Valorisation des coques d’anacarde par pyrolyse au Bénin

Abstract : Faced to difficulties to energy access and management of waste from the processing of cashew nuts in Benin, the shells stored in cashew nuts processing plants are directly used as fuel. They are therefore burned in kilns to provide the energy required to produce the heat for embrittlement of nuts, steaming and drying almonds. This non controlled combustion generates significant pollution because CNSL, substance contained in the shells, produces abundant and acrid smoke irritating to eyes. To overcome this problem, we have constructed in Benin two pyrolysis plants on the basis of a reactor designed by CEFREPADE and RON-GEAD. Those reactors have been used in Benin for energy recovery from cashew nut shells. This experiment of promotion of cashew nuts showed that the pyrolysis reactor used can be able to produce gaseous energy of approximately 82% of the hull mass processed and produces about 18% of charcoal. Furthermore, on the energy point of view, the recovered gas corresponds to 74% of the energy of the raw material, while the obtained charcoal (18% of raw material) corresponds to 26% of total energy of fed raw material.
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Thierry Godjo, Jean-Philippe Tagutchou, Pascale Naquin, Rémy Gourdon. Valorisation des coques d’anacarde par pyrolyse au Bénin. Déchets, Sciences et Techniques, 2015, pp.11-18. ⟨10.4267/dechets-sciences-techniques.3282⟩. ⟨hal-01949004⟩

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