Effect of hydrothermal carbonization temperature on combustion behavior of hydrochar fuel from paper sludge

Lin, Yousheng; Ma, Xiaoqian; Peng, Xiaowei; Hu, Shengmin; Yu, Zhaosheng; Fang, Shiwen

doi:10.1016/j.applthermaleng.2015.08.064

Cited by 187 publications

(95 citation statements)

References 35 publications

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“…The lowest value was obtained for biochar at 700 • C: 2.11 × 10 −7 ·min −2 · • C −3 . The presented results and literature review lead us to the conclusion that biomass contains a higher amount of VM in comparison to chars, as the combustion index S was the Energies 2020, 13, 1050 9 of 18 highest [36,37]. Additionally, the D i index confirmed this tendency.…”

Section: Thermogravimetric Analysis Of Combustion Properties Of Pine supporting

confidence: 62%

Biomass Thermochemical Conversion via Pyrolysis with Integrated CO2 Capture

et al. 2020

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The presented work is focused on biomass thermochemical conversion with integrated CO2 capture. The main aim of this study was the in-depth investigation of the impact of pyrolysis temperature (500, 600 and 700 °C) and CaO sorbent addition on the chemical and physical properties of obtained char and syngas. Under the effect of the pyrolysis temperature, the properties of biomass chars were gradually changed, and this was confirmed by examination using thermal analysis, scanning electron microscopy, X-ray diffraction, and porosimetry methods. The chars were characterised by a noticeable carbon content (two times at 700 °C) resulting in a lower O/C ratio. The calculated combustion indexes indicated the better combustible properties of chars. In addition, structural morphology changes were observed. However, the increasing pyrolysis temperature resulted in changes of solid products; the differences of char properties were not significant in the range of 500 to 700 °C. Syngas was analysed using a gas chromatograph. The following main components were identified: CO, CO2, CH4, H2 and C2H4, C2H6, C3H6, C3H8. A significant impact of CaO on CO2 adsorption was found. The concentration of CO2 in syngas decreased with increased temperature, and the highest decrease occurred in the presence of CaO from above 60% to below 30% at 600 °C.

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Section: Thermogravimetric Analysis Of Combustion Properties Of Pine supporting

confidence: 62%

Biomass Thermochemical Conversion via Pyrolysis with Integrated CO2 Capture

et al. 2020

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“…A major advantage of HTC over DT is the ability to utilize wet feedstocks and avoid the complexity and cost of pre-drying. This feedstock flexibility is illustrated in numerous recent literature reports describing use of HTC to treat food wastes [13][14][15], agricultural residues [16][17][18][19], sewage sludge [20,21], municipal solid waste [22,23], pulp mill streams [24][25][26][27], and other feedstocks [28][29][30][31][32]. Kambo and Dutta recently compared DT and HTC processes, along with their respective solid products [33,34].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal carbonization (HTC) of loblolly pine using a continuous, reactive twin-screw extruder

Hoekman

Broch

Felix

et al. 2017

Energy Conversion and Management

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Hydrothermal carbonization (HTC) has become an accepted means of converting a wide variety of lignocellulosic feedstocks into solid hydrochars, which have improved physical and chemical properties compared to raw biomass. To date, HTC applications have involved batch or semicontinuous process systems, which has limited their economic viability. The work presented here describes a fully-continuous HTC process, made possible by use of a specially modified twinscrew extruder (TSE). The reaction time within this fast HTC (FHTC) reactor system is very short (20-30 sec.) as compared to a typical batch reactor. Therefore, the concept of reaction "severity factor" is used when comparing the FHTC products with those produced in other reactor systems. While solid hydrochar produced in the FHTC system has different physical properties than hydrochar from batch reactor systems, these materials exhibit similar energy densification and pelletization behavior, when produced under comparable severity conditions. However, total hydrochar yields are considerably higher from the FHTC reactor compared to batch reactor systems. This is a consequence of the de-pressurization process in the FHTC system, whereby most water-soluble organic products are retained in the hydrochar, rather than exiting the process in a separate aqueous product stream. FHTC treatment of loblolly pine at a severity factor of 5.3 (290 °C) produced a hydrochar yield of nearly 85% (based on dry feedstock mass). Condensation of the flashed vapor products provided a relatively clean water stream, containing only 1.2% organicsprimarily furfural and acetic acid. Recovery of these organics and recycling of the condensed water would further improve the cost-effectiveness of FHTC operations.

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“…Finally, due to their rich and tunable surface functionalities (mainly oxygen ones), biomass HCs have been used in many carbo-catalyzed reactions in which specific active sites are needed, providing a more simple and environmental benign route, without the addition of acids, such as HNO 3 or H 2 SO 4 , to create such functionalities. Some examples are nitrobenzene reduction and Beckmann rearrangement reactions, using glucose HC [111] and glyceron etherification [112].…”

Section: Catalystmentioning

confidence: 99%

Hydrothermal Carbonization: Modeling, Final Properties Design and Applications: A Review

et al. 2018

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Active research on biomass hydrothermal carbonization (HTC) continues to demonstrate its advantages over other thermochemical processes, in particular the interesting benefits that are associated with carbonaceous solid products, called hydrochar (HC). The areas of applications of HC range from biofuel to doped porous material for adsorption, energy storage, and catalysis. At the same time, intensive research has been aimed at better elucidating the process mechanisms and kinetics, and how the experimental variables (temperature, time, biomass load, feedstock composition, as well as their interactions) affect the distribution between phases and their composition. This review provides an analysis of the state of the art on HTC, mainly with regard to the effect of variables on the process, the associated kinetics, and the characteristics of the solid phase (HC), as well as some of the more studied applications so far. The focus is on research made over the last five years on these topics.

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Effect of hydrothermal carbonization temperature on combustion behavior of hydrochar fuel from paper sludge

Cited by 187 publications

References 35 publications

Biomass Thermochemical Conversion via Pyrolysis with Integrated CO2 Capture

Biomass Thermochemical Conversion via Pyrolysis with Integrated CO2 Capture

Hydrothermal carbonization (HTC) of loblolly pine using a continuous, reactive twin-screw extruder

Hydrothermal Carbonization: Modeling, Final Properties Design and Applications: A Review

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