Optimization and modelling of the preparation of activated carbons from neem (Azadirachta Indica A. Juss) seed hulls based on Response Surface Methodology (RSM)
Author Affiliations
- 1Université Cheikh Anta Diop (UCAD), Ecole Supérieure Polytechnique (ESP), Laboratoire Eau, Energie, Environnement et Procédés Industriels (LE3PI), B.P. 5085 Dakar-Fann, Sénégal
- 2Université Cheikh Anta Diop (UCAD), Ecole Supérieure Polytechnique (ESP), Laboratoire Eau, Energie, Environnement et Procédés Industriels (LE3PI), B.P. 5085 Dakar-Fann, Sénégal and Institut National Polytechnique (INP), Ecole Nationale Supérieure des Ingénieurs en Arts Chimiques et Technologiques (ENSIACET), UMR 1010 Laboratoire de Chimie Agro-Industrielle, BP 44362 - 31030 Toulouse Cedex 4, France
- 3Université Cheikh Anta Diop (UCAD), Ecole Supérieure Polytechnique (ESP), Laboratoire Eau, Energie, Environnement et Procédés Industriels (LE3PI), B.P. 5085 Dakar-Fann, Sénégal and Institut National Polytechnique (INP), Ecole Nationale Supérieure des Ingénieurs en Arts Chimiques et Technologiques (ENSIACET), UMR 1010 Laboratoire de Chimie Agro-Industrielle, BP 44362 - 31030 Toulouse Cedex 4, France and Université du Sine Saloum El Hadji Ibrahima Niass (USSEIN), UFR/ Sciences Fondamentales et de l’Ingénieur, BP 55 Kaolack, Sénégal
- 4Université Cheikh Anta Diop (UCAD), Ecole Supérieure Polytechnique (ESP), Laboratoire Eau, Energie, Environnement et Procédés Industriels (LE3PI), B.P. 5085 Dakar-Fann, Sénégal and Université Amadou Mahtar Mbow, B.P. 45 927 Dakar-Nafa-VDN, Villa N°4334, Amitié 3, Dakar, Sénégal
Res. J. Material Sci., Volume 11, Issue (1), Pages 6-16, February,16 (2023)
Abstract
The activated carbons have been elaborated from neem seed hulls by chemical process using H3PO4 as the activating agent. The effects of impregnation ratio, temperature and pyrolysis time on yield, methylene blue and iodine values were studied. The Response Surface Methodology (RSM) was used for process optimization and modelling. The influence of the parameters was studied by analysis of variance (ANOVA) method to determine significant (items) factors. The common optimum conditions to produce an activated carbons determined using the desirability function of the design Expert 11 software, correspond to an impregnation ratio of 3, at a pyrolysis temperature of 527.81°C for 1h. The optimal conditions resulted in 63.13% yield of activated carbon with methylene blue and iodine values of 39.20mg.g-1and 788.24 mg.g-1 respectively. The ANOVA showed that temperature was the most effluent factor on pyrolysis yield while the impregnation ratio was the most influential factor on methylene blue and iodine adsorption capacity.
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