Characterization of Some Co-Fired Agricultural by-products for Energetic Use

Authors

  • Ana Neacsu Institute of Physical Chemistry Ilie Murgulescu
  • Daniela Gheorghe Institute of Physical Chemistry, "Ilie Murgulescu”

DOI:

https://doi.org/10.29356/jmcs.v66i4.1739

Keywords:

Cofiring, pellets, agricultural wastes, calorific value, proximate analysis

Abstract

Abstract. The aim of the present study is obtaining the calorific values and the qualitative properties of the pellets made from four agricultural by-products co-fired with coal and non-cofired, in order to highlight the importance of co-fired biomass as alternative energy source. The studied samples are coarse ground grist of sorghum seeds, rape seeds, soyabean, sunflower seeds and their mixture with coal. The following parameters are calculated: higher heating values, bulk densities, energy densities, fuel value index, nitrogen and sulphur content. The proximate composition as defined by ASTM was established: moisture, ash, volatile matter, and fixed carbon. The moisture and ash content of the studied agricultural by-products are identified as the main factors of calorific influence. The obtained results come to confirm the ability of co-fired biomass to be used as fuel. As resulted from the experimental data, the co-fired biomass of agricultural residues are good resources as biofuel in the form of pellets. Among the studied samples, co-fired sunflower seeds grist presents the highest heating value, highest fixed carbon content and fuel value index, thus being a good alternative to fossil fuel in order to produce energy and reduce the domestic air pollution and the amount of wood needed.

 

Resumen. El objetivo del presente estudio es obtener los valores de poderes caloríficos y las propiedades cualitativas de pellets elaborados a partir de cuatro subproductos agrícolas en co-combustión con carbón y sin co-combustión.  Esto se realizó con la finalidad de resaltar la importancia de la biomasa en co-combustión como fuente de energía alternativa.  Las muestras estudiadas son: molienda gruesa de semillas de sorgo, colza, soja, semillas de girasol y sus mezclas con carbón. Se calcularon los siguientes parámetros: poderes caloríficos superiores, densidades aparentes, densidades energéticas, índice de valor del combustible, contenido de nitrógeno y azufre. Se estableció la composición proximal definida por ASTM: humedad, ceniza, materia volátil y carbón fijo. El contenido de humedad y cenizas de los subproductos agrícolas estudiados se identifican como los principales factores de influencia calorífica. Los resultados obtenidos vienen a confirmar la capacidad de la biomasa de co-combustión para ser utilizada como combustible. Como resultado de los datos experimentales, la biomasa co-quemada de residuos agrícolas es un buen recurso como biocombustible en forma de gránulos. Entre las muestras estudiadas, la molienda de semillas de girasol cocida presenta el valor calorífico más alto, el contenido de carbono fijo y el índice de valor de combustible más altos, por lo que es una buena alternativa al combustible fósil para producir energía y reducir la contaminación del aire doméstico y la cantidad de madera necesaria.

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Published

2022-10-01

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Regular Articles