Effects of physical and chemical activations on the performance of biochar applied in supercapacitors

Hsiao, Chung-Hsuan; Gupta, Shivam; Lee, Chi-Young; Tai, Nyan‐Hwa

doi:10.1016/j.apsusc.2022.155560

Cited by 30 publications

(10 citation statements)

References 42 publications

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“…These modifications focus on improving characteristics such as surface area, porosity, and functionality, which ultimately lead to increased adsorption of heavy metals [133] , [134] . A widely used modification technique is incorporating substances that can cause the precipitation of heavy metals on biochar [135] .…”

Section: Biochar Modificationmentioning

confidence: 99%

Utilization of biochar for remediation of heavy metals in aqueous environments: A review and bibliometric analysis

Phiri,

Moja,

Nkambule

et al. 2024

Heliyon

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Section: Biochar Modificationmentioning

confidence: 99%

Utilization of biochar for remediation of heavy metals in aqueous environments: A review and bibliometric analysis

Phiri,

Moja,

Nkambule

et al. 2024

Heliyon

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“…The crucial aspect is determining the appropriate temperature and duration to produce activated carbon with a significant surface area, sufficient pore formation, and surface functional groups while also maintaining its mechanical stability. Standard activation methods include physical, chemical, and physicochemical activation [ 47 , 71 , 72 , 73 , 74 , 75 ].…”

Section: Preparation Of Lignocellulosic Biomass-derived Biocharmentioning

confidence: 99%

“…In addition, researchers have recently explored the use of non-traditional physical activating agents for the activation of LBC. Hsiao et al [ 72 ] innovatively used soapberry pericarp as the carbon source due to its high content of N and O carbides and employed oyster shell powder as the activating agent ( Figure 7 ). The cost of the physical activation process was reduced by using the CO 2 gas generated from the thermal decomposition of oyster shell powder instead of water vapor, air, and other traditional gases.…”

Section: Preparation Of Lignocellulosic Biomass-derived Biocharmentioning

confidence: 99%

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Recent Advances in the Preparation and Application of Biochar Derived from Lignocellulosic Biomass: A Mini Review

Wang,

Remón,

Jiang

et al. 2024

Polymers

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With the rapid growth in the global population and the accelerating pace of urbanization, researching and developing novel strategies for biomass utilization is significant due to its potential for use in renewable energy, climate change mitigation, waste management, and sustainable agriculture. In this environmental context, this review discusses the recent advances in biomass conversion technologies for biochar production, including the first carbonization process and the subsequent activation methods of the biochar derived from lignocellulosic biomass (LBC). Parallel to this, this review deals with other essential parameters in biochar production, such as feedstock types, reaction environments, and operating conditions in the pyrolysis process, to determine the production and composition of LBC. Moreover, the wide-ranging applications of LBC in areas such as adsorption, catalysts, and energy storage are discussed, offering sustainable and environmentally friendly alternatives while reducing reliance on traditional energy sources and mineral resources, thereby providing practical solutions to environmental and energy challenges. Overall, this review not only provides a comprehensive comparative analysis of different LBC preparation methods, but also facilitates a deeper understanding of the advantages and limitations of these methodologies when it comes to developing high-value materials for sustainable applications.

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“…[5,6] These materials need specific attributes, making activated carbons a favored choice for adsorption due to their high sorption capacity, swift kinetics, lack of toxic by-products, and economical production. [7,8] Activated carbon (biochar) can be produced through either physical or chemical activation. The physical activation method comprises a two-step process.…”

Section: Introductionmentioning

confidence: 99%

Methyl Red Adsorption on Biochar Obtained by Physical Activation of Caraway Seeds with Carbon Dioxide

Paluch,

Bazan‐Wozniak,

Pietrzak

2024

ChemPhysChem

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In this study carbon adsorbents were produced from caraway (Carum carvi L.) seeds, through direct and physical activation by carbon dioxide. The resulting biochar adsorbents were analyzed using low‐temperature nitrogen adsorption‐desorption isotherms and Boehm titration. Furthermore, the acid‐base properties of the biochar samples obtained were examined, and the pH of their aqueous extracts was determined. The obtained adsorbents had a specific surface area ranging between 10 to 70 m2/g. Resulting carbon materials exhibited a predominance of basic groups on their surfaces. The sorption capacities of methyl red for the samples varied from 3 to 20 mg/g. Conducted adsorption studies determined, that the adsorption kinetics of the dye on biochar materials followed a pseudo‐second order model and the adsorption process was best described by the Freundlich isotherm, indicating the development of a multi‐layer adsorbate on their surfaces. The effectiveness of adsorption in aqueous solutions of methyl red increased with the rise in process temperature. Moreover, the adsorption process was found to be spontaneous and endothermic based on thermodynamic investigations.

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Effects of physical and chemical activations on the performance of biochar applied in supercapacitors

Cited by 30 publications

References 42 publications

Utilization of biochar for remediation of heavy metals in aqueous environments: A review and bibliometric analysis

Utilization of biochar for remediation of heavy metals in aqueous environments: A review and bibliometric analysis

Recent Advances in the Preparation and Application of Biochar Derived from Lignocellulosic Biomass: A Mini Review

Methyl Red Adsorption on Biochar Obtained by Physical Activation of Caraway Seeds with Carbon Dioxide

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