to the dry O2/CO2 atmospheres, with a maximum diminution of 24% when 40% H2O replaces CO2. On the contrary, the higher volatile content in the sub-bituminous coal leads to NO increments up to 9%. For all the combustion characteristics studied, the increase of O2 concentrations attenuates the effects caused by the steam addition.
000107394 536__ $$9info:eu-repo/grantAgreement/ES/MICIU/ENE2015-67448$$9info:eu-repo/grantAgreement/ES/MICIU/RTI2018-094488-B-C21$$9info:eu-repo/grantAgreement/ES/MICIU/RTI2018-094488-B-C22$$9info:eu-repo/grantAgreement/ES/MINECO/BES-2016-078573
000107394 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000107394 590__ $$a8.035$$b2021
000107394 592__ $$a1.514$$b2021
000107394 594__ $$a11.2$$b2021
000107394 591__ $$aENGINEERING, CHEMICAL$$b19 / 143 = 0.133$$c2021$$dQ1$$eT1
000107394 591__ $$aENERGY & FUELS$$b29 / 119 = 0.244$$c2021$$dQ1$$eT1
000107394 593__ $$aEnergy Engineering and Power Technology$$c2021$$dQ1
000107394 593__ $$aOrganic Chemistry$$c2021$$dQ1
000107394 593__ $$aChemical Engineering (miscellaneous)$$c2021$$dQ1
000107394 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000107394 700__ $$aAznar, María
000107394 700__ $$0(orcid)0000-0003-4304-6685$$aDíez, Luis I.$$uUniversidad de Zaragoza
000107394 7102_ $$15004$$2590$$aUniversidad de Zaragoza$$bDpto. Ingeniería Mecánica$$cÁrea Máquinas y Motores Térmi.
000107394 773__ $$g285 (2021), 119218 [9 pp.]$$pFuel$$tFuel$$x0016-2361
000107394 8564_ $$s989945$$uhttps://zaguan.unizar.es/record/107394/files/texto_completo.pdf$$yPostprint
000107394 8564_ $$s1651116$$uhttps://zaguan.unizar.es/record/107394/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000107394 909CO $$ooai:zaguan.unizar.es:107394$$particulos$$pdriver
000107394 951__ $$a2023-05-18-13:29:46
000107394 980__ $$aARTICLE