Journal ArticleDOI
Activated Carbon from Macadamia Nut Shell by Air Oxidation in Boiling Water
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TLDR
In this article, a high yield activated carbon is produced from macadamia nut shell charcoal by carbonization of the charcoal at 1173 K, air oxidation of the carbonized charcoal in boiling water (AOBW), and activation (a second carbonization) of the oxygenated carbon.Abstract:
A high-yield activated carbon is produced from macadamia nut shell charcoal by (i) carbonization of the charcoal at 1173 K, (ii) air oxidation of the carbonized charcoal in boiling water (AOBW) at 503−553 K, and (iii) activation (a second carbonization) of the oxygenated carbon. In step ii, air is bubbled through a sparger to maintain a relatively high concentration of dissolved oxygen in the water, and the boiling water serves to control the temperature of the carbon during its gasification by the dissolved oxygen. Carbon dioxide is observed to be the only gaseous product of the oxidation chemistry. The oxidation results and the properties of the activated carbons from AOBW are similar to those obtained by controlled atmospheric air oxidation. However, the rate of CO2 formation is observed to increase with time to a plateau for AOBW, whereas the gasification rate decreases with time for atmospheric air oxidation. Multiple cycles, involving AOBW followed by activation, efficiently increase the specific su...read more
Citations
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The Art, Science, and Technology of Charcoal Production†
TL;DR: In this article, the authors summarize the knowledge of the production and properties of charcoal that has been accumulated over the past 38 millenia and summarize the potential of charcoal as a renewable fuel.
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Activated Carbons Developed from a Rapidly Renewable Biosource for Removal of Cadmium(II) and Nickel(II) Ions from Dilute Aqueous Solutions
TL;DR: Canes from Arundo donax, a rapid growing plant, were converted to activated carbons by phosphoric acid activation under four different activation atmospheres, to develop carbons with substantial capability to adsorb CdII and Ni(II) ions from dilute aqueous solutions as mentioned in this paper.
Journal ArticleDOI
Electrical and Physical Properties of Carbonized Charcoals
Kazuhiro Mochidzuki,Florence Soutric,Katsuaki Tadokoro,Michael Jerry Antal,Mária Tóth,Borbála Zelei,Gábor Várhegyi +6 more
TL;DR: In this paper, a packed bed of carbonized charcoal particles subject to a compressive pressure (ca. 8 MPa) was shown to be a good electrical conductor (σ < 0.2 Ω·cm), and the 5 orders of magnitude decrease in the electrical resistivity of charcoal with increasing heat treatment temperature (HTT) was not associated with any dramatic change in the carbons' X-ray diffraction spectrum, its Fourier transform infrared spectrum, or its elemental analysis.
Journal ArticleDOI
Performance of a First-Generation, Aqueous-Alkaline Biocarbon Fuel Cell
Teppei Nunoura,Teppei Nunoura,Kiyoshi Dowaki,Chihiro Fushimi,Stephen Glen Allen,Stephen Glen Allen,Erika Mészáros,Michael Jerry Antal +7 more
TL;DR: In this article, the authors describe the performance of an aqueous-alkaline biocarbon fuel cell that generates power at temperatures of ∼500 K. This was achieved using a 6 M KO.
Journal ArticleDOI
Biochar from pyrolysis of cellulose: An alternative catalyst support for the electro-oxidation of methanol
María Luz Nieva Lobos,María Luz Nieva Lobos,Juan Manuel Sieben,Vanina Comignani,Marta María Elena Duarte,María Alicia Volpe,Elizabeth L. Moyano +6 more
TL;DR: In this article, the biochar produced by fast pyrolysis at 350°C of untreated and acid-treated cellulose is evaluated as supports of Cu Ru@Pt core-shell nanoparticles (2.9−3.5nm) for the electro-oxidation of methanol in acid media.
References
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