Analysis of factors influencing pore structure development of agricultural and forestry waste-derived activated carbon for adsorption application in gas and liquid phases: A review

Zhu, Rong; Yu, Qiongfen; Li, Ming; Zhao, Hong; Jin, Shaoxuan; Huang, Yao-Wei; Fan, Jie; Chen, Jie

doi:10.1016/j.jece.2021.105905

Cited by 39 publications

(20 citation statements)

References 219 publications

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“…Activated coke derived from heavy carbon resources (such as coal and biomass) is widely applied in energy storage, chemical production, and pollutant removal due to its advantages of low preparation cost, , controllable physicochemical structure, , excellent stability, and environment-friendliness. − Improving reactivity toward adsorption and catalysis is an important demand for practical application of activated coke, which requires both abundant active sites/spaces and smooth channels for transportation. − Among various structure modification strategies, the regulation of porous structure has been proved to be efficient for simultaneously improving adsorption/catalysis activity and transportation ability. , Specifically, it is known that micropore in activated coke usually possesses high reactivity for adsorption as well as catalysis due to unique confinement effect, and meso-/macropore is beneficial for diffusion and transportation. , In the line of this thought, high-performance activated coke needs a hierarchically porous structure consisting of both micropore and meso-/macropore. In terms of pollutant removal, it has been reported that hierarchically porous activated coke (HPAC) with co-existing micropore and mesopore shows superior performance compared with traditional microporous activated coke .…”

Section: Introductionmentioning

confidence: 99%

One-Step Catalytic Activation Promoting Pore Development of Zhundong Coal-Based Activated Coke: A Compared Study with Conventional Carbonization–Activation Combined Process

Chen

Sun

et al. 2022

Energy Fuels

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Hierarchically porous activated coke is widely applied in pollutant removal due to its excellent molecule adsorption and transportation ability. Catalytic activation with the participation of alkali/alkaline earth metal salt has been reported to be effective for constructing hierarchical pore configuration; however, the technical condition remains to be explored for providing guidance to practical preparation process. Herein, the relationship between the porous structure of Zhundong coal-based activated coke and the technical condition during catalytic activation is systematically discussed. Based on comparisons of porous structures obtained under different carbonization−activation conditions, one-step catalytic activation is demonstrated to be more favorable for pore development than traditional carbonization−activation process. Physicochemical structural analyses of the precursor and the prepared activated coke reveal that pore development during catalytic activation is also related to the surface chemistry of the precursor and particle size. Amplified preparation experiments in rotary kiln further verify the potential of one-step catalytic activation in industrial production. As a proof of application, selective catalytic reduction tests show that the prepared hierarchically porous activated coke via one-step catalytic activation exhibits high efficiency in NO removal. This work highlights the promoting role of one-step catalytic activation in pore development, providing guidance for preparing high-performance activated coke under practical industrial conditions.

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Section: Introductionmentioning

confidence: 99%

One-Step Catalytic Activation Promoting Pore Development of Zhundong Coal-Based Activated Coke: A Compared Study with Conventional Carbonization–Activation Combined Process

Chen

Sun

et al. 2022

Energy Fuels

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“…The FTIR spectra shown in Figure 3 show a set of characteristic bands present on the ACs prepared from lignocellulosic precursors, by chemical activation with KOH and K 2 CO 3 [ 36 ]. The spectra of the four ACs seem similar, but on both ACs prepared with a ratio of 1:2 for the activating agent and precursor (Teak-KOH-1:2-700 and Teak-K 2 CO 3 -1:2-700), the presence of two bands around 3400 cm −1 , and between 2800 and 3000 cm −1 , stand out.…”

Section: Resultsmentioning

confidence: 99%

Using Tectona Grandis Biomass to Produce Valuable Adsorbents for Pesticide Removal from Liquid Effluent

2022

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This work presents a first approach concerning the valorization of Tectona Grandis tree by-products, from East Timor through their transformation into high activated carbon (AC) by chemical activation with KOH and K2CO3. The better ACs, Teak-KOH-1-1-700 and Teak-K2CO3-1-2-700, presented a high ABET (995 and 1132 m2·g−1) and micropore volume (0.43 and 0.5 cm3·g−1), respectively. Both ACs were tested on the removal of four pesticides, from the liquid phase. Both ACs performed better than existing commercial types, presenting a maximum adsorption capacity of 1.88, 1.67, 1.10 and 0.89 mmol·g−1, for 4-chloro-2-methylphenoxyacetic acid, 2,4-dichlorophenoxyacetic acid, diuron and atrazine, respectively. Pesticide adsorption from diluted and concentrated solutions confirms that diffusion is the limiting factor. The possibility of implementing a production unit for ACs in East Timor is very promising for that country. It presents an opportunity for job creation, biomass waste reduction and a contribution to environmental sustainability, thereby following the principles of a circular economy.

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“…The template method and the molten salt method are common methods for preparing porous materials [14][15][16][17]. The traditional activation method could generate new pores and further expand existing ones, ultimately increasing the specific surface area of the material [18]. However, these methods all require the introduction of additional substances during heat treatment to achieve pore structure regulation.…”

Section: Introductionmentioning

confidence: 99%

Modulating the Graphitic Domains and Pore Structure of Corncob-Derived Hard Carbons by Pyrolysis to Improve Sodium Storage

Song

Guo

et al. 2023

Molecules

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Biomass-derived hard carbon materials are considered as the most promising anode materials for sodium-ion batteries (SIBs) due to their abundant sources, environmental friendliness, and excellent electrochemical performance. Although much research exists on the effect of pyrolysis temperature on the microstructure of hard carbon materials, there are few reports that focus on the development of pore structure during the pyrolysis process. In this study, corncob is used as the raw material to synthesize hard carbon at a pyrolysis temperature of 1000~1600 °C, and their interrelationationship between pyrolysis temperature, microstructure and sodium storage properties are systematically studied. With the pyrolysis temperature increasing from 1000 °C to 1400 °C, the number of graphite microcrystal layers increases, the long-range order degree rises, and the pore structure shows a larger size and wide distribution. The specific capacity, the initial coulomb efficiency, and the rate performance of hard carbon materials improve simultaneously. However, as the pyrolysis temperature rises further to 1600 °C, the graphite-like layer begins to curl, and the number of graphite microcrystal layers reduces. In return, the electrochemical performance of the hard carbon material decreases. This model of pyrolysis temperatures–microstructure–sodium storage properties will provide a theoretical basis for the research and application of biomass hard carbon materials in SIBs.

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Analysis of factors influencing pore structure development of agricultural and forestry waste-derived activated carbon for adsorption application in gas and liquid phases: A review

Cited by 39 publications

References 219 publications

One-Step Catalytic Activation Promoting Pore Development of Zhundong Coal-Based Activated Coke: A Compared Study with Conventional Carbonization–Activation Combined Process

One-Step Catalytic Activation Promoting Pore Development of Zhundong Coal-Based Activated Coke: A Compared Study with Conventional Carbonization–Activation Combined Process

Using Tectona Grandis Biomass to Produce Valuable Adsorbents for Pesticide Removal from Liquid Effluent

Modulating the Graphitic Domains and Pore Structure of Corncob-Derived Hard Carbons by Pyrolysis to Improve Sodium Storage

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