Effect of Residence Time on Hydrothermal Carbonization of Corn Cob Residual

Zhang, Lei; Liu, Shanshan; Wang, Baobin; Wang, Qiang; Yang, Guihua; Chen, Jiachuan

doi:10.15376/biores.10.3.3979-3986

Cited by 46 publications

(19 citation statements)

References 23 publications

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“…3. As shown, the surface of CCR was relatively smooth while having small pores, which may have been caused by the recombination of carbon products from decarboxylation reactions and release of volatiles during the carbonization process (Liu et al 2011;Zhang et al 2015a). Figure 2b shows that a large number of microspheres were aggregated on the surface.…”

Section: Surface Morphology Studiesmentioning

confidence: 91%

Preparation and Characterization of Activated Carbon from Hydrochar by Phosphoric Acid Activation and its Adsorption Performance in Prehydrolysis Liquor

Chen¹,

Zhang²,

Yang³

et al. 2017

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Section: Surface Morphology Studiesmentioning

confidence: 91%

Preparation and Characterization of Activated Carbon from Hydrochar by Phosphoric Acid Activation and its Adsorption Performance in Prehydrolysis Liquor

Chen¹,

Zhang²,

Yang³

et al. 2017

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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

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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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“…The effect of activation on the functional groups of hydrochars was then examined using FTIR, as shown in Figure 3. Results showed reduction of peak strength of the functional groups in all waste biomass samples due to volatilization and degradation [30,43]. Coffee waste grounds (CWG) and RH showed a relatively higher degree of functional group degradation compared to corncobs (CC) and coconut sawdust (SD).…”

Section: Activationmentioning

confidence: 99%

Hydrothermally Carbonized Waste Biomass as Electrocatalyst Support for α-MnO2 in Oxygen Reduction Reaction

et al. 2020

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Sluggish kinetics in oxygen reduction reaction (ORR) requires low-cost and highly durable electrocatalysts ideally produced from facile methods. In this work, we explored the conversion and utilization of waste biomass as potential carbon support for α-MnO2 catalyst in enhancing its ORR performance. Carbon supports were derived from different waste biomass via hydrothermal carbonization (HTC) at different temperature and duration, followed by KOH activation and subsequent heat treatment. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), energy dispersive X-ray spectroscopy (EDX) and X-Ray diffraction (XRD) were used for morphological, chemical, and structural characterization, which revealed porous and amorphous carbon supports for α-MnO2. Electrochemical studies on ORR activity suggest that carbon-supported α-MnO2 derived from HTC of corncobs at 250 °C for 12 h (CCAC + MnO2 250-12) gives the highest limiting current density and lowest overpotential among the synthesized carbon-supported catalysts. Moreover, CCAC + MnO2 250-12 facilitates ORR through a 4-e‑ pathway, and exhibits higher stability compared to VC + MnO2 (Vulcan XC-72) and 20% Pt/C. The synthesis conditions preserve oxygen functional groups and form porous structures in corncobs, which resulted in a highly stable catalyst. Thus, this work provides a new and cost-effective method of deriving carbon support from biomass that can enhance the activity of α-MnO2 towards ORR.

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Effect of Residence Time on Hydrothermal Carbonization of Corn Cob Residual

Cited by 46 publications

References 23 publications

Preparation and Characterization of Activated Carbon from Hydrochar by Phosphoric Acid Activation and its Adsorption Performance in Prehydrolysis Liquor

Preparation and Characterization of Activated Carbon from Hydrochar by Phosphoric Acid Activation and its Adsorption Performance in Prehydrolysis Liquor

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

Hydrothermally Carbonized Waste Biomass as Electrocatalyst Support for α-MnO2 in Oxygen Reduction Reaction

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