Influence of reaction time and temperature on product formation and characteristics associated with the hydrothermal carbonization of cellulose

Lu, Xiaowei; Pellechia, Perry J.; Flora, Joseph R.V.; Berge, Nicole D.

doi:10.1016/j.biortech.2013.03.163

Cited by 229 publications

(128 citation statements)

References 35 publications

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“…It was studied on pine between 215 -295 °C and energy yields were observed to increase from 70 % to % 77 [29]. On the other hand, in another study on coconut and eucalyptus leaves (temperatures between 200 -300 °C), energy yields decreased respectively from 76.67 % to 65 % and from 87.34 % to 61.32 % [30]. These opposite results were because of the difference between the biomass resources.…”

Section: Higher Heating Value Energy and Mass Yieldsmentioning

confidence: 96%

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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Section: Higher Heating Value Energy and Mass Yieldsmentioning

confidence: 96%

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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“…The carbon content of the produced hydrochar ranges from 42-73%. According to many literature [14][15][16][17], carbon contents of hydrochar from the carbonization process were vary depend on other compounds. So, it is very hard to compare between carbon-contents measured in this study with reported in other literature.…”

Section: Proximate and Ultimate Analysis Of Hydrocharmentioning

confidence: 99%

Hydrothermal carbonization of biomass waste under low temperature condition

et al. 2018

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Abstract. In this paper, the use of banana peel for energy purposes was investigated. Banana peel is a lignocellulosic waste since it is the most widely produced and consumed fruit in Indonesia. Among the others, hydrothermal carbonization (HTC) was chosen as alternative themochemical process, suitable for high moisture biomass. Through a 1 L stirred reactor, hydrothermal treatments were performed under low temperature condition (190, 210 and 230 o C), residence times (30 and 60 min), and biomass to water ratio (1:3, 1:5, and 1:10). Three of product were collected from the process with primary material balance. Solid phase (hydrochar) was evaluated in terms of calorific value, proximate and ultimate analysis. The results suggested that the hydrothermal carbonization of banana peel gave high heating value (HHV) of 20.09 MJ/kg for its char after dried naturally.

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“…These studies on HTC indicated that the physicochemical characteristics of hydrochar were dependent on the property of feedstock. In addition, the process parameters such as reaction temperature and time had a significant effect on the HTC process (Funke and Ziegler 2010;Lu and Pellechia 2013;Gao et al 2013;Zhang et al 2015). Biomass could undergo complicated chemical reactions under different process conditions including hydrolysis, dehydration, decarboxylation, and condensation polymerization during hydrothermal carbonization (Funke and Ziegler 2010;Sevilla et al 2011;Kang et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Chemical, Energetic, and Structural Characteristics of Hydrothermal Carbonization Solid Products for Lawn Grass

Guo¹,

Dong²,

Liu³

et al. 2015

BioResources

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Hydrothermal carbonization (HTC) of lawn grass was carried out at 200 °C and 240 °C for 30 to 180 min. The chemical, energetic, and structural characteristics of HTC solid residues were investigated. Results from HTC experiments indicate that solid mass yield of all solid residues was 31 to 50%. The hydrogen/carbon (H/C) and oxygen/carbon (O/C) atomic ratios of all solid residues were 1.17 to 1.64 and 0.45 to 0.65, respectively. The higher heating value (HHV) increased up to 20.54 MJ/kg with increasing HTC residence time at 240 °C for 180 min. Both XRD patterns and FTIR spectra show that differences occur with samples treated as compared to the raw material. Solid hydrochar exhibited higher ordered structure characteristics and was mainly derived from amorphous components degradation when the residence time was increased from 30 to 180 min at 200 °C, while hydrochar formed from cellulose components degradation with increased residence time at 240 °C. According to the results studied, it was found that prolonged residence time was favorable to the formation of hydrochar from lawn grass.

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Influence of reaction time and temperature on product formation and characteristics associated with the hydrothermal carbonization of cellulose

Cited by 229 publications

References 35 publications

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

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

Hydrothermal carbonization of biomass waste under low temperature condition

Chemical, Energetic, and Structural Characteristics of Hydrothermal Carbonization Solid Products for Lawn Grass

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