New techniques developed to quantify the impurities of olive stone as solid biofuel

Jesús Mata Sánchez, Jose Antonio Pérez Jiménez, Manuel Jesús Díaz Villanueva, Antonio Serrano, Nieves Núñez and Jesús López Giménez

Renewable Energy, 2015, vol. 78, issue C, 566-572

Abstract: Solid biofuels lead towards the replacement of fossil fuels. The olive industry offers potential for biomass production because of the waste generated in olive groves and olive oil industries. Fines and pulp are two substantial components of the olive stone with negative characteristics for combustion processes. Therefore, the main objective of this study is to develop an analytical method to separate olive pulp contained in an olive stone sample and to quantify it at laboratory scale. Thus, fines and pulp have been characterized. Knowing their physicochemical properties, a new separation methodology has been tested to quantify these fractions. Then, a feasibility study of Near-infrared (NIR) spectroscopy in combination with multivariate data analysis has been implemented to check if olive pulp content fraction could be controlled by using this fast technique. On the one hand, the new methodology based on differences in density of the impurities has achieved excellent results. On the other hand, the feasibility study of NIR spectroscopy applied to this analysis has been performed with good results. R2 of 0.867 for olive stone fraction and 0.908 for olive pulp fraction respectively show the possibility of using this technique as routine analysis.

Keywords: Olive residues; Olive stone; Olive pulp; Fines; Cleaning; Near infrared spectroscopy (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:78:y:2015:i:c:p:566-572

DOI: 10.1016/j.renene.2015.01.049

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