Hydrothermal Carbonization of Corncob Residues for Hydrochar Production

Zhang, Lei; Wang, Qiang; Wang, Baobin; Yang, Guihua; Lucia, Lucian A.; Chen, Jiachuan

doi:10.1021/ef502462p

Cited by 164 publications

(65 citation statements)

References 24 publications

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“…The CCR was milled into 100-mesh particle sizes after air-drying. The chemical composition, such as cellulose 72.3%, lignin 16.2%, hemicellulose 7.2%, extractives 8.1%, and ash 4.2%, was reported in an earlier report (Zhang et al 2015b). The PHL was obtained from a plant in Shandong, China that produces kraft-based dissolving pulp using poplar.…”

Section: Methodsmentioning

confidence: 96%

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: Methodsmentioning

confidence: 96%

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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“…An opposite view was reported by Román et al (2012), that a very slight decrease on the solid yield was determined for hydrothermal carbonization of walnut shell and sunflower stem. In our previous study, the effect of temperature on hydrothermal carbonization of CCR was investigated, and the results showed that the HHV increased 48% from that of the raw material, which can be achieved under the conditions of 250 °C for 1.5 h (Zhang et al 2015).…”

Section: Introductionmentioning

confidence: 98%

Effect of Residence Time on Hydrothermal Carbonization of Corn Cob Residual

et al. 2015

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Hydrothermal carbonization is a promising technique for conversion of industrial waste into valuable products. Producing hydrochar from corn cob residual (CCR) in a cost-effective way is key, from an economic standpoint. For this purpose, the effect of residence time in the range of 0.5 to 6 h was studied under the optimal temperature of 250 °C. Results showed that the higher heating value (HHV) of hydrochar increased approximately 40% in comparison to that of the raw material; however, prolonging the residence time beyond 0.5 h had a negligible effect on the HHV increase. Chemical compositions and H/C and O/C ratios of hydrochars revealed a minimal effect of longer residence time. Furthermore, thermogravimetric and derivative thermogravimetric analysis (TG/DTG), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) analysis of hydrochars also verified that the pyrolysis behavior and chemical structure of hydrochars with various residence times were similar.

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“…The presence of aromatic rings is evidenced by the weak band in the 750 to 875 cm -1 region, which corresponds to the aromatic C-H out of plane bending. Additionally, the medium intensity peak observed at 1620 cm -1 indicates aromatic C=C vibrations (Kang et al 2012;Zhang et al 2015). These samples also possess an aliphatic C-H structure at 2800 to 3000 cm -1 , which can be attributed to the aliphatic stretching as well as spectra in the 1000-to 1460-cm -1 region, corresponding to the C-O stretching in hydroxyl, ester or ether, and O-H bending vibrations (Presser et al 2011).…”

Section: Resultsmentioning

confidence: 96%

Catalytic Hydrothermal Upgrading of α-Cellulose using Iron Salts as a Lewis Acid

Hamid¹,

Teh²,

Lim³

2015

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The catalytic hydrothermal carbonization (C-HTC) method is proposed as a way to convert renewable feedstocks into carbon nanomaterial, using α-cellulose as the model compound. In this study, cellulose reacted with a controlled amount of Lewis acid catalyst (FeCl2 and FeCl3) under hydrothermal conditions, at temperatures ranging from 180 to 220 °C, for 6 to 24 h. The Lewis acid catalyst's effect on the formation of carbon nanomaterials in the C-HTC reaction was investigated. This study showed that Lewis acid catalysts promoted the complete carbonization of cellulose at a reduced temperature of 200 °C. The addition of FeCl2 in C-HTC also promoted greater C=O functionality compared to FeCl3. Furthermore, the surface area of the carbon nanomaterials derived from the hydrothermal carbonization of cellulose increased from 7.92 to 15.87 and 12.96 m 2 g -1for the uncatalysed, FeCl2 and FeCl3-catalysed HTC, respectively. The findings in this study shed light on the effect of Lewis acid properties on the tunability of functional groups in the preparation of carbonaceous materials for high-end applications.

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Hydrothermal Carbonization of Corncob Residues for Hydrochar Production

Cited by 164 publications

References 24 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

Effect of Residence Time on Hydrothermal Carbonization of Corn Cob Residual

Catalytic Hydrothermal Upgrading of α-Cellulose using Iron Salts as a Lewis Acid

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