Effects of process parameters on the physicochemical properties of corn stalk hydrochar and the removal of alkali and alkaline earth metals

Li, Yang; Wang, Hui; Sun, Jianwei; Xu, Yi; Li, Pengcheng; Xu, Yang; Wu, Shaohua

doi:10.1049/rpg2.12082

Cited by 17 publications

(7 citation statements)

References 37 publications

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“…The blends were stirred for 12 h to swell fully. More details of the entire system and operating process were described in our previous study [16]. RHC samples which were prepared under the operating conditions of initial pressure of 2 MPa, reaction temperature of 200 • C, and retention time of 2 h are employed to co-fire with ZD coal.…”

Section: Sample Preparationmentioning

confidence: 99%

Co‐combustion and ash characteristics of Zhundong coal with rice husk hydrochar prepared by the hydrothermal carbonization technology for co‐combustion

Wang

Zhu

et al. 2021

IET Renewable Power Gen

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The high content of the AAEMs in Zhundong (ZD) coal causes easily slagging on the heating surface of boilers, and the addition of rice husk hydrochar (RHC) is expected to alleviate slagging by introducing SiO2 content. ZD coal is co‐fired with RHC according to different blend ratios, co‐combustion ashes are prepared subsequently at different temperatures. The co‐combustion characteristics of blends are studied firstly by using TGA, considering the combustion process can bring impacts on ash characteristics. Then the effects of the blend ratio and ashing temperature on the ash characteristics are discussed. The ash samples are characterized by XRF, ICP‐AES, XRD and SEM. The results show that an increase in the blend ratio of the RHC reduces the ignition temperature and lengthens the burnout time, which transforms the ash characteristics. The contents of quartz, gehlenite and andalusite greatly increase. The number of fine particles in the ash decreases, while the particle size increases. The ash fusion temperatures (AFTs) are at the lowest value at 8:2 and exceed totally that of ZD coal at 7:3. Considering to increase the AFTs of ZD coal, at least the blend ratio of 7:3 of ZD coal and RHC is recommended for co‐combustion.

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Section: Sample Preparationmentioning

confidence: 99%

Co‐combustion and ash characteristics of Zhundong coal with rice husk hydrochar prepared by the hydrothermal carbonization technology for co‐combustion

Wang

Zhu

et al. 2021

IET Renewable Power Gen

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“…The diffraction peak at 26.5° was attributed to graphitic carbon. [ 56 ] The presence of an amorphous structure is confirmed by broad peaks at 2 θ values in the region from 16° to 25° and from 33.5° to 38.3°. The hydrochar sample shows a peak around 2 θ = 22°, which indicates the formation of amorphous carbon.…”

Section: Resultsmentioning

confidence: 99%

The comparative study of biocomposites based on hydrochar and chitosan‐modified urea‐formaldehyde resins

Ristić¹,

Samaržija‐Jovanović²,

Jovanović³

et al. 2023

Vinyl Additive Technology

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To provide new insight into the field of urea‐formaldehyde (UF) adhesives science, in this work, for the first time, UF resin was modified with hydrochar of spent mushroom substrate (HCUF) and chitosan (CHUF) to investigate the effect of these bio‐fillers on the hydrolytic and thermal stability of in situ prepared UF resins. The characterization of the modified UF biocomposites was performed using X‐ray diffraction analysis (XRD), Fourier transforms infrared spectroscopy (FTIR), non‐isothermal thermogravimetric analysis (TG), differential thermal gravimetry (DTG), and differential thermal analysis (DTA). Scanning electron micrographs (SEM) of the CHUF and HCUF biocomposites show a spherical structure that differs from each other because the surface of the CHUF biocomposite has pronounced pores that form a network structure. With its hydroxyl and amino groups, chitosan bonding to UF resin through hydrogen bonds, which is confirmed by FTIR analysis. The content of free FA in CHUF biocomposite is 0.06%, while that of HCUF is higher and amounts to 0.48%. The content of released FA in both modified UF biocomposites was similar (2.5% and 2.8% for CHUF and HCUF, respectively). The hydrolytic stability of CHUF is slightly higher compared to the HCUF biocomposite. Thermal analysis shows that the CHUF is thermally more stable because it starts to decompose at a slightly higher temperature than the HCUF biocomposite.

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“…The cellulose content declined quickly until it vanished as the temperature rose. These findings suggest that at temperatures over 200°C, the microcrystalline structure of the CC HC started to quickly decay [31]. The microcrystalline structure was destroyed by the HTC treatment.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Adsorption of Rose Bengal Dye from Aqueous Solution Using NaOH Activated Hydrochar Derived from Corncob Waste

Sivaranjanee,

Kumar

2023

Adsorption Science & Technology

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A potential approach to the preparation of affordable activated hydrochar is the hydrothermal carbonization of biomass wastes. In this study, hydrochar was made by hydrothermally carbonizing corncob wastes and then activating them with sodium hydroxide (NaOH). According to the findings, the adsorption capabilities of hydrochar generated at prolonged retention durations, lesser liquid-to-solid ratios, and elevated temperatures were considerably greater. The hydrochars were then analyzed utilizing a variety of characterization methods, and batch tests involving the sorption of rose bengal dye were carried out under a variety of conditions. According to the findings, activated hydrochar has a specific surface area of 12.794 m2/g. In order to better understand and characterize the process of rose bengal dye adsorption, sorption kinetics, and sorption equilibrium onto the produced hydrochars, sorption kinetics and isotherms were further examined through experimental data fitting. The NaOH-activated hydrochar’s adsorption capacity was 799.9 mg/g, respectively. The objective of this research was to assess the viability of using NaOH-activated hydrochar derived from corncobs as an economical and efficient sorbent for eliminating anionic dyes like rose bengal from aqueous solutions. Additionally, the study sought to investigate how various factors influence its sorption capabilities and to provide insights into the adsorption process through kinetic and isotherm analyses.

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Effects of process parameters on the physicochemical properties of corn stalk hydrochar and the removal of alkali and alkaline earth metals

Cited by 17 publications

References 37 publications

Co‐combustion and ash characteristics of Zhundong coal with rice husk hydrochar prepared by the hydrothermal carbonization technology for co‐combustion

Co‐combustion and ash characteristics of Zhundong coal with rice husk hydrochar prepared by the hydrothermal carbonization technology for co‐combustion

The comparative study of biocomposites based on hydrochar and chitosan‐modified urea‐formaldehyde resins

Enhanced Adsorption of Rose Bengal Dye from Aqueous Solution Using NaOH Activated Hydrochar Derived from Corncob Waste

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