Effects of Acetic Acid Pretreatment and Pyrolysis Temperatures on Product Recovery from Fijian Sugarcane Bagasse
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ORIGINAL PAPER
Effects of Acetic Acid Pretreatment and Pyrolysis Temperatures on Product Recovery from Fijian Sugarcane Bagasse Viliame Savou1 · Shogo Kumagai1 · Yuko Saito1 · Tomohito Kameda1 · Toshiaki Yoshioka1 Received: 8 April 2019 / Accepted: 21 October 2019 © Springer Nature B.V. 2019
Abstract The utilization and storage of surplus waste bagasse in underdeveloped sugar mills is problematic due to limited space within the sugar factories and pollution from bagasse debris, thus, pyrolysis offers a possible solution for the clearance of factory bagasse wastes. In this study, Fijian sugarcane bagasse was subjected to pyrolysis, and the effects of combined acetic acid (CH3COOH) pretreatment and high temperature on the distribution of gaseous products were investigated. Bagasse wastes delivered from Fiji were pretreated with different concentrations of CH3COOH (1, 3, 6, and 9 mol L−1 (M)) to partially hydrolyze cellulose, hemicellulose, and lignin. The pretreatment disrupted the bagasse cell structures and enhanced bagasse pyrolysis. The gas yield from untreated bagasse at 500 °C (117.7 mL g−1) significantly increased (350.4 mL g−1) with the combination of 1 M CH3COOH pretreatment and thermal cracking at 800 °C. This study will aid the recovery of energy or chemical feedstock from surplus Fijian bagasse, which cannot be otherwise used effectively. Graphic Abstract lignin
bagasse
acid pretreatment
cellulose
pyrolysis 500 °C
hemicellulose
pyrolysates
char
500 / 800 °C
gas
tars
Keywords Biomass pyrolysis · Bagasse · XPS · Acid pretreatment · Hydrolysis · Thermal cracking
Statement of Novelty The pyrolysis of biomass/sugarcane bagasse has been widely investigated by many researchers. This work reports effects of the combination of acid pretreatment and elevated temperature on the pyrolysis of sugarcane bagasse. The acid Electronic supplementary material The online version of this article (https://doi.org/10.1007/s12649-019-00866-9) contains supplementary material, which is available to authorized users. * Shogo Kumagai [email protected] 1
Graduate School of Environmental Studies, Tohoku University, 6‑6‑07 Aoba, Aramaki‑aza, Aoba‑ku, Sendai, Miyagi 980‑8579, Japan
pretreatment is essential for the cleavage of long chain lengths of cellulose and hemicellulose in bagasse, so they are easier to pyrolyze. The use of high temperature is to enhance the gaseous production by the thermal cracking of pyrolysis tars. The tube reactor pyrolysis in this work has two chambers, the pyrolysis chamber heated at 500 °C, which produces volatiles that enter into the second chamber. The temperature of the second chamber is being altered in this work comparing the pyrolysis of pyrolysates at 500 and 800 °C respectively. From this study we conclude that acid pretreatment of bagasse and increased temperature favours the chemical recovery process. This data is useful when determining economically feasible and cost effective methods of converting
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Fiji’s excess sugarcane bagasse wastes
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