Torrefaction of oil palm mesocarp fiber and their effect on pelletizing

Na, Byeong-Ill; Kim, Younghun; Lim, Woo-Seok; Lee, Soomin; Lee, Hyoung-Woo; Lee, Jaewon

doi:10.1016/j.biombioe.2013.02.041

Cited by 52 publications

(22 citation statements)

References 15 publications

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“…Li et al (2012) reported that the pelletization of the torrefied biomass is more energy intensive than the raw biomass. Due to the lack of the sufficient hydrogen bonds in the torrefied biomass, the pelletization process consumes more compression energy Na et al, 2013;Stelte et al, 2011). The compression energy will increase while pelletizing dried biomass particles.…”

Section: Pelletizationmentioning

confidence: 99%

“…Due to the lack of the hydroxyl groups of moisture and hemicellulose content, the bonds between individual particles in the torrefied pellet are also weaker compared to that for the normal pellets (Na et al, 2013). Shang et al (2012) noted that the strength of pellets from Scot Pine torrefied at 250 °C was significantly reduced, and the pellets are brittle, uneven, and non-uniform in the physical appearance.…”

Section: Pelletizationmentioning

confidence: 99%

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A Comprehensive Review on Biomass Torrefaction

Nhuchhen¹,

Basu²,

Acharya³

2014

IJREB

174

143

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Biomass is a versatile energy resource that could be used as a sustainable energy resource in solid, liquid and gaseous form of energy sources. Torrefaction is an emerging thermal biomass pretreatment method that has an ability to reduce the major limitations of biomass such as heterogeneity, lower bulk density, lower energy density, hygroscopic behavior, and fibrous nature. Torrefaction, aiming to produce high quality solid biomass products, is carried out at 200-300 °C in an inert environment at an atmospheric pressure. The removal of volatiles through different decomposition reactions is the basic principle behind the torrefaction process. Torrefaction upgrades biomass quality and alters the combustion behavior, which can be efficiently used in the co-firing power plant. This paper presents a comprehensive review on torrefaction of biomass and their characteristics. Despite of the number of advantages, torrefaction is motivated mainly for thermochemical conversion process because of its ability to increase hydrophobicity, grindability and energy density of biomass. In addition to this, torrefied biomass could be used to replace coal in the metallurgical process, and promoted as an alternative of charcoal.

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Section: Pelletizationmentioning

confidence: 99%

Section: Pelletizationmentioning

confidence: 99%

A Comprehensive Review on Biomass Torrefaction

Nhuchhen¹,

Basu²,

Acharya³

2014

IJREB

174

143

View full text Add to dashboard Cite

show abstract

“…The highest density of raw EFB pellet is is 907kgm 3 , while the lowest density of raw pellet is 623kgm 3 . In the past research, the higher compaction pressure or higher die temperature is required to increase the density of torrified pellets.…”

Section: J Fundam Appl Sci 2017 9(3s) 955-968 959mentioning

confidence: 99%

“…During torrefaction of biomass, most volatile compounds are removed from biomass vapors and result in a higher energy density. In addition, the advantages of torrefaction include higher calorific value or energy density, lower moisture content and better grinding [3].…”

Section: Introductionmentioning

confidence: 99%

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Effect of torrefaction on oil palm empty fruit bunch pelletization

Ahmad¹,

Jusoh²,

Rizman³

et al. 2018

J. Fundam and Appl Sci.

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This paper focuses on the properties of raw and torrified pellet from EFB by varying different parameters including energy consumption, moisture adsorption, Meyer hardness test and pellet density. To save storage space and transport costs, it can be compressed into fuel pellets of high physical and energetic density. The pelletizing properties were determined using single pellet press and pellet stability was determined by compression testing. J Fundam Appl Sci. 2017, 9(3S), 955-968 956 Pelletization of raw and torrified empty fruit bunch (EFB) from compression single pellet press (SPP) was investigated to quantify the energy consumption and pellet properties including moisture adsorption, pellet density and Meyer hardness. Energy consumption for torrified EFB pellet were significantly higher than those for raw EFB pellet, while the moisture adsorption rate of torrified EFB pellets increased with increasing the severity of torrefaction.

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Char quality response surfaces from torrefaction of coppiced willow in a horizontal moving bed pilot plant

et al. 2018

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Characterizing the operation of a novel torrefaction plant based on horizontal moving bed reactors was the focus of this research work. Coppiced willow biomass was used as the feedstock for the torrefaction experiments carried out with this plant. The operating temperature and torrefaction residence time were each varied over a wide range in order to understand how these two parameters each influence torrefaction severity. The torrefaction severity was characterized by developing response surface plots for torrefaction metrics, including mass yield, energy yield, milling energy, and elemental composition. The operating conditions were varied from 220–280 °C with an 8–24 min residence time. The coppiced willow biomass was processed into a granular form, resulting in an average length and diameter of 19.3 and 7.5 mm, respectively. The operating conditions were found to produce a wide range of torrefaction severities with a mass yield range from 64.7–91.6 %. Temperature was found to have a greater influence over severity than exposure time. In order to understand the uncertainty of the measurements, experiments were repeated at a central point (250 °C and 16 min) six times. The repeatability was found to be ±0.72 % at the 95 % confidence limit. The response surfaces for mass and energy yield indicate that, for this feedstock, torrefaction severity below 80 % mass yield can be achieved in under 10 min at temperatures of 255 °C and above. This performance compares very favourably with other continuously fed pilot scale torrefaction plants.

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Torrefaction of oil palm mesocarp fiber and their effect on pelletizing

Cited by 52 publications

References 15 publications

A Comprehensive Review on Biomass Torrefaction

A Comprehensive Review on Biomass Torrefaction

Effect of torrefaction on oil palm empty fruit bunch pelletization

Char quality response surfaces from torrefaction of coppiced willow in a horizontal moving bed pilot plant

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