000133108 001__ 133108
000133108 005__ 20241003092217.0
000133108 0247_ $$2doi$$a10.1016/j.fuel.2024.131265
000133108 0248_ $$2sideral$$a137816
000133108 037__ $$aART-2024-137816
000133108 041__ $$aeng
000133108 100__ $$0(orcid)0000-0003-4304-6685$$aDíez, Luis I.$$uUniversidad de Zaragoza
000133108 245__ $$aOn the oxy-combustion of blends of coal and agro-waste biomass under dry and wet conditions
000133108 260__ $$c2024
000133108 5060_ $$aAccess copy available to the general public$$fUnrestricted
000133108 5203_ $$aIntegrating bioenergy into carbon capture and storage systems (Bio-CCS) is a novel concept aiming at reducing CO emissions, pointing to a short-term need to increase the use of non-conventional biomasses. The main objective of this experimental research is to characterize the behavior of two agro-waste biomasses under oxy-co-firing conditions, as concerns fuel conversion and NO formation, compared to the use of typical raw pine wood. The effect of replacing CO with HO in the firing atmosphere is also sought. Two different biomass shares in the blends, 20 % and 50 %, are selected. The experiments are conducted in a lab-scale entrained flow reactor for two O concentrations (21 % and 35 %) and four HO concentrations (0 %, 10 %, 25 %, 40 %). Some operating conditions are kept the same to enable the comparisons: mean residence time (3 s), initial reactor temperature (1000 °C) and oxygen excess (1.25). New results have been obtained from the experiments, optimizing burnout degrees and reducing NO levels. Minimum differences in conversions are detected for the 35 % O cases when the agro-biomasses replace the pine wood: less than 0.7 and 1.1 percentage points. Burnout degrees are maximized when 25 % CO is replaced with HO in most cases, with maximum values in the range 97.3–97.7 %. The higher the agro-biomasses share in the blend, the higher the N-fuel to NO conversion, consistent with their larger nitrogen contents. Significant decreases of NO are detected when CO is replaced with HO, with maximum reductions of 17.6 %. The extent of these NO reductions shows a clear dependence on the volatiles-to-char ratios for the fired blends: the higher the ratio, the lower the decrease. For the largest steam additions (40 %), the NO depleting effect caused by HO is partially compensated with the enhancement of the N-volatiles oxidation, limiting the NO reductions to 1.7–7.3 % compared to the dry atmospheres.
000133108 536__ $$9info:eu-repo/grantAgreement/ES/MICINN/RTI2018-094488
000133108 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc$$uhttp://creativecommons.org/licenses/by-nc/3.0/es/
000133108 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000133108 700__ $$0(orcid)0000-0003-2484-2504$$aGarcía-Mariaca, Alexander$$uUniversidad de Zaragoza
000133108 700__ $$0(orcid)0000-0002-6103-7136$$aLlera-Sastresa, Eva$$uUniversidad de Zaragoza
000133108 700__ $$0(orcid)0000-0002-5037-7047$$aCanalís, Paula$$uUniversidad de Zaragoza
000133108 7102_ $$15004$$2545$$aUniversidad de Zaragoza$$bDpto. Ingeniería Mecánica$$cÁrea Ingeniería Mecánica
000133108 7102_ $$15004$$2590$$aUniversidad de Zaragoza$$bDpto. Ingeniería Mecánica$$cÁrea Máquinas y Motores Térmi.
000133108 773__ $$g365 (2024), 131265 [11 pp.]$$pFuel$$tFuel$$x0016-2361
000133108 8564_ $$s1111158$$uhttps://zaguan.unizar.es/record/133108/files/texto_completo.pdf$$yVersión publicada
000133108 8564_ $$s2473347$$uhttps://zaguan.unizar.es/record/133108/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000133108 909CO $$ooai:zaguan.unizar.es:133108$$particulos$$pdriver
000133108 951__ $$a2024-10-03-09:20:47
000133108 980__ $$aARTICLE