Torrefaction of Empty Fruit Bunch as Fibrous Biomass Pre-Treatment

Abstract:

The utilization of empty bunches (EFB) as biomass still limited. EFB is used as additional fuel in palm oil mills where the combustion process is directly used. This process has deficiencies due to the characteristics of empty bunches which tend to have high water content. To achieve good combustion results, EFB required pre-treatment technique. In this study, experimental studies of EFB pre-treatment is proposed by torrefaction to improve EFB energy quality. Torrefaction of EFB is performed in several temperature variations with a range between 150-300 °C (150,200,250,300) and a certain duration (15,20,25,30,45 minutes). An investigation is done by using a calorimetric bomb, proximate analysis to find the moisture and ash content and ultimate analysis, which determined the chemical properties of the pre-treatment process. The physical properties of EFB, which fibrous and tough makes EFB size reduction difficult to reach homogenous state. Mass yield of torrefied EFB decreased with increasing temperature as well as with increasing times of torrefaction. Fundamentally, the study has highlighted the effects of torrefaction on solid fuel properties of EFB and its potential as a solid fuel for future thermal applications.

• Periodical: Materials Science Forum (Volume 964)
• Pages: 151-155
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.964.151
• Online since: July 2019
• Authors: Endah Laksmi Nugraha*, Ridho Hantoro
• Keywords: EFB, Fibrous Biomass, Pre-Treatment, Torrefaction

References

[1] USDA, World Agricultural Production,, Circ. Ser. May 2014, p.1–29, (2017).

[2] Bambang, Statistik Perkebunan Indonesia 2015 -2017 Kelapa Sawit,, Sawit, p.81, (2017).

[3] B. N. Madanayake, S. Gan, C. Eastwick, and H. K. Ng, Biomass as an energy source in coal co-firing and its feasibility enhancement via pre-treatment techniques,, Fuel Process. Technol., vol. 159, p.287–305, (2017).

DOI: 10.1016/j.fuproc.2017.01.029

[4] J. Koppejan, S. Sokhansanj, S. Melin, and S. Madrali, Status overview of torrefaction technologies,, IEA Bioenergy Task 32, no. December, p.1–54, (2012).

[5] O. Energi, BPPT- Outlook Energi Indonesia 2017. (2017).

[6] J. J. Chew and V. Doshi, Recent advances in biomass pretreatment - Torrefaction fundamentals and technology,, Renew. Sustain. Energy Rev., vol. 15, no. 8, p.4212–4222, (2011).

DOI: 10.1016/j.rser.2011.09.017

[7] Sjaak van Loo and Jaap Koppejan. p., Ed., The Handbook of Biomass Combustion and Co-firing. Earthscan, (2008).