Effect of Pretreatment on Surface Area, Porosity, and Adsorption Properties of a Carbon Black

Krishnankutty, Nalini; Vannice, M. A.

doi:10.1021/cm00052a022

Cited by 39 publications

(44 citation statements)

References 7 publications

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“…2). In parallel, electrochemical reduction in a basic electrolyte and electrochemical oxidation in [26]. This indicated that the formation surface oxygen groups or graphene layers intercalation by electrolyte ions may be responsible for the observed shift.…”

Section: Resultsmentioning

confidence: 80%

Reduction and oxidation of a Pd/activated carbon catalyst: evaluation of effects

Biniak

Diduszko

Gac

et al. 2010

Reac Kinet Mech Cat

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A commercial Pd/activated carbon catalyst (10%) was treated using several redox processes: reduction with gaseous hydrogen at 140°C, reduction by negative electrochemical polarization in acidic and basic environments, oxidation with aqueous hydrogen peroxide, and positive electrochemical polarization in acidic and basic environments. To establish the electrochemical reduction/oxidation conditions, the potentials of hydrogen and oxygen evolution at Pd/AC powder electrodes were determined from cyclic voltammetric (CV) measurements. The samples were examined for the presence of palladium oxide phases on dispersed metal particles using XRD, TPR, and TPD. The metal oxide phase disappeared following hydrogen and electrochemical reduction. Oxidative treatment of the commercial catalyst differentiated the palladium oxide layers on the metal particle surface. Changes in the surface chemistry of the Pd/PdO/AC system were confirmed by the electrochemical behavior of electrodes prepared from the carbon samples.

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Section: Resultsmentioning

confidence: 80%

Reduction and oxidation of a Pd/activated carbon catalyst: evaluation of effects

Biniak

Diduszko

Gac

et al. 2010

Reac Kinet Mech Cat

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“…[85,95] High-temperature ammonia treatment is one of the representative methods for carbon surface modification, whereby the chemical fixation of amines is carried out at temperatures of 673-1173 K by substitutional exclusion of oxygen-containing groups. [96] From the activated carbons treated by ammonia at high temperatures, Przepiorski identified the presence of CÀN and C=N groups by FTIR spectroscopy. [86] The authors used thermogravimetric analysis (TGA) to compare the CO 2 uptake of pristine activated carbon with those of the carbons prepared by the ammonia treatments at different temperatures and found that there was an optimum temperature for the ammonia treatment, with the sample treated at 673 K exhibiting the highest CO 2 adsorption capacity of 1.73 mmol g À1 at 309 K and 1 bar.…”

Section: Carbon Structural Modification To Improve Adsorption Propertiesmentioning

confidence: 99%

“…[164] Investigations of the basic properties of this metal oxide have been conducted by the use of various techniques, including FTIR, TPD, and molecular modeling of MgÀOÀCO 2 interactions. [65,94,96,[98][99][100][101] FTIR studies of CO 2 adsorption on magnesium oxide surfaces have suggested the formation of different adsorbed complexes including monodentate carbonates, bidentate carbonates, carbonate ions, bicarbonates, and bridging carbonates, depending on the adsorption conditions and the solid surface structure. [165] In an early FTIR study, Whateley determined that CO 2 rapidly chemisorbed both at room temperature and at high temperatures (573 to 773 K), by observing the formation of absorption bands corresponding to various carbonate species.…”

Section: Calcium Oxide Structural Modifications To Improve Adsorbent mentioning

confidence: 99%

Adsorbent Materials for Carbon Dioxide Capture from Large Anthropogenic Point Sources

2009

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Since the time of the industrial revolution, the atmospheric CO(2) concentration has risen by nearly 35 % to its current level of 383 ppm. The increased carbon dioxide concentration in the atmosphere has been suggested to be a leading contributor to global climate change. To slow the increase, reductions in anthropogenic CO(2) emissions are necessary. Large emission point sources, such as fossil-fuel-based power generation facilities, are the first targets for these reductions. A benchmark, mature technology for the separation of dilute CO(2) from gas streams is via absorption with aqueous amines. However, the use of solid adsorbents is now being widely considered as an alternative, potentially less-energy-intensive separation technology. This Review describes the CO(2) adsorption behavior of several different classes of solid carbon dioxide adsorbents, including zeolites, activated carbons, calcium oxides, hydrotalcites, organic-inorganic hybrids, and metal-organic frameworks. These adsorbents are evaluated in terms of their equilibrium CO(2) capacities as well as other important parameters such as adsorption-desorption kinetics, operating windows, stability, and regenerability. The scope of currently available CO(2) adsorbents and their critical properties that will ultimately affect their incorporation into large-scale separation processes is presented.

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“…Figure 2 shows the acid-base surface values of the carbon blacks modified by plasma treatments. The acid-base value on CB-0 (as received) shows that the basal planes of carbon aromatics may function as a slightly increased Lewis base that is capable of complexing protons to its structure (26).…”

Section: Contact Angle Measurementsmentioning

confidence: 99%

Influence of Plasma Treatment on Microstructures and Acid–Base Surface Energetics of Nanostructured Carbon Blacks: N2 Plasma Environment

Park

Kim

2001

Journal of Colloid and Interface Science

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Effect of Pretreatment on Surface Area, Porosity, and Adsorption Properties of a Carbon Black

Cited by 39 publications

References 7 publications

Reduction and oxidation of a Pd/activated carbon catalyst: evaluation of effects

Reduction and oxidation of a Pd/activated carbon catalyst: evaluation of effects

Adsorbent Materials for Carbon Dioxide Capture from Large Anthropogenic Point Sources

Influence of Plasma Treatment on Microstructures and Acid–Base Surface Energetics of Nanostructured Carbon Blacks: N2 Plasma Environment

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