Enhancement of the catalytic activity of activated carbons in oxidation reactions by thermal treatment with ammonia or hydrogen cyanide and observation of a superoxide species as a possible intermediate

Stöhr, Brigitte; Boehm, H. P.; Schlögl, Robert

doi:10.1016/0008-6223(91)90006-5

Cited by 473 publications

(308 citation statements)

References 36 publications

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“…Amination significantly increases the amount of nitrogen incorporated into the carbon matrix. This nitrogen fixation comes from the reaction of ammonia with carbon surface oxides to form ammonium salts and amine groups that, upon dehydration and dehydrogenation produce amides, nitriles and pyridine or pyrrole-like functionalities [16,40].…”

Section: Co 2 Capture Testsmentioning

confidence: 99%

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Development of low-cost biomass-based adsorbents for postcombustion CO2 capture

Plaza

Pevida

Arias

et al. 2009

Fuel

191

109

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In this work a series of carbon adsorbents were prepared from a low-cost biomass residue, olive stones. Two different approaches were studied: activation with CO 2 and heat treatment with gaseous ammonia. The results showed that both methods are suitable for the production of adsorbents with a high CO 2 adsorption capacity, and their potential application in VSA or TSA systems for postcombustion CO 2 capture. It was found that the presence of nitrogen functionalities enhances CO 2 adsorption capacity, especially at low partial pressures.

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Section: Co 2 Capture Testsmentioning

confidence: 99%

“…Attention has also been given to the introduction of nitrogen functionalities into the carbon in order to enhance CO 2 adsorption capacity [7][8][9][10][11][12][13]. Other possibilities include the introduction of nitrogen into the carbon matrix by reaction with gaseous ammonia at high temperatures [14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Development of low-cost biomass-based adsorbents for postcombustion CO2 capture

Plaza

Pevida

Arias

et al. 2009

Fuel

191

109

View full text Add to dashboard Cite

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“…When the carbon materials are treated with ammonia at high temperatures, ammonia will decompose to free radicals such as NH 2 , NH, and atomic hydrogen and nitrogen. Those free radicals attack the carbon to form nitrogen-containing groups [3,4].…”

Section: Methodsmentioning

confidence: 99%

“…A number of studies have contributed to understanding the role of the surface chemistry of carbon materials on the final properties of the catalyst, in which emphasis has been mainly concentrated on oxygen surface groups [2]. Carbonnitrogen surface groups have been studied in much less detail and have hardly been exploited for catalyst support applications [3][4][5][6][7][8][9][10]. It is very interesting to study surface nitrogen-containing groups because those groups have a different effect from that of surface oxygen-containing groups.…”

Section: Introductionmentioning

confidence: 99%

Ammonia-treated activated carbon as support of Ru-Ba catalyst for ammonia synthesis

Liang

Wei

Xin

et al. 2004

Reaction Kinetics and Catalysis Letters

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Ammonia-treated activated carbon has been studied as a support of Ru-Ba catalyst for ammonia synthesis. It is shown that the introduction of nitrogen leads to a decrease of ammonia synthesis activity for the catalysts with a low Ba/Ru molar ratio, while no significant changes are obtained for the catalysts with a high Ba/Ru molar ratio, confirming that electronegative impurities suppress the activity in ammonia synthesis and consume part of the promoters.

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“…X-ray photoelectron spectroscopy (XPS) is one of the few methods available to get information on the local bonding environment of nitrogen in carbon materials [19] and, consequently, XPS alone [19][20][21] or in combination with other techniques [2,12,[22][23][24] has been extensively used with this purpose.…”

Section: Concentration and Energy State Of Surface Nitrogen Speciesmentioning

confidence: 99%

N-containing carbons from styrene–divinylbenzene copolymer by urea treatment

Zhuravsky

Кartel

Tarasenko

et al. 2012

Applied Surface Science

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N-containing synthetic carbons with narrow porosity were prepared from a chlorinated styrene and divinylbenzene copolymer by a multistep method with a yield of 34 wt.%.Surface chemical treatment and thermal carbonization of the starting copolymer was monitored by urea impregnation. Steam activation, oxidation and an additional heat treatment gave the final product. The synthesis route was designed in a cost-effective way. The porosity and the concentration of the introduced nitrogen atoms were determined at each step. The final product has a surface area of 1135 m 2 /g. More than 70 % of the pore volume comes from micropores with an average width of 0.7 nm. The 2.3 atomic % surface nitrogen atoms are distributed among five detectable species, of which about 44 % is quaternary nitrogen.

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Enhancement of the catalytic activity of activated carbons in oxidation reactions by thermal treatment with ammonia or hydrogen cyanide and observation of a superoxide species as a possible intermediate

Cited by 473 publications

References 36 publications

Development of low-cost biomass-based adsorbents for postcombustion CO2 capture

Development of low-cost biomass-based adsorbents for postcombustion CO2 capture

Ammonia-treated activated carbon as support of Ru-Ba catalyst for ammonia synthesis

N-containing carbons from styrene–divinylbenzene copolymer by urea treatment

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