[ Densification et analyse des propriétés physiques de biocharbon produit à partir des coques déchets d’anacarde au Bénin ]
Volume 19, Issue 3, February 2017, Pages 614–620
Thierry Godjo1
1 Département de Génie Industriel et Mécanique, Institut Universitaire de Technologie de Lokossa, B.P. 133, Lokossa, Benin
Original language: French
Copyright © 2017 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
To overcome the problem of access to energy in Benin, some researches have been carried out on the production of energy from cashew shells. Thus, two pyrolysis plants on the basis of a reactor designed by CEFREPADE and RONGEAD have been constructed in Benin. Those reactors have been used in Benin for energy recovery from cashew nut shells. Although the pyrolysis products reduce the waste deposit and provide the energy needed for combustion, the exploitation of biochars remains incomplete: they are bulky and difficult to transport because of their low density. To help operators to better manage and facilitate the transport of biocharbons, new research was conducted to densify these biochars. A manual lever press with at lower pressure of 1.80 bar has been developed. Analysis of physical and mechanical properties showed that degree of densification, impact resistance of briquettes and resistance to water penetration were respectively 81%, 90% and 0.94. Also, the effect pressure on density of briquettes and the influence of the drying time on the masses of briquettes were determined. The high rate of densification make that the biocharbons of cashew shells were less bulky and more portable.
Author Keywords: Densification, Biomass, cashew shell, biochar, Lever press, Briquettes, Benin.
Volume 19, Issue 3, February 2017, Pages 614–620
Thierry Godjo1
1 Département de Génie Industriel et Mécanique, Institut Universitaire de Technologie de Lokossa, B.P. 133, Lokossa, Benin
Original language: French
Copyright © 2017 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
To overcome the problem of access to energy in Benin, some researches have been carried out on the production of energy from cashew shells. Thus, two pyrolysis plants on the basis of a reactor designed by CEFREPADE and RONGEAD have been constructed in Benin. Those reactors have been used in Benin for energy recovery from cashew nut shells. Although the pyrolysis products reduce the waste deposit and provide the energy needed for combustion, the exploitation of biochars remains incomplete: they are bulky and difficult to transport because of their low density. To help operators to better manage and facilitate the transport of biocharbons, new research was conducted to densify these biochars. A manual lever press with at lower pressure of 1.80 bar has been developed. Analysis of physical and mechanical properties showed that degree of densification, impact resistance of briquettes and resistance to water penetration were respectively 81%, 90% and 0.94. Also, the effect pressure on density of briquettes and the influence of the drying time on the masses of briquettes were determined. The high rate of densification make that the biocharbons of cashew shells were less bulky and more portable.
Author Keywords: Densification, Biomass, cashew shell, biochar, Lever press, Briquettes, Benin.
Abstract: (french)
Pour pallier le problème d’accès à l’énergie au Bénin, des recherches ont été menées sur la production d’énergie à partir des coques d’anacarde. Ainsi, deux installations de pyrolyse sur la base du modèle de réacteur conçu par CEFREPADE et RONGEAD ont été construites et permettent aujourd’hui la valorisation des coques déchets d’anacarde en gaz et biocharbon. Si les produits de pyrolyse permettent de réduire le gisement de déchets, de fournir l’énergie nécessaire pour la combustion et d’améliorer l’empreinte environnementale, l’exploitation des biocharbons reste cependant incomplète : ils sont encombrants et difficiles à transporter à cause de leur faible densité. Pour aider les opérateurs à mieux gérer et faciliter le transport des biocharbons, une nouvelle recherche a été menée afin de densifier ces biocharbons. Une presse manuelle à levier ayant une pression de 1,80 bar a pu être mise au point. Les résultats des analyses des propriétés physiques et mécaniques des briquettes ont montré que le taux moyen de densification est 81 %, la résistance au choc 90 % et la résistance à la pénétration d’eau 85%. La densité optimale de la briquette est 0,94. Ces analyses ont par ailleurs montré l’influence de la variation de la pression sur la densité des briquettes et celle de la durée de séchage sur les masses des briquettes. Le taux élevé de densification fait des biocharbons moins encombrants et mieux transportable.
Author Keywords: Densification, Biomasse, Coque d’anacarde, Biocharbon, Presse à levier, Briquette, Bénin.
How to Cite this Article
Thierry Godjo, “Densification and analysis of the physical properties of bio-coal produced from the pyrolysis cashew nut shells in Benin,” International Journal of Innovation and Applied Studies, vol. 19, no. 3, pp. 614–620, February 2017.
