From agriculture residue to upgraded product: the thermochemical conversion of sugarcane bagasse for fuel and chemical products

Abstract:

A holistic investigation considering the sugarcane bagasse characterization, fast pyrolysis and upgrading of bio-oil applying two nickel-based catalysts is presented. The bio-oil composition is correlated to the bagasse building blocks, and the hydrotreatment reaction pathways are identified. Despite the high ash content of 6.75 wt%, 60.1 wt% of bio-oil was obtained by fast pyrolysis, attributed to low concentration of potassium (0.08 wt%) and low humidity (2.80 wt%) observed in the bagasse. Upgraded bio-oil with 60.3% less water and 43.3% less oxygen were obtained with Ni/SiO2, resulting in an HHV 63% higher compared to bagasse. Ni-Cr/SiO2 showed the highest hydrogenation activity and the highest conversion of acids, converting 25.7% of acetic acid and 14.95% of propionic acid while Ni/SiO2 was more active for conversion of compounds containing aromatic groups. The higher viscosity of upgraded oils in comparison to the fast pyrolysis bio-oil indicates that the stabilization during the heating ramp can be improved to suppress polymerization. Hence, sugarcane bagasse is an attractive feedstock with an overall final yield of 30.5 wt% of the upgraded product.


Reference:
SCHMITT, Caroline Carriel; MOREIRA, Renata; NEVES, Renato Cruz; RICHTER, Daniel; FUNKE, Axel; RAFFELT, Klaus; GRUNWALDT, Jan-Dierk; DAHMEN, Nicolaus. From agriculture residue to upgraded product: the thermochemical conversion of sugarcane bagasse for fuel and chemical products. Fuel Processing Technology, v.197, 106199, Jan., 2020.

Acesso ao artigo no site do Periódico:
https://www.sciencedirect.com/science/article/pii/S0378382019311567

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