Evaluation of the optimal activation parameters for almond shell bio-char production for capacitive deionization

Maniscalco, Manfredi P.; Corrado, Chiara; Volpe, Roberto; Messineo, Antonio

doi:10.1016/j.biteb.2020.100435

Cited by 19 publications

(8 citation statements)

References 54 publications

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“…Tests on bamboo shells were reported by [65], resulting in a lower capacitance with respect to the ones reported by Gou et al [89], and equal to 209 F g −1 at 0.5 A g −1 . Similarly in this case, authors performed an acid HTC treatment with 1% w/w H 2 SO 4 solution and the obtained hydrochars, before being activated in KOH at 600-800 • C, were carbonized with melamine under N 2 at a temperature of 600 • C, with a char-to-melamine ratio of 1:4 w/w.…”

Section: Supercapacitors and Batteries Applicationmentioning

confidence: 74%

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Hydrothermal Carbonization as a Valuable Tool for Energy and Environmental Applications: A Review

2020

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Hydrothermal carbonization (HTC) represents an efficient and valuable pre-treatment technology to convert waste biomass into highly dense carbonaceous materials that could be used in a wide range of applications between energy, environment, soil improvement and nutrients recovery fields. HTC converts residual organic materials into a solid high energy dense material (hydrochar) and a liquid residue where the most volatile and oxygenated compounds (mainly furans and organic acids) concentrate during reaction. Pristine hydrochar is mainly used for direct combustion, to generate heat or electricity, but highly porous carbonaceous media for energy storage or for adsorption of pollutants applications can be also obtained through a further activation stage. HTC process can be used to enhance recovery of nutrients as nitrogen and phosphorous in particular and can be used as soil conditioner, to favor plant growth and mitigate desertification of soils. The present review proposes an outlook of the several possible applications of hydrochar produced from any sort of waste biomass sources. For each of the applications proposed, the main operative parameters that mostly affect the hydrochar properties and characteristics are highlighted, in order to match the needs for the specific application.

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Section: Supercapacitors and Batteries Applicationmentioning

confidence: 74%

“…Soybean root was tested by Guo et al [89], resulting in a great electrode capacitance and cycling stability. Authors performed an acid HTC treatment at 180 • C for 18 h by using a 5% w/w H 2 SO 4 solution.…”

Section: Supercapacitors and Batteries Applicationmentioning

confidence: 99%

Hydrothermal Carbonization as a Valuable Tool for Energy and Environmental Applications: A Review

2020

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“…After activation, the surface area of biochar dramatically increased by more than 30 times via CO 2 activation. This result is related to a strong interaction in the CO 2 -carbon reaction (Maniscalco et al 2020). However, when LDH was supported onto biochar the surface area decreased, which indicated that the voids on the surface of the biochar were filled with the loaded nano-material CaFe/LDH.…”

Section: Materials Characterizationmentioning

confidence: 93%

Phosphate adsorption improvement using a novel adsorbent by CaFe/LDH supported onto CO2 activated biochar

Missau

Rodrigues

Bertuol

et al. 2022

Water Science and Technology

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It is imperative to remove phosphate from the aquatic system. This nutrient in excess can cause environmental problems such as eutrophication. Therefore, aiming to enhance phosphate removal, this work presents a novel adsorbent developed from the construction of Ca2+/Fe3+ layer double hydroxides (CaFe/LDH) supported onto biochar physically activated with CO2 [CaFe/Biochar (CO2)]. Pristine biochar was produced from the pyrolysis of Eucalyptus saligna sawdust, activated with CO2, and then impregnated with CaFe/LDH. The CaFe/Biochar (CO2) was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and Brunauer–Emmett–Teller (BET). The characterization confirmed a proper synthesis of the new adsorbent. Experiments were conducted in the form of batch adsorption. Results indicated that the optimum pH and adsorbent dosage were 2.15 and 0.92 g L−1, respectively. Adsorption kinetics, isotherms, and thermodynamics were also evaluated. Adsorption kinetics and isotherms were better fitted by the pseudo n order and Freundlich models, respectively. Results also indicated a better adsorption capacity (99.55 mg·g−1) at 55 °C. The thermodynamic indicators depicted that the adsorption process was favorable, spontaneous, and endothermic. Overall, CaFe/Biochar (CO2) could be potentially applied for the adsorptive removal of phosphate from an aqueous solution.

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“…Maniscalco et al derived porous carbon from almond shell pyrolyzed at 800-1000 °C and CO 2 activation. [62] The carbon material obtained at 900 °C exhibits a maximum SAC value of 19.2 mg g À 1 . Hai et al derived porous carbon from date seeds by performing pyrolysis at 900 °C in presence of KOH.…”

Section: Green Carbonmentioning

confidence: 97%

Electrode Materials for Desalination of Water via Capacitive Deionization

et al. 2023

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Recent years have seen the emergence of capacitive deionization (CDI) as a promising desalination technique for converting sea and wastewater into potable water, due to its energy efficiency and eco‐friendly nature. However, its low salt removal capacity and parasitic reactions have limited its effectiveness. As a result, the development of porous carbon nanomaterials as electrode materials have been explored, while taking into account of material characteristics such as morphology, wettability, high conductivity, chemical robustness, cyclic stability, specific surface area, and ease of production. To tackle the parasitic reaction issue, membrane capacitive deionization (mCDI) was proposed which utilizes ion‐exchange membranes coupled to the electrode. Fabrication techniques along with the experimental parameters used to evaluate the desalination performance of different materials are discussed in this review to provide an overview of improvements made for CDI and mCDI desalination purposes

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Evaluation of the optimal activation parameters for almond shell bio-char production for capacitive deionization

Cited by 19 publications

References 54 publications

Hydrothermal Carbonization as a Valuable Tool for Energy and Environmental Applications: A Review

Hydrothermal Carbonization as a Valuable Tool for Energy and Environmental Applications: A Review

Phosphate adsorption improvement using a novel adsorbent by CaFe/LDH supported onto CO2 activated biochar

Electrode Materials for Desalination of Water via Capacitive Deionization

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