56122 20201214111111.0 doi 10.1016/j.atmosenv.2016.03.012 sideral 95179 ART-2016-95179 eng (orcid)0000-0001-9240-9644 Jimenez, Santiago Universidad de Zaragoza Size distribution and concentration of soot generated in oil and gasfired residential boilers under different combustion conditions 2016 Access copy available to the general public Unrestricted In spite of the relevance of residential heating burners in the global emission of soot particles to the atmosphere, relatively little information on their properties (concentration, size distribution) is available in the literature, and even less regarding the dependence of those properties on the operating conditions. Instead, the usual procedure to characterize those emissions is to measure the smoke opacity by several methods, among which the blackening of a paper after filtering a fixed amount of gas (Bacharach test) is predominant. In this work, the size distributions of the particles generated in the combustion of a variety of gaseous and liquid fuels in a laboratory facility equipped with commercial burners have been measured with a size classifier coupled to a particle counter in a broad range of operating conditions (air excesses), with simultaneous determination of the Bacharach index. The shape and evolution of the distribution with progressively smaller oxygen concentrations depends essentially on the state of the fuel: whereas the combustion of the gases results in monomodal distributions that ‘shift’ towards larger diameters, in the case of the gas-oils an ultrafine mode is always observed, and a secondary mode of coarse particle grows in relevance. In both cases, there is a strong, exponential correlation between the total mass concentration and the Bacharach opacity index, quite similar for both groups of fuels. The empirical expressions proposed may allow other researchers to at least estimate the emissions of numerous combustion facilities routinely characterized by their smoke opacities. info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio/CSD2010-00011 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 3.629 2016 METEOROLOGY & ATMOSPHERIC SCIENCES 16 / 84 = 0.19 2016 Q1 T1 ENVIRONMENTAL SCIENCES 49 / 229 = 0.214 2016 Q1 T1 1.495 2016 Environmental Science (miscellaneous) 2016 Q1 Atmospheric Science 2016 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion (orcid)0000-0002-0063-1318 Barroso Estébanez, Jorge Angel Universidad de Zaragoza Pina, Antonio (orcid)0000-0003-2863-4681 Ballester, Javier Universidad de Zaragoza 5001 600 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Mecánica de Fluidos 133 (2016), 60-67 Atmos. environ. (1994) Atmospheric Environment 1352-2310 1728985 http://zaguan.unizar.es/record/56122/files/texto_completo.pdf Postprint 90002 http://zaguan.unizar.es/record/56122/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:56122 articulos driver 2020-12-14-11:05:49 ARTICLE