Recovery of clean energy precursors from Bambara groundnut waste via pyrolysis: Kinetics, products distribution and optimisation using response surface methodology

Mohammed, Isah Yakub and Abakr, Yousif Abdalla and Hui, Jershen Nga Xing and Alaba, Peter Adeniyi and Morris, Kenobi Isima and Ibrahim, Mustapha Danladi (2017) Recovery of clean energy precursors from Bambara groundnut waste via pyrolysis: Kinetics, products distribution and optimisation using response surface methodology. Journal of Cleaner Production, 164. pp. 1430-1445.

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Abstract

This study presents first comprehensive thermochemical analysis of Bambara groundnut shell. Pyrolysis characteristics was examined under non-isothermal degradation in nitrogen atmosphere at different heating rates (10, 15 and 20 �C/min) using single-step global model kinetic model. The single-step global model average apparent activation energy was found to be 142.64 ± 5.7 kJ/mol. Pyrolysis was conducted in a fixed bed reactor. Effects of pyrolysis temperature (450e750 �C), heating rate (20e50 �C/min) and nitrogen flow rate (5e25 L/min) were investigated collectively. The process variables were optimized using response surface methodology with central composite design. Optimum bio-oil yield of 36.49 wt% was recorded at 600 �C, 50 �C/min and 11 L/min. The bio-oil, bio-char and non-condensable gas collected were comprehensively characterised. Energy analysis of the products was also evaluated. This study revealed that Bambara groundnut shell, a residue from food crop, is a potential source of energy precursors for development of a sustainable bioenergy system and biomaterials

Item Type:	Article
Uncontrolled Keywords:	Thermogravimetric analysis Pyrolysis Bambara groundnut shell Energy analysis Kinetic study
Subjects:	T Technology > TP Chemical technology
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Mrs Patricia Nwokealisi
Date Deposited:	21 Aug 2018 12:39
Last Modified:	21 Aug 2018 12:39
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/11411

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