Combustion of raw and densified Tunisian oleic by-products in a fixed bed reactor

FUEL

卷:277

Article

Mami, Mohamed Ali¹  Lajili, Marzouk¹  Khiari, Besma²  Jeguirim, Mejdi³ 

[1] Univ Monastir, RU EMIR Study Ionized & React Media, 15 Ave Ibn El Jazar IPEIM, Monastir 5019, Tunisia

[2] Ctr Water Res & Technol CERTE, Lab Wastewaters & Environm, Technopk Borj Cedria,Tourist Rd Soliman,BP 273, Tunis 8020, Tunisia

[3] Univ Strasbourg, Univ Haute Alsace, Inst Sci Mat Mulhouse, 3 Bis,Rue Alfred Werner, F-68093 Mulhouse, France

关键词: Olive Residues;    Sawdust;    Pellets;    Fixed bed reactor;    Combustion characteristics;    Gaseous emissions;   

DOI  :  10.1016/j.fuel.2020.118181

来源: Elsevier

【 摘 要 】

Combustion of biofuels prepared by blending or not olive mill solid residues (olive pomace and olive pits) with pine sawdust (S) and wood chips (WC) was investigated. The mass loss, the bed temperature and the front reaction position were determined. Combustion characteristic numbers such as heating release (HR) and ignition rate (IR), mass conversion rate (MCR) and excess air coefficient (lambda) were also determined. Gaseous emissions of main species (O-2, CO2, CO, H2O, and C-organic were analyzed and measured in the freeboard zone of the reactor. Moreover, the NOx (N2O + NO) and SO2 emission profiles were drawn in the post-combustion chamber. All results were mainly compared to our previous works that dealt with other blends and pellets of olive wastes, but also with biofuels tested by other researchers in similar conditions. Main results exhibit a substantial decrease of the ash content when blending with pine sawdust. Temperature profiles show an increase from the ambient value to a maximum value ranging between 800 and 1075 degrees C in accordance with what is usually found in literature when using biomass solid biofuels. In all samples, concentrations of pollutants such as NOx were also notably reduced and were found to be acceptable regarding the European standards. Furthermore, the combustion of pellets made of 50%-50% mixture of pits and of pomace with sawdust leads to a more efficient and homogenous combustion.

【 授权许可】

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