Instantaneous Ignition of Activated Carbon

Buettner, Leonard C.; LeDuc, Charles A.; Glover, T. Grant

doi:10.1021/ie502343y

Cited by 10 publications

(5 citation statements)

References 13 publications

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“…While these sorbents are effective in continuous industrial processes, the cost is still too‐often prohibitive in non‐commercial efforts to remediate contaminated ecosystems of large area . Additionally, activated carbon is highly flammable and often requires an oxidant additive (e.g. immobilised sulfur, bromine, or chlorine) to convert mercury metal to an immobilised mercury(II) .…”

Section: Introductionmentioning

confidence: 99%

Laying Waste to Mercury: Inexpensive Sorbents Made from Sulfur and Recycled Cooking Oils

Worthington

Kucera

Albuquerque

et al. 2017

Chemistry A European J

213

286

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Mercury pollution threatens the environment and human health across the globe. This neurotoxic substance is encountered in artisanal gold mining, coal combustion, oil and gas refining, waste incineration, chloralkali plant operation, metallurgy, and areas of agriculture in which mercury‐rich fungicides are used. Thousands of tonnes of mercury are emitted annually through these activities. With the Minamata Convention on Mercury entering force this year, increasing regulation of mercury pollution is imminent. It is therefore critical to provide inexpensive and scalable mercury sorbents. The research herein addresses this need by introducing low‐cost mercury sorbents made solely from sulfur and unsaturated cooking oils. A porous version of the polymer was prepared by simply synthesising the polymer in the presence of a sodium chloride porogen. The resulting material is a rubber that captures liquid mercury metal, mercury vapour, inorganic mercury bound to organic matter, and highly toxic alkylmercury compounds. Mercury removal from air, water and soil was demonstrated. Because sulfur is a by‐product of petroleum refining and spent cooking oils from the food industry are suitable starting materials, these mercury‐capturing polymers can be synthesised entirely from waste and supplied on multi‐kilogram scales. This study is therefore an advance in waste valorisation and environmental chemistry.

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Section: Introductionmentioning

confidence: 99%

Laying Waste to Mercury: Inexpensive Sorbents Made from Sulfur and Recycled Cooking Oils

Worthington

Kucera

Albuquerque

et al. 2017

Chemistry A European J

213

286

View full text Add to dashboard Cite

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“…Finally, the ignition temperature was investigated (see Figure 3c). As can be seen, the activated carbon ignited at 492 • C. This is valuable information from the point of view of coal exploitation [46].…”

Section: Dsc-tga Analysis Of Cherry Pitsmentioning

confidence: 89%

“…As can be seen, the activated carbon ignited at 492 °C. This is valuable information from the point of view of coal exploitation [46].…”

Section: Dsc-tga Analysis Of Cherry Pitsmentioning

confidence: 99%

Recovery of Pd(II) Ions from Aqueous Solutions Using Activated Carbon Obtained in a Single-Stage Synthesis from Cherry Seeds

Michałek

Wojtaszek

Małecki

et al. 2023

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This paper describes a single-stage synthesis process for activated carbon using cherry seeds. The influences of the carbonization temperature and the time were investigated. Using the BET method, the surface area of the obtained activated carbons was determined, as well as the pore distribution, while SEM images provided further insight into the structure of the surface. Next, the adsorption isotherm was derived. For the test, Pd(II) chloride complex ions were used. It was found that the obtained activated carbon were suitable for palladium(II) recovery from diluted aqueous solutions. Out of the tested parameters of carbon synthesis, the most optimal one was found to be 500 °C for 3 h. Additionally, it was confirmed that the increase in the adsorption temperature affects the increase in palladium load from 1.6 mg/g at 20 °C to 15.6 mg/g at 50 °C (for the best-performing sample). This fact may suggest that the process of adsorption is associated with chemical reactions.

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“…Carbon is not temperature stable in ambient atmosphere and may ignite at temperatures above 250 °C. [9] In addition, exposed carbon surfaces are conductive and promote undesired electrolyte decomposition. [1] Therefore, exploring alternative scaffold materials is of interest.…”

Section: Introductionmentioning

confidence: 99%

“…Although this material class shows a promising electrochemical performance for LIB applications, [6,8] some drawbacks exist regarding safety. Carbon is not temperature stable in ambient atmosphere and may ignite at temperatures above 250 °C [9] . In addition, exposed carbon surfaces are conductive and promote undesired electrolyte decomposition [1] .…”

Section: Introductionmentioning

confidence: 99%

Porous MCM‐41 Silica Materials as Scaffolds for Silicon‐based Lithium‐ion Battery Anodes

Karl,

Kalyakina,

Dräger

et al. 2024

ChemElectroChem

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Aiming for specific energy improvements, lithium‐ion battery (LIB) research explores Si based materials as potential alternatives for the negative electrode/anode. Si exhibits a high specific capacity when lithiated, accompanied by a large volumetric expansion. To mitigate expansion induced failures, composite materials with finely distributed Si inside a scaffold have been established. Potential scaffolds to create such Si composites are nano porous SiO2 materials, such as MCM‐41. MCM‐41 exhibits a fine nanostructure, and the synthesis allows precise tuning of the pore properties and thus, after filling with Si, of Si morphology and Si content in the composite. In this work, insights into relevant MCM‐41 synthesis parameters are acquired, with special attention towards specific pore volumes and pore sizes of the SiO2 powders. Materials characterization is performed using nitrogen sorption analysis, X‐ray scattering, electron microscopy and thermogravimetric analysis. Selected MCM‐41 scaffolds are processed to Si composites and integrated into LIB electrodes. The specific capacity and the stability of the Si−SiO2 composites are evaluated by PITT and galvanostatic cycling. They show capacities above 800 mAh g−1, i. e. more than twice the specific capacity of industry standard graphite, and last over 200 charge/discharge cycles before their capacity loss exceeds 25 %.

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Instantaneous Ignition of Activated Carbon

Cited by 10 publications

References 13 publications

Laying Waste to Mercury: Inexpensive Sorbents Made from Sulfur and Recycled Cooking Oils

Laying Waste to Mercury: Inexpensive Sorbents Made from Sulfur and Recycled Cooking Oils

Recovery of Pd(II) Ions from Aqueous Solutions Using Activated Carbon Obtained in a Single-Stage Synthesis from Cherry Seeds

Porous MCM‐41 Silica Materials as Scaffolds for Silicon‐based Lithium‐ion Battery Anodes

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