Activation of biomass (cola nut shell) with KOH and K2C2O4: The distinct influence on evolution of volatiles and pore structures of activated carbon

Kontchouo, Félix Mérimé Bkangmo; Jiang, Yuchen; Liang, Jingyi; Fan, Mengjiao; Shao, Yuewen; Zhang, Lijun; Zhang, Shu; Hu, Xun

doi:10.1016/j.joei.2023.101288

Cited by 10 publications

(8 citation statements)

References 33 publications

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“…Blanchard et al used awater bottle as the raw material to produce the derived carbon with a specific surface area of 1124 m 2 /g . Bkangmo Kontchouo et al used cola nut shell as the raw material to produce the derived carbon with a specific surface area of 1376 m 2 /g . Liu et al applied eggplant as raw material to manufacture derivative carbon, with a specific surface area of 516 m 2 /g .…”

Section: Results and Discussionmentioning

confidence: 99%

Three-Dimensional Porous Carbon Material Derived from Moldy Rice Noodles for Highly Efficient Removal of Methylene Blue Dye

Wang,

Liu,

Yuan

et al. 2024

ACS Sustainable Resour. Manage.

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Methylene blue (MB) is a water-soluble organic compound with a complex chemical structure and stable properties, which is difficult to remove. In this work, a high specific surface area MB dye adsorbent of 3D hierarchical porous derived carbon was obtained from moldy rice noodles (RN) through high-temperature carbonization and strong alkali etching. The morphology and structural properties, pore structure, specific surface area, and crystallinity of RN carbon (RNC) are analyzed. The adsorption properties of RNC for MB dye molecules are studied, including the influence of different activator (KOH) ratios, the influence of initial concentration of dye, and the influence of adsorption kinetics and thermodynamics on the adsorption of dye. The results show that the optimal ratio of RN to activator is 1:2 (RNC-2), and its specific surface area is the highest, reaching 1693.31 m 2 /g. At 298 K, the maximum theoretical adsorption capacity of RNC-2 is 626.25 mg/g, and at 333 K, the maximum theoretical adsorption capacity is 827.34 mg/g. This work shows that the derived carbon material obtained from moldy RN is a kind of adsorbent material with excellent properties and has a great application prospect in purifying industrial wastewater. This work also means that moldy RN can be recycled rather than discarded. In addition, this material can also be used in fields such as energy storage and catalysis in the future.

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Section: Results and Discussionmentioning

confidence: 99%

Three-Dimensional Porous Carbon Material Derived from Moldy Rice Noodles for Highly Efficient Removal of Methylene Blue Dye

Wang,

Liu,

Yuan

et al. 2024

ACS Sustainable Resour. Manage.

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“…Table shows the yields of the pyrolytic products from the activation of FS or impregnated FS and the hydrochars from HTC with K 2 C 2 O 4 at 800 °C. K 2 C 2 O 4 activator could effectually catalyze the cracking of the organics in the FS, forming more gaseous products than volatiles . The impregnation of the FS with the bio-oil improved the production of bio-oil as some organics in the impregnated bio-oil were evaporated.…”

Section: Resultsmentioning

confidence: 99%

“…The absorbance of the samples was used to measure the concentration using the calibration curve developed via Beer–Lambert’s law (Figure S2). The adsorption amount was calculated by using eq , while the removal rate was calculated by eq qe = false( C o − C e false) × V / m R false( % false) = false( C o − C e false) / C normalo × 100 where qe is the adsorption amount (mg/g), R is the removal rate (%).…”

Section: Methodsmentioning

confidence: 99%

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Cross-Interaction of Fish Scales and Poplar-Derived Bio-oil Enhance Pore Development via Carbonization and Activation

Kousar,

Fan,

et al. 2024

ACS Sustainable Resour. Manage.

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Fish scales (FS) are not only a kitchen waste but can also serve as a resource when used as a precursor for the production of activated carbon. However, pore development in activated carbon derived from the FS could be hindered by the excessive cracking of the thermally unstable collagens and fats in FS. Herein, an approach of impregnating FS with bio-oil, before being activated with K 2 C 2 O 4 at 800 °C, was executed, aiming to increase the activated carbon yield, tailor the porous structures of activated carbon, and find another outlet for application of bio-oil. The results confirmed that the formation of activated carbon was diminished due to the extreme conversion of proteins/fats to gaseous products during FS activation. Cross-interactions between organics in the bio-oil for impregnation with proteins in FS led to a doubling of the yield of activated carbon and also increased the carbon content in activated carbon (from 46.2% in the control sample to 62.0%) due to the formation of organics with higher resistance to conversion to gaseous products. Besides, more developed pore structures (more mesopores: 22.3% versus 12.0%) were generated through bio-oil impregnation (1349.3 m 2 /g versus 1206.3 m 2 /g in the control sample). In-situ IR characterization indicated the formation of pores via cracking of aliphatic structures in FS. Bio-oil impregnation formed more aliphatic structures and destroyed strong hydrogen bonds in FS, generating more developed pore structures. Additionally, hydrothermal carbonization (HTC) of FS led to substantial leaching of organics to the extent of generation of almost no pores from activation of the resulting hydrochar. The co-HTC of FS with bio-oil can induce the transfer of organics present in bio-oil to FS, facilitating pore development.

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“…They also reported that compared to KOH, K 2 C 2 O 4 could facilitate the development of more sub-micropores (<1 nm). In a recent study conducted by Kontchouo et al 20 the impacts of different chemical activating agents, specifically KOH and K 2 C 2 O 4 , on the evolution of pyrolytic products and the generation of pores during the activation process of cola nut shells were compared. The researchers found that K 2 C 2 O 4 exhibited higher activity for creating pores, particularly at lower temperatures ( e.g.…”

Section: Introductionmentioning

confidence: 99%

Valorization of waste coffee grounds into microporous carbon materials for CO₂ adsorption

Kim,

Lee,

Park

2024

Green Chem.

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Activation of biomass (cola nut shell) with KOH and K2C2O4: The distinct influence on evolution of volatiles and pore structures of activated carbon

Cited by 10 publications

References 33 publications

Three-Dimensional Porous Carbon Material Derived from Moldy Rice Noodles for Highly Efficient Removal of Methylene Blue Dye

Three-Dimensional Porous Carbon Material Derived from Moldy Rice Noodles for Highly Efficient Removal of Methylene Blue Dye

Cross-Interaction of Fish Scales and Poplar-Derived Bio-oil Enhance Pore Development via Carbonization and Activation

Valorization of waste coffee grounds into microporous carbon materials for CO₂ adsorption

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Activation of biomass (cola nut shell) with KOH and K2C2O4: The distinct influence on evolution of volatiles and pore structures of activated carbon

Cited by 10 publications

References 33 publications

Three-Dimensional Porous Carbon Material Derived from Moldy Rice Noodles for Highly Efficient Removal of Methylene Blue Dye

Three-Dimensional Porous Carbon Material Derived from Moldy Rice Noodles for Highly Efficient Removal of Methylene Blue Dye

Cross-Interaction of Fish Scales and Poplar-Derived Bio-oil Enhance Pore Development via Carbonization and Activation

Valorization of waste coffee grounds into microporous carbon materials for CO2 adsorption

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Valorization of waste coffee grounds into microporous carbon materials for CO₂ adsorption