The effect of torrefaction pre-treatment on the pyrolysis of corn cobs

Results in Engineering

Cedric Briens¹  Miloud Ouadi²  Matt Klaas³  Charles Greenhalf³  Franco Berruti⁴  Andreas Hornung⁴  Hessam Jahangiri⁴ 

[1] Corresponding author.;School of Chemical Engineering, The University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK;Department of Chemical and Biochemical Engineering, Institute for Chemicals and Fuels from Alternative Resources (ICFAR), The University of Western Ontario, London, Ontario N6A 4B9, Canada;School of Chemical Engineering, The University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK;

关键词: Corn cobs;    Pyrolysis;    Torrefaction;    Grinding energy;    Bio-oil;   

DOI  :  

来源: DOAJ

【 摘 要 】

Production of green fuels and chemicals from non-edible corn cob residues presents an excellent opportunity to produce sustainable low carbon energy vectors as an alternative to fossil fuels. The objective of this study was to optimize the fuel physical and chemical properties of torrefied corn cobs bio-oil by investigating the relationship between feedstock pre-treatment (torrefaction) temperatures (240, 260, 280 and 300 ​°C), and subsequent pyrolysis temperatures (400, 450, 500 and 550 ​°C). This experimental methodology aimed to improve both yields and properties of bio-oils from corn cobs. Torrefaction was first carried out as a pre-treatment step using a custom-built torrefaction reactor followed by pyrolysis using a continuous fluidized bed reactor. Torrefaction was found to be a promising pre-treatment step because it had the effect of reducing the water content and viscosity within the bio-oil. Corn cobs grinding energy requirements could be reduced by 69% when torrefaction was applied from 240 ​°C to 260 ​°C. A maximum bio-oil yield of 51.7% was achieved when the optimal temperatures (torrefaction 260 ​°C and pyrolysis 450 ​°C) was applied. Overall, using torrefaction as a pre-treatment step before pyrolysis was shown to be a promising approach for improving some physiochemical properties of bio-oil for its application as a fuel.

【 授权许可】

Unknown