Efficient carbon-based acid catalysts for the propan-2-ol dehydration

Diyuk, Vitaliy E.; Zaderko, Alexander N.; Grishchenko, Liudmyla M.; Yatsymyrskiy, Andrii V.; Lisnyak, Vladyslav V.

doi:10.1016/j.catcom.2012.06.018

Cited by 31 publications

(5 citation statements)

References 17 publications

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“…24 The higher density of ASO 3 H groups 25 on catalyst surface, the higher yield of 26 TAME. 27 Oxygen functional groups have a 28 negative effect on the yield of TAME.…”

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confidence: 97%

“…Galán et al [33] and it has been previously reported [34]. Briefly, 172 the initial material (ash wood) was mechanically crushed to the The procedure of the reaction was a modified version of that 196 proposed by Diyuk et al [26]. Activated carbon (7 g) was immersed 197 in a bromine aqueous solution ( In order to introduce sulphonic groups on the activated carbon 218 surface via in situ generated diazonium cation two methods were 219 applied.…”

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confidence: 99%

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Synthesis of tert -amyl methyl ether (TAME) over modified activated carbon catalysts

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Malaika

Kozłowski

2015

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“…24 The higher density of ASO 3 H groups 25 on catalyst surface, the higher yield of 26 TAME. 27 Oxygen functional groups have a 28 negative effect on the yield of TAME.…”

mentioning

confidence: 97%

mentioning

confidence: 99%

Synthesis of tert -amyl methyl ether (TAME) over modified activated carbon catalysts

Rechnia

Malaika

Kozłowski

2015

Fuel

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“…FTIR spectra of the oxidized and aminated AC sorbents showed a significant amount of all types of O-containing groups. These groups are products of the parallel oxidation of carbon surface and hydrolysis of the most reactive halogen-containing groups [19,20]. Figure 2b confirms the presence of diethylamine groups for all the aminated SCN samples.…”

Section: Methodsmentioning

confidence: 60%

CO₂ adsorption on pristine, oxidized, and diethylamine-functionalized activated carbon sorbents

et al. 2020

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Adsorption is currently the most promising capture technology to shorten atmospheric emissions of carbon dioxide (CO2). In this article, we report on the adsorption of CO2 onto pristine, oxidized, and aminated activated carbon (AC) sorbents. From our findings, some functionalized AC sorbents have shown very promising results in the CO2 capture process. Their maximum adsorption capacity measured by the thermogravimetric method at 20 °C varies between 2.2 and 3.9 mmol CO2/g depending on the content of diethylamino and oxygen-containing groups. The functionalization of the carbon surface with diethylamino groups improves the adsorption capacity by 30-40%. The CO2 adsorption little depends on the texture parameters of the pristine AC sorbents. In the range from 20 to 100 °C, the CO2 thermodesorption showed the effective regeneration of the sorbents. The aminated carbon surface demonstrates the best CO2 adsorption but binds the adsorbed molecules stronger than the oxidized surface, which limits the sorbent regeneration.

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“…The concentration of the surface oxygencontaining groups ( B ) was measured by the Boehm titration [23,24]. The concentration ( TPD ) and thermal stability of oxygen-containing surface groups were determined by the thermogravimetry-thermoprogrammed desorption method with IR registration of desorbed products (TG-TPD-IR), as reported in [25,26]. In a typical experiment, the carbon sample (0.1 g) was heated from 20 to 900 ∘ С in a flow of Ar of 50 ml/min.…”

Section: Methodsmentioning

confidence: 99%

Correlation of the Photoinduced Total Transmission with the Degree of Surface Functionalization of Carbon Materials Obtained from Natural Renewable Sources

et al. 2016

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For the first time, a contactless express method, which is based on the self-action of picosecond range laser pulses at 1064 nm, is used for the characterization of an optically dense porous layer of carbon material (CM) bulk particles obtained from a lignocellulosic source. It is found that the oxidation treatment reduces the Brunauer-Emmett-Teller ( BET) surface area from 9.52 × 10 5 m 2 /kg to 2.73 × 10 5 m 2 /kg. This reduction occurs due to the destruction of the carbon matrix fraction and to the formation of novel O-containing surface groups. The concentrated 30-mass% HNO3 is found to be the most efficient oxidant giving the highest yield of carboxylic (Cb), anhydridic, lactonic, and phenolic surface functionalities. The concentration of the surface functional groups is determined in a dynamic argon atmosphere by thermogravimetric (TG) analysis and thermoprogrammed desorption coupled with IR (TPD-IR) spectroscopy. The surface acidity defined from data of the Boehm titration shows the acceptable agreement with the data of TG-TPD-IR examination. An enhancement of the surface hydrophilicity allows the use of carbon matrix for the covalent binding of bioligands, amino acids, their residues, and proteins to the oxygen-containing functionalities, such as Cb groups. The observed photoinduced absorption efficiency of the bulk carbon particles Im( (3) C ) ∼ 10 −16 m 2 /W is in the range of that of nanosized carbons. A slight variation of the ratio Im( (3) C )/ BET within the limits of experimental errors indicates a certain correlation between the absorptive NLO response and the CM specific surface. We suggest to utilize Im( (3) C ) as a quality parameter for carbon materials subjected to the oxidation, which is a typical initial step of the most commonly used functionalization routes for the preparation of biomedical materials.

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Efficient carbon-based acid catalysts for the propan-2-ol dehydration

Cited by 31 publications

References 17 publications

Synthesis of tert -amyl methyl ether (TAME) over modified activated carbon catalysts

Synthesis of tert -amyl methyl ether (TAME) over modified activated carbon catalysts

CO₂ adsorption on pristine, oxidized, and diethylamine-functionalized activated carbon sorbents

Correlation of the Photoinduced Total Transmission with the Degree of Surface Functionalization of Carbon Materials Obtained from Natural Renewable Sources

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Efficient carbon-based acid catalysts for the propan-2-ol dehydration

Cited by 31 publications

References 17 publications

Synthesis of tert -amyl methyl ether (TAME) over modified activated carbon catalysts

Synthesis of tert -amyl methyl ether (TAME) over modified activated carbon catalysts

CO2 adsorption on pristine, oxidized, and diethylamine-functionalized activated carbon sorbents

Correlation of the Photoinduced Total Transmission with the Degree of Surface Functionalization of Carbon Materials Obtained from Natural Renewable Sources

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Product

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CO₂ adsorption on pristine, oxidized, and diethylamine-functionalized activated carbon sorbents