Effect of torrefaction pretreatment on combustion behaviour of different agricultural wastes

Year 2023, Volume: 6 Issue: 4, 340 - 346, 31.12.2023

Neslihan Duranay , Melek Yılgın , Ercan Aydoğmuş

https://doi.org/10.35208/ert.1233807

Abstract

In this study, which was carried out to investigate the effect of the torrefaction process on the combustion behaviour of agricultural wastes, almond hulls and shells, olive seeds and corn stalks were used. The samples, dried in a laboratory atmosphere, were torrified at 300 5ºC for 41 minutes. The change in fuel properties was determined by making proximate analyses of the solid product obtained after the process and compared with the raw sample. The effects of the torrefaction process on the combustion behaviour of agricultural wastes of different structures were investigated by burning the 1 0.15 g weighted raw and torrefied samples at 700ºC furnace initial temperature in a fixed bed system. Biochars containing higher fixed carbon were obtained with the torrefaction process applied to agricultural waste, and it was determined that this caused biochars to burn more efficiently and for a longer time than raw biomass. As a result, it was determined that biochar with better properties was produced by the torrefaction process applied to agricultural wastes and it was suitable for burning in solid fuel combustion systems. Thus, biochar obtained will both contribute to the country's economy and add value to agricultural wastes that cause problems during storage, transportation, loading into the burning system, and combustion.

Keywords

Agricultural waste, torrefaction, combustion, energy recovery

References

• S. E Ibitoye, T. C. Jen, R. M. Mahamood, and E. T. Akinlabi, “Improving the combustion properties of corncob biomass via torrefaction for solid fuel applications,” Journal of Composites Science, Vol. 5(10),Article 260, 2021. [CrossRef]
• X. Chen, H. Zhang, Y. Song, and R. Xiao, “Prediction of product distribution and bio-oil heating value of biomass fast pyrolysis,” Chemical Engineering and Processing-Process Intensification, Vol. 130, pp. 3642, 2018. [CrossRef]
• H. Haykiri-Acma, S. Yaman, S. Kucukbayrak, "Combustion characteristics of torrefied biomass materials to generate power," in 2016 IEEE Smart Energy Grid Engineering (SEGE), pp. 226230,2016. [CrossRef]
• N. D. Duranay, and G. Akkuş, “Solid fuel production with torrefaction from vineyard pruning waste,” Biomass Conversion and Biorefinery, Vol. 11(6), pp. 23352346, 2021. [CrossRef]
• W. H. Chen, J. Peng, and X. T. Bi, “A state-of-the-art review of biomass torrefaction, densification and applications,” Renewable and Sustainable Energy Reviews, Vol. 44, pp. 847866, 2015. [CrossRef]
• R. K. Singh, A. Sarkar, and J. P. Chakraborty, "Effect of torrefaction on the physicochemical properties of eucalyptus derived biofuels: estimation of kinetic parameters and optimizing torrefaction using response surface methodology (RSM)," Energy, Vol. 198, Article 117369, 2020. [CrossRef]
• Y. P. Rago, F. X. Collard, J. F. Görgens, D. Surroop, and R. Mohee, “Torrefaction of biomass and plastic from municipal solid waste streams and their blends: Evaluation of interactive effects,” Fuel, Vol. 277, Article 118089, 2020. [CrossRef]
• A. T. Conag, J. E. R. Villahermosa, L. K. Cabatingan, and A. W. Go, “Energy densification of sugarcane leaves through torrefaction under minimized oxidative atmosphere,” Energy for Sustainable Development, Vol. 42, pp. 160-169, 2018. [CrossRef]
• M. J. Prins, K. J. Ptasinski, and F. J. Janssen, “Torrefaction of wood: Part 1. Weight loss kinetics,” Journal of Analytical and Applied Pyrolysis, Vol. 77(1), pp. 2834, 2006. [CrossRef]
• N. Vorobiev, A. Becker, H. Kruggel-Emden, A. Panahi, Y. A. Levendis, and M. Schiemann, “Particle shape and Stefan flow effects on the burning rate of torrefied biomass,” Fuel, Vol. 210, pp. 107120, 2017. [CrossRef]
• F. S. Akinrinola, N. Ikechukwu, L. I. Darvell, J. M. Jones, and A. Williams, “The potential use of torrefied Nigerian biomass for combustion applications,” Journal of the Energy Institute, Vol. 93(4), pp. 17261736, 2020. [CrossRef]
• M. Yılgın, N. Duranay, and D. Pehlivan, “Torrefaction and combustion behaviour of beech wood pellets,” Journal of Thermal Analysis and Calorimetry, Vol. 138(1), pp. 819826, 2019. [CrossRef]
• J. Riaza, J. Gibbins, and H. Chalmers, “Ignition and combustion of single particles of coal and biomass,” Fuel, Vol. 202, pp. 650-655, 2017. [CrossRef]
• G. Özer, N. And Duranay, "Bağ Budama Atığına Uygulanan İnert ve Oksidatif Torrefaksiyon İşleminin Karşılaştırılması," Fırat Üniversitesi Mühendislik Bilimleri Dergisi, vol. 35(2), pp. 461471, 2023. [Turkish] [CrossRef]
• Y. Niu, Y. Lv, Y. Lei, S. Liu, Y. Liang, and D. Wang, “Biomass torrefaction: properties, applications, challenges, and economy,” Renewable Sustainable Energy Reviews, vol. 115, p. 109395, 2019. [CrossRef]
• W. H. Chen, S. W. Du, C. H. Tsai, and Z. Y. Wang, “Torrefied biomasses in a drop tube furnace to evaluate their utility in blast furnaces,” Bioresource Technology, Vol. 111, pp. 433438, 2012. [CrossRef]