Co-Hydrothermal Carbonization of coal-biomass blend: Influence of temperature on solid fuel properties

Saba, A.E.; Saha, Pretom; Reza, Mehedi

doi:10.1016/j.fuproc.2017.08.016

Cited by 72 publications

(50 citation statements)

References 39 publications

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“…Yanfen et al [66] stated that paper pulp and fiber are the main organic elements of PMS and because of the degradation of hemicellulose, cellulose, and lignin present in the sludges are primarily responsible for these peaks. Previous studies have also found that hemicellulose decomposes between 200-300 • C during pyrolysis, while cellulose decomposes between 300-400 • C. The pyrolysis of lignin starts above 300 • C and continues for a wide temperature range [58]. All the peaks illustrated in DTG curve of Figure 2b agree with these findings.…”

Section: Fuel Characteristics Of Hydrocharssupporting

confidence: 86%

“…Previous studies have also found that hemicellulose decomposes between 200-300 °C during pyrolysis, while cellulose decomposes between 300-400 °C. The pyrolysis of lignin starts above 300 °C and continues for a wide temperature range [58]. All the peaks illustrated in DTG curve of Figure 2b agree with these findings.…”

Section: Fuel Characteristics Of Hydrocharssupporting

confidence: 84%

“…The HHV daf of raw sludges varies from 13.0 to 21.4 MJ kg −1 , where DPS has the minimum, PSS 1 has the maximum, and the others fall in between. The HHV daf of all sludges are lower than the HHV of bituminous coal (25.4-27.4 MJ kg −1 ) [58,59]. The HHV daf of hydrochars produced at 180 and 220 • C were similar to their individual raw samples.…”

Section: Product Distribution and Energy Densificationmentioning

confidence: 77%

“…The oxygen content decreases from 44.4% to 18.5%, 37.0% to 29.6%, 30.3% to 16.0%, 45.8% to 25.0%, 34.6% to 9.2%, and 48.4% to 3.3% for PS, DPS, PSS 1 , PSS 2 , PFR, and PTS, respectively. The loss of hydroxyl groups due to the dehydration reaction during HTC results in lower the oxygen content [58]. The increase in carbon and a decrease in oxygen content complement the HHV increases after HTC treatment.…”

Section: Chemical Characteristics Of Pms Hydrochars Produced At 260 • Cmentioning

confidence: 98%

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Hydrothermal Carbonization of Various Paper Mill Sludges: An Observation of Solid Fuel Properties

et al. 2019

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Each year the pulp and paper industries generate enormous amounts of effluent treatment sludge. The sludge is made up of various fractions including primary, secondary, deinked, fiber rejects sludge, etc. The goal of this study was to evaluate the fuel properties of the hydrochars produced from various types of paper mill sludges (PMS) at 180 °C, 220 °C, and 260 °C. The hydrochars, as well as the raw feedstocks, were characterized by means of ultimate analysis, proximate analysis, moisture, ash, lignin, sugar, and higher heating value (HHVdaf) measurements. Finally, combustion indices of selected hydrochars were evaluated and compared with bituminous coal. The results showed that HHVdaf of hydrochar produced at 260 °C varied between 11.4 MJ/kg and 31.5 MJ/kg depending on the feedstock. This implies that the fuel application of hydrochar produced from PMS depends on the quality of feedstocks rather than the hydrothermal carbonization (HTC) temperature. The combustion indices also showed that when hydrochars are co-combusted with coal, they have similar combustion indices to that of coal alone. However, based on the energy and ash contents in the produced hydrochars, Primary and Secondary Sludge (PPS2) could be a viable option for co-combustion with coal in an existing coal-fired power plant.

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Section: Fuel Characteristics Of Hydrocharssupporting

confidence: 86%

Section: Fuel Characteristics Of Hydrocharssupporting

confidence: 84%

Section: Product Distribution and Energy Densificationmentioning

confidence: 77%

Section: Chemical Characteristics Of Pms Hydrochars Produced At 260 • Cmentioning

confidence: 98%

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Hydrothermal Carbonization of Various Paper Mill Sludges: An Observation of Solid Fuel Properties

et al. 2019

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“…A two-steps HTC process and the addition of an organic acid (CH 3 COOH) is also investigated. The two first parameters, temperature and reaction time, have been considered by several authors [7,[22][23][24], which concluded that product distribution was mainly affected by operating temperature and that the reaction time does not play a significant role. Usually the moisture content was not evaluated.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Carbonization Brewer’s Spent Grains with the Focus on Improving the Degradation of the Feedstock

2018

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Hydrochar is a very interesting product from agricultural and food production residues. Unfortunately, severe conditions for complete conversion of lignocellulosic biomass is necessary, especially compared to the conversion of sugar compounds. The goal of this work is to improve the conversion of internal carbohydrates by application of a two-steps process, by acid addition and slightly higher water content. A set of experiments at different temperatures (180, 200, and 220 • C), reaction times (2 and 4 h), and moisture contents (80% and 90%) was performed to characterize the solid (high heating value (HHV), elemental) and liquid product phase. Afterwards, acid addition for a catalyzed hydrolysis reaction during hydrothermal carbonization (HTC) and a two-steps reaction (180 and 220 • C) were tested. As expected, a higher temperature leads to higher C content of the hydrochar and a higher fixed carbon (FC) content. The same effect was found with the addition of acids at lower temperatures. In the two-steps reaction, a primary hydrolysis step increases the conversion of internal carbohydrates. Higher water content has no significant effect, except for increasing the solubility of ash components.

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Enthalpy change during hydrothermal carbonization of biomass: a critical review

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et al. 2019

J Therm Anal Calorim

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Co-Hydrothermal Carbonization of coal-biomass blend: Influence of temperature on solid fuel properties

Cited by 72 publications

References 39 publications

Hydrothermal Carbonization of Various Paper Mill Sludges: An Observation of Solid Fuel Properties

Hydrothermal Carbonization of Various Paper Mill Sludges: An Observation of Solid Fuel Properties

Hydrothermal Carbonization Brewer’s Spent Grains with the Focus on Improving the Degradation of the Feedstock

Enthalpy change during hydrothermal carbonization of biomass: a critical review

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