79110 20190709135425.0 doi 10.1016/j.biombioe.2016.11.013 sideral 97523 ART-2017-97523 eng Lupiáñez, Carlos On the oxy-combustion of lignite and corn stover in a lab-scale fluidized bed reactor 2017 Access copy available to the general public Unrestricted This paper addresses an experimental investigation concerning oxy-combustion of coal and biomass in a lab-scale fluidized bed reactor. While co-firing has been widely studied under conventional air conditions, few experiences are available to date for O2/CO2 atmospheres. The research is focused on SO2 and NOx emissions, along with the deposition rates and ashes mineralogy. The influences of the atmosphere (air vs. 30/70% O2/CO2), the coal-to-biomass energy input ratio (80/20%, 90/10%), the chlorine mass fraction in the biomass (0.35%, 1%, 2%) and the Ca:S mole ratio (2.5, 4) are reported and discussed in the paper, for two specific fuels: high sulfur lignite and high chlorine corn stover. Concerning SO2 emissions a correlation among the sulfur and the chlorine contents is clearly detected, being affected by the direct desulfurization mechanism occurring under oxy-firing conditions. The single effect of the chlorine content is found to be almost 1.5% of the desulfurization efficiency. NOx emissions are otherwise more dependent on oxygen excess and CO concentration in the reactor, rather than the fuel share or the chlorine supplied. Thick deposition is only detected when chlorine content in the corn is 2%. Potassium aluminosilication is found to be enhanced in comparison to potassium sulfation under oxy-firing, especially for the highest Ca:S mole ratio: observed aluminosilication is five times higher when Ca:S ratio is increased from 2.5 to 4. A significant enrichment in iron is also detected for the fly ash composition, with an increase of 30–50% in comparison to air combustion. info:eu-repo/grantAgreement/ES/MINECO/ENE2012-39114 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 3.358 2017 AGRICULTURAL ENGINEERING 3 / 14 = 0.214 2017 Q1 T1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY 45 / 160 = 0.281 2017 Q2 T1 ENERGY & FUELS 36 / 97 = 0.371 2017 Q2 T2 1.235 2017 Agronomy and Crop Science 2017 Q1 Waste Management and Disposal 2017 Q1 Renewable Energy, Sustainability and the Environment 2017 Q1 Forestry 2017 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Mayoral, M. Carmen (orcid)0000-0003-4304-6685 Díez, Luis I. Universidad de Zaragoza Pueyo, Eloy Espatolero, Sergio (orcid)0000-0002-8609-7389 Andrés, J. Manuel 5004 590 Universidad de Zaragoza Dpto. Ingeniería Mecánica Área Máquinas y Motores Térmi. 96 (2017), 152-161 [26 p.] Biomass bioenergy BIOMASS & BIOENERGY 0961-9534 929848 http://zaguan.unizar.es/record/79110/files/texto_completo.pdf Postprint 74834 http://zaguan.unizar.es/record/79110/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:79110 articulos driver 2019-07-09-11:29:10 ARTICLE