Pressurized physical activation: A simple production method for activated carbon with a highly developed pore structure

Yi, Hyeonseok; Nakabayashi, Koji; Yoon, Seong‐Ho; Miyawaki, Jin

doi:10.1016/j.carbon.2021.07.061

Cited by 55 publications

(23 citation statements)

References 41 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, 1,2 controllable physicochemical structure, 3,4 excellent stability, and environment-friendliness. 5−7 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.…”

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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“…Pressurization enhanced the diffusibility of the activation agent (CO 2 gas) into carbon particles and induced the development of inter-microdomain pores. 15 Therefore, it was confirmed that the pressurized physical activation gave rise to the well-developed and unique pore structures between the atmospheric pressure physical activation and chemical activation methods.…”

Section: Resultsmentioning

confidence: 85%

“…As reported in our previous works, inter-microdomain boundary suggests a development of inter-microdomain pores. 15,20 PAC showed connected or unclear microdomain boundary. In contrast, PPAC and CAC showed clear inter-microdomain boundary.…”

Section: Resultsmentioning

confidence: 98%

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Study on the applicability of pressurized physically activated carbon as an adsorbent in adsorption heat pumps

Nakabayashi

Yoon

et al. 2022

RSC Adv.

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“…The common way to activate biowaste-based carbon is after carbonization, although in certain cases the activation is carried out before. This can be physical (e.g., pressurization, pyrolysis, or gasification) and/or chemical (e.g., by using acid, alkali, or salt compounds) depending on the nature of the waste and its further application [34][35][36].…”

Section: Activated Carbon Productionmentioning

confidence: 99%

Development and Characterization of Bioadsorbents Derived from Different Agricultural Wastes for Water Reclamation: A Review

et al. 2022

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The presence of dangerous pollutants in different water sources has restricted the availability of this natural resource. Thus, the development of new low-cost and environmentally-friendly technologies is currently required to ensure access to clean water. Various approaches to the recovery of contaminated water have been considered, including the generation of biomaterials with adsorption capacity for dangerous compounds. Research on bioadsorbents has boomed in recent years, as they constitute one of the most sustainable options for water treatment thanks to their abundance and high cellulose content. Thanks to the vast amount of information published to date, the present review addresses the current status of different biosorbents and the principal processes and characterization methods involved, focusing on base biomaterials such as fruits and vegetables, grains and seeds, and herbage and forage. In comparison to other reviews, this work reports more than 60 adsorbents obtained from agricultural wastes. The removal efficiencies and/or maximum adsorption capacities for heavy metals, industrial contaminants, nutrients and pharmaceuticals are presented as well. In addition to the valuable information provided in the literature investigation, challenges and perspectives concerning the implementation of bioadsorbents are discussed in order to comprehensively guide selection of the most suitable biomaterials according to the target contaminant and the available biowastes.

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Pressurized physical activation: A simple production method for activated carbon with a highly developed pore structure

Cited by 55 publications

References 41 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

Study on the applicability of pressurized physically activated carbon as an adsorbent in adsorption heat pumps

Development and Characterization of Bioadsorbents Derived from Different Agricultural Wastes for Water Reclamation: A Review

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