Hydrothermal carbonization, torrefaction and slow pyrolysis of Miscanthus giganteus

Wilk, Małgorzata; Magdziarz, Aneta

doi:10.1016/j.energy.2017.03.031

Cited by 137 publications

(67 citation statements)

References 38 publications

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“…Only torrefied cotton stalks obtained after four trials at 320°C started to have properties similar to coal. The similar results have been obtained by using different biomass in previous study …”

Section: Resultssupporting

confidence: 91%

“…Cotton stalks were torrefied at 260°C to 320°C, with residence times of 10, 35, and 60 minutes and density of 125, 150, and 175 kg m −3 based on parameters in experimental sets indicated in Table . When carbon content, one of the most important parameters for torrefaction, was examined, the obtained results were compatible with the literature . Mean carbon content was found to be 57.56% in trials carried out at 260°C with different residence time and density, an increase of 28% was observed after the process compared with the raw material.…”

Section: Resultssupporting

confidence: 83%

“…Kinetic modelling of the process, physical and chemical properties of the product, and possibilities for using torrefied biomass as absorbent are among remarkable research topics . Numerous studies employed the method of response surface methodology as well; however, the effect of temperature and residence time on mass and energy yield was investigated especially . Although some study was statistically analysed, the effect of heating rate with these parameters, a model equation of responses with bulk density has not been presented yet.…”

Section: Introductionmentioning

confidence: 99%

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Upgrading lignocellulosic waste to fuel by torrefaction: Characterisation and process optimization by response surface methodology

Kutlu

Koçar

2018

Int J Energy Res

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Summary Torrefied biomass is a commercial fuel, which is particularly produced from woody biomass via torrefaction and alternative to coal to reduce greenhouse gas emissions in the short term. In this study, torrefaction conditions of cotton stalk were optimised, and the effect of bulk density together with temperature and residence time on process yields and characterisation of torrefied cotton stalk was investigated. Response surface methodology using Box‐Behnken design was employed for the design of experiments and optimization. Cotton stalk was torrefied at a temperature between 260°C and 320°C, in 10, 35, and 60 minutes with bulk density of 125, 150, and 175 kgm−3. Temperature was the most effective parameter for the six responses (higher heating value, carbon content, hydrogen/carbon and oxygen/carbon ratios, mass loss, and energy yield). Besides, temperature/bulk density interaction was found to be significant for all responses whereas residence time/bulk density interaction was effective for process yields. The optimization results showed that more economical torrefied biomass with similar quality of lignite could also be produced under process conditions of 305°C‐32 minutes‐158 kgm−3. At this point, higher heating value and carbon content of product were calculated as 19.7 MJ kg−1 and 64%, respectively.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

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Upgrading lignocellulosic waste to fuel by torrefaction: Characterisation and process optimization by response surface methodology

Kutlu

Koçar

2018

Int J Energy Res

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“…However, a consistent decrease with temperature or reaction time wasn't observed. Similar decreases for the HTC of grape pomace and mischantus samples were also observed in other studies [18,19]. In this study, ash contents of hydrochars slightly changed (Figure 1).…”

Section: Fuel Characteristics Of Charssupporting

confidence: 72%

Comparison of solid biofuels produced from olive pomace with two different conversion methods: torrefaction and hydrothermal carbonization

Gultekin¹,

Olgun²,

Çeliktaş³

2018

IJET

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Olive pomace is a by-product of olive oil production process and has the potential to be a solid biofuel after thermal treatment. In this study, olive pomace was treated by two thermal conversion methods: hydrothermal carbonization (HTC) and torrefaction. Experiments were carried out under the temperature values of 250, 275, 300 and 350°C; reaction times of 10, 20 and 30 minutes for torrefaction and temperature values of 180, 200 and 220°C; reaction time of 2, 3 and 4 hours for HTC. Products with the same energy yield value (62 %) obtained the higher heating values of 23.73 and 25.20 MJ/kg for torrefaction (275°C for 20 minutes) and hydrothermal carbonization (220°C for 2 hours), respectively. Hydrothermal carbonization method has the potential to produce chars at lower temperature values and without a drying process; and obtain products with improved higher heating values, energy yields and atomic O/C and H/C ratios compare to torrefaction products.

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“…A study on six sweetcane varieties showed that the N content and carbon (C) content of the harvested sweetcane were in the range of 0.37%‐0.83% and 44.7%‐45.8%, respectively (Hu et al, ). As a result, the C/N ratio of sweetcane was from 62.6 to 121.6, and the highest value was comparable with Miscanthus × giganteus (Michel et al, ; Wilk & Magdziarz, ). In addition, the harvest time also affects the nutrient removal efficiency of sweetcane.…”

Section: Potential For Phytoremediationmentioning

confidence: 99%

Sweetcane (Erianthus arundinaceus) as a native bioenergy crop with environmental remediation potential in southern China: A review

Wang

et al. 2019

GCB Bioenergy

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Sweetcane (Erianthus arundinaceus [Retzius] Jeswiet) is an ecologically dominant warm‐season perennial grass native to southern China. It traditionally plays an important role in sugarcane breeding due to its excellent biological traits and genetic relatedness to sugarcane. Recent studies have shown that sweetcane has a great potential in bioenergy and environmental remediation. The objective of this paper is to review the current research on sweetcane biology, phenology, biogeography, agronomy, and conversion technology, in order to explore its development as a bioenergy crop with environmental remediation potential. Sweetcane is resistant to a variety of stressors and can adapt to different growth environments. It can be used for ecological restoration, soil and water conservation, contaminated land repairing, nonpoint source pollutants barriers in buffer strips along surface waters, and as an ornamental and remediation plant on roadsides and in wetlands. Sweetcane exhibits higher biomass yield, calorific value and cellulose content than other bioenergy crops under the same growth conditions, thereby indicating its superior potential in second‐generation biofuel production. However, research on sweetcane as a bioenergy plant is still in its infancy. More works need be conducted on breeding, cultivation, genetic transformation, and energy conversion technologies.

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Hydrothermal carbonization, torrefaction and slow pyrolysis of Miscanthus giganteus

Cited by 137 publications

References 38 publications

Upgrading lignocellulosic waste to fuel by torrefaction: Characterisation and process optimization by response surface methodology

Upgrading lignocellulosic waste to fuel by torrefaction: Characterisation and process optimization by response surface methodology

Comparison of solid biofuels produced from olive pomace with two different conversion methods: torrefaction and hydrothermal carbonization

Sweetcane (Erianthus arundinaceus) as a native bioenergy crop with environmental remediation potential in southern China: A review

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