Progress on fabrication and application of activated carbon sphere in recent decade

Lan, Jingming; Wang, Baoying; Bo, Chunmiao; Gong, Bolin; Ou, Junjie

doi:10.1016/j.jiec.2022.12.045

Cited by 41 publications

(19 citation statements)

References 166 publications

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“…The second step involves modifying the material through physical or chemical methods to increase its surface area and create more active sites. This process is known as activation. , Figure shows a detailed scheme of activated carbon preparation. The diameter of micropores on AC’s surface ranges between 2 and 50 nm, and it has a surface area of around 500 to 1500 m 2 g –1 .…”

Section: Porous Carbons For Carbon Capturementioning

confidence: 99%

Recent Progress on Porous Carbons for Carbon Capture

Wen,

Li,

Liang

et al. 2024

Langmuir

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High emission of carbon dioxide (CO 2 ) has caused CO 2 levels to reach more than 400 ppm in air and led to a serious climate problem. In addition, in confined spaces such as submarines and aircraft, the CO 2 concentration increase in the air caused by human respiration also affects human health. In order to protect the environment and human health, the search for highperformance adsorbents for carbon capture from high and low concentration gas is particularly important. Porous carbon materials, possessing the advantages of low cost and renewability, have set off a boom in the research of porous adsorbents, which have the opportunity to be utilized on a large scale for industrial carbon capture in the future. In this review, we summarize the recent research progress of porous carbons for carbon capture from flue gas and directly from air in the last five years, including activated carbon (AC), heteroatom-modified porous carbon, carbon molecular sieves (CMS), and other porous carbon materials, with a focus on the effects of temperature, water content, and gas flow rate of industrial flue gas on the performance of porous carbon adsorbents. We summarize the preparation strategies of various porous carbons and seek environmental friendly porous carbon materials preparation strategies under the premise of improving the CO 2 adsorption capacity and selectivity of porous carbon adsorbents. Based on the effects of real industrial flue gas on adsorbents, we provide new ideas and evaluation methods for the development and preparation of porous carbon materials.

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Section: Porous Carbons For Carbon Capturementioning

confidence: 99%

Recent Progress on Porous Carbons for Carbon Capture

Wen,

Li,

Liang

et al. 2024

Langmuir

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“…4 The latter area is intensively growing as CMs have been shown to be excellent sorbents for pollutants or contaminants in liquids and gases. ACs dominate the field due to their economic synthesis methods and high efficiency for desired purposes 5 and have been used to capture CO 2 , 6 heavy metal ions, 7 organic contaminants, 7,8 and various others.…”

Section: ■ Introductionmentioning

confidence: 99%

Kraft Lignin-Derived Microporous Nitrogen-Doped Carbon Adsorbent for Air and Water Purification

Tkachenko,

Nikolaichuk,

Fihurka

et al. 2024

ACS Appl. Mater. Interfaces

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The study presents a streamlined one-step process for producing highly porous, metal-free, N-doped activated carbon (N-AC) for CO2 capture and herbicide removal from simulated industrially polluted and real environmental systems. N-AC was prepared from kraft lignina carbon-rich and abundant byproduct of the pulp industry, using nitric acid as the activator and urea as the N-dopant. The reported carbonization process under a nitrogen atmosphere renders a product with a high yield of 30% even at high temperatures up to 800 °C. N-AC exhibited a substantial high N content (4–5%), the presence of aliphatic and phenolic OH groups, and a notable absence of carboxylic groups, as confirmed by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and Boehm’s titration. Porosity analysis indicated that micropores constituted the majority of the pore structure, with 86% of pores having diameters less than 0.6 nm. According to BET adsorption analysis, the developed porous structure of N-AC boasted a substantial specific surface area of 1000 m2 g–1. N-AC proved to be a promising adsorbent for air and water purification. Specifically, N-AC exhibited a strong affinity for CO2, with an adsorption capacity of 1.4 mmol g–1 at 0.15 bar and 20 °C, and it demonstrated the highest selectivity over N2 from the simulated flue gas system (27.3 mmol g–1 for 15:85 v/v CO2/N2 at 20 °C) among all previously reported nitrogen-doped AC materials from kraft lignin. Moreover, N-AC displayed excellent reusability and efficient CO2 release, maintaining an adsorption capacity of 3.1 mmol g–1 (at 1 bar and 25 °C) over 10 consecutive adsorption–desorption cycles, confirming N-AC as a useful material for CO2 storage and utilization. The unique cationic nature of N-AC enhanced the adsorption of herbicides in neutral and weakly basic environments, which is relevant for real waters. It exhibited an impressive adsorption capacity for the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) at 96 ± 6 mg g–1 under pH 6 and 25 °C according to the Langmuir–Freundlich model. Notably, N-AC preserves its high adsorption capacity toward 2,4-D from simulated groundwater and runoff from tomato greenhouse, while performance in real samples from Fyris river in Uppsala, Sweden, causes a decrease of only 4–5%. Owing to the one-step process, high yield, annual abundance of kraft lignin, and use of environmentally friendly activating agents, N-AC has substantial potential for large-scale industrial applications.

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“…22 Activated carbon synthesized from lignocellulosic material is also very well-suited for environmental applications because of its low toxicity. 23 The primary components of plant lignocellulosic biomass are cellulose, hemicellulose, and lignin. Lignin, due to its abundance, various functional groups such as methoxy, phenolic and aliphatic hydroxyl, and carbonyl, and desirable properties like higher carbon content, degradability, renewability, safety, and cost effectiveness, stands out as a remarkably versatile material.…”

Section: Introductionmentioning

confidence: 99%