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Evolution of chars during slow pyrolysis of citrus waste

Volpe, R, Bermúdez Menendez, JM, Ramirez Reina, Tomas, Messineo, A and Millan, M (2017) Evolution of chars during slow pyrolysis of citrus waste Fuel Processing Technology, 158. pp. 255-263.

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Conversion of agro-wastes into energy can be key to a circular-driven economy that could lead tomodels for sustainable production. Thermochemical processing is an interesting alternative for the upgrading of agro-wastes to energy. However, owing to the complex and largely unknown set of reactions occurring during thermal breakdown, to ensuring consistent quality of the final products is still a goal to achieve at industrial level. The present study investigates the evolution of solid products of pyrolysis, to gain some insights in these complexities. Chars derived fromslowpyrolysis (200–650 °C) of citrus pulp in a horizontal reactor have been characterized bymeans of Fourier Transform Infrared spectroscopy (FT-IR), X-Ray Diffraction (XRD), ThermoGravimetric Analysis (TGA) and Scanning Electron Microscopy (SEM). Results are discussed also in light of similarities with coal thermal breakdown. At temperatures below 300 °C, changes in solid matrix are mainly due to breaking of aliphatic compounds. Significant changes in char structure and behavior then occur between 300 °C and 500 °C mainly related to secondary char-tar reactions. Above 500 °C, changes appear to occur mainly due to recombination reactions within matrix, which thereby becomes progressively less reactive.

Item Type: Article
Subjects : Chemical & Process Engineering
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
Ramirez Reina,
Date : 19 January 2017
Identification Number : 10.1016/j.fuproc.2017.01.015
Copyright Disclaimer : © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Depositing User : Symplectic Elements
Date Deposited : 01 Feb 2017 14:34
Last Modified : 19 Jan 2018 02:08

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