Torrefaction of a solid recovered fuel (SRF) to improve the fuel properties for gasification processes

Recari, J.; Berrueco, C.; Puy, Neus; Alier, Santi; Bartrolı́, Jordi; Farriol, Xavier

doi:10.1016/j.apenergy.2017.06.014

Cited by 53 publications

(19 citation statements)

References 44 publications

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“…The MC of torrefied OPF decreased significantly to 4.40% compared with that of the raw OPF (6.86%), which can be related to the decrease of mass yield. These results are in agreement with a previous study (Recari et al, 2017).…”

Section: Ultimate Analysissupporting

confidence: 94%

“…The opposite was observed for H and O contents where both seemed to decrease with the increasing temperature. Previous researchers had also reported the same trend for C, H, and O contents (Iroba, Baik, & Tabil, 2017;Recari et al, 2017). The increment of the C content for OPF was around 19% at 300 °C compared with that of the raw OPF.…”

Section: Ultimate Analysissupporting

confidence: 68%

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Torrefaction of Oil Palm Fronds (Opf) as a Potential Feedstock for Energy Production Processes

Thaim

Rasid

Ismail

2019

Journal of Environmental Engineering and Landscape Management

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Oil palm fronds (OPF) and trunks contribute the highest biomass availability compared with other oil palm wastes. At the moment, they are usually left on the ground around the plantation area to decompose naturally and fertilize the soil. Previous researchers have focused on torrefaction of wood residues and other agricultural biomass with less attention has been paid to the utilization of Malaysia’s biomass such as OPF. Therefore, in this study, torrefaction of OPF was conducted in a tubular reactor at temperatures between 200 and 300 °C and residence time of 30 min. The results reveal an improved heating value as the temperature was increased, from 16.81 to 20.32 MJ/kg after the torrefaction process. The van Krevelen diagram also proved that torrefaction OPF could be classified as an intermediate, between raw OPF and coal. This proves the potential of OPF as one of the alternative feedstocks for energy production process through torrefaction.

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Section: Ultimate Analysissupporting

confidence: 94%

Section: Ultimate Analysissupporting

confidence: 68%

Torrefaction of Oil Palm Fronds (Opf) as a Potential Feedstock for Energy Production Processes

Thaim

Rasid

Ismail

2019

Journal of Environmental Engineering and Landscape Management

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“…As the pre-treatment temperature increased (from torrefaction to carbonization), the volatile mater decreased and tar content dropped. The decrease of the tar content according to the severity of the torrefaction was also obtained in the literature during the gasification of torrefied waste at medium and severer condition (Recari et al, 2017). In addition to the volatiles reduction, the high temperature achieved (900 to 1000°C) and the thick reduction zone obtained during the pre-treated biomass gasification favoured the tar thermal and catalytic cracking as suggested by Dudyński et al (2015).…”

Section: Impact Of Pre-treatment On the Tars Contentsupporting

confidence: 61%

Impact of pre-treatment by torrefaction and carbonization on temperature field, energy efficiency and tar content during the gasification of cotton stalks

Ibrahim¹,

Sanogo²,

Ouiminga³

et al. 2018

J. Eng. Technol. Res.

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The present study focused on the gasification of raw and pre-treated cotton stalks (CS) by torrefaction and carbonization. Temperature fields, mass balance, energy balance, energy efficiency and tar content of the gas were investigated for the gasification of different types of biomass materials (raw, torrefied and carbonized CS). High temperature and thick reduction zone were obtained during the gasification of pre-treated CS comparatively to the gasification of raw CS. Thus, the thermal and catalytic cracking of the tars may be more pronounced for the gasification of pre-treated biomass particularly for the carbonized biomass. Mass and energy balances have shown a reduction of biomass conversion during the gasification of torrefied and carbonized CS. Indeed, the energy efficiency of 58.7, 46.5 and 38.4% were obtained for raw, carbonized and torrefied CS, respectively. The lowest energetic performances were found during the gasification of torrefied CS due probably to the severe degree of the torrefaction. However, the tar content in gas was drastically decreased by the pre-treatment of the CS. Indeed, the tar contents of 4.41, 2.24 and 0.10 g/Nm 3 were obtained for the gasification of raw, torrefied and carbonized CS, respectively.

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“…A study by Iroba et al [37] conducted a microwave-assisted torrefaction where the increase in calorific value was observed with an increase in the torrefaction residence time. Recari et al [38], in their study, showed that the calorific value improved only at 290 °C. These results can be correlated with the degree of torrefaction attained in this study as the degree of torrefaction increases with the increase in the calorific value.…”

Section: Degree Of Torrefactionmentioning

confidence: 99%

Thermal Pre-Treatment of Sewage Sludge in a Lab-Scale Fluidized Bed for Enhancing Its Solid Fuel Properties

Karki

Poudel

2018

Applied Sciences

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Thermal pre-treatment of non-lignocellulosic biomass, sewage sludge, using a lab-scale fluidized bed reactor was carried out in order to enhance its solid fuel properties. The influence of the torrefaction temperature range from 200-350 • C and 0-50 min residence time on the physical and chemical properties of the torrefied product was investigated. Properties of the torrefied product were analyzed on the basis of the degree of torrefaction, ultimate and proximate analysis, and gas analysis. An attempt was made to obtain the chemical exergy of sewage sludge. An elevated torrefaction temperature presented a beneficial impact on the degree of torrefaction and chemical exergy. Moreover, the effect of the torrefaction temperature and residence time on the elemental variation of sewage sludge exhibited an increase in the weight percentage of carbon while the H/C and O/C molar ratios deteriorated. Additionally, the product gas emitted during torrefaction was analyzed to study the pathway of hydrocarbons and oxygen containing compounds. The compounds with oxygen were emitted at higher temperatures in contrast to hydrocarbon gases. In addition, the study of various correlations for predicting the calorific value of torrefied sewage sludge was made.

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Torrefaction of a solid recovered fuel (SRF) to improve the fuel properties for gasification processes

Cited by 53 publications

References 44 publications

Torrefaction of Oil Palm Fronds (Opf) as a Potential Feedstock for Energy Production Processes

Torrefaction of Oil Palm Fronds (Opf) as a Potential Feedstock for Energy Production Processes

Impact of pre-treatment by torrefaction and carbonization on temperature field, energy efficiency and tar content during the gasification of cotton stalks

Thermal Pre-Treatment of Sewage Sludge in a Lab-Scale Fluidized Bed for Enhancing Its Solid Fuel Properties

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