Aerobic Oxidation of Benzyl Alcohol over Activated Carbon Supported Manganese and Vanadium Catalysts: Effect of Surface Oxygen-Containing Groups

Chen, Yuanting; Chen, Wan; Tang, Qinghu; Guo, Zhen; Yang, Yanhui; Su, Fabing

doi:10.1007/s10562-010-0447-4

Cited by 20 publications

(13 citation statements)

References 47 publications

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“…64% of conversion was reached when MnO x /AC (5 wt%) was used as a catalyst. 212 It was found that highly dispersed vanadium species with a distorted tetrahedral coordination were active for oxidation of substituted phenyl alcohols (TOF up to 22 h À1 , based on the molar content of V 2 O 5 ). 204 In addition, selectivity to carbonyl compounds was always more than 99% for all tested phenyl alcohols.…”

Section: Catalysts Design For Aerobic Selective Oxidation Of Alcoholsmentioning

confidence: 99%

“…205 Among various characterization techniques, X-ray absorption spectroscopy (XAS) with synchrotron light source has emerged as a powerful technique to probe the active site in catalysts. 203,204,212,213 X-Ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) provide information about the local coordination and electronic properties of the catalytic active centers. For example, based on the Mn K-edge XANES spectra of manganese oxide standards with different oxidation states (MnO, Mn 3 O 4 , Mn 2 O 3 , MnO 2 and MnOOH), a linear relation was found to give a good match to the set of five experimental edge positions versus oxidation states (as shown in Fig.…”

Section: Catalysts Design For Aerobic Selective Oxidation Of Alcoholsmentioning

confidence: 99%

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Recent advances in heterogeneous selective oxidation catalysis for sustainable chemistry

et al. 2014

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Oxidation catalysis not only plays a crucial role in the current chemical industry for the production of key intermediates such as alcohols, epoxides, aldehydes, ketones and organic acids, but also will contribute to the establishment of novel green and sustainable chemical processes. This review is devoted to dealing with selective oxidation reactions, which are important from the viewpoint of green and sustainable chemistry and still remain challenging. Actually, some well-known highly challenging chemical reactions involve selective oxidation reactions, such as the selective oxidation of methane by oxygen. On the other hand some important oxidation reactions, such as the aerobic oxidation of alcohols in the liquid phase and the preferential oxidation of carbon monoxide in hydrogen, have attracted much attention in recent years because of their high significance in green or energy chemistry. This article summarizes recent advances in the development of new catalytic materials or novel catalytic systems for these challenging oxidation reactions. A deep scientific understanding of the mechanisms, active species and active structures for these systems are also discussed. Furthermore, connections among these distinct catalytic oxidation systems are highlighted, to gain insight for the breakthrough in rational design of efficient catalytic systems for challenging oxidation reactions.

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Section: Catalysts Design For Aerobic Selective Oxidation Of Alcoholsmentioning

confidence: 99%

Section: Catalysts Design For Aerobic Selective Oxidation Of Alcoholsmentioning

confidence: 99%

Recent advances in heterogeneous selective oxidation catalysis for sustainable chemistry

et al. 2014

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“…Vanadium plays important roles in many fields, such as ferrous and nonferrous alloy production [1], thermistors [2], and catalysts [3]. More than 87% of the vanadium resources exist in the form of stone coal in China [4].…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of Vanadium Recovery from Stone Coal by Novel BaCO3/CaO Composite Additive Roasting and Acid Leaching Technology

et al. 2016

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In this report, the vanadium recovery mechanisms by novel BaCO 3 /CaO composite additive roasting and acid leaching technology, including the phase transformations and the vanadium leaching kinetics, were studied. The purpose of this manuscript is to realize and improve the vanadium recovery from stone coal using BaCO 3 /CaO as the composite additive. The results indicated that during the composite additive BaCO 3 /CaO roasting process, the monoclinic crystalline structure of muscovite (K(Al,V) 2 [Si 3 AlO 10 ](OH) 2) was converted into the hexagonal crystalline structure of BaSi 4 O 9 and the tetragonal crystalline structure of Gehlenite (Ca 2 Al 2 SiO 7), which could, therefore, facilitate the release and extraction of vanadium. Vanadium in leaching residue was probably in the form of vanadate or pyrovanadate of barium and calcium, which were hardly extracted during the sulfuric acid leaching process. The vanadium leaching kinetic analysis indicated that the leaching process was controlled by the diffusion through a product layer. The apparent activation energy could be achieved as 46.51 kJ/mol. The reaction order with respect to the sulfuric acid concentration was 1.1059. The kinetic model of vanadium recovery from stone coal using novel composite additive BaCO 3 /CaO could be finally established.

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“…BET surface area of AC (1195 m 2 /g) was investigated by N 2 adsorption/desorption, −196 ∘ C, with particle size ranging from 75 to 106 m. Chen et al have reported that the surface area does not play a major role in catalysis through activated carbon. Although the oxygen containing surface functional group plays a crucial role in catalysis [25]. Figure 3 shows the XRD pattern of AC.…”

Section: Characterization Of the Catalystmentioning

confidence: 99%

Tuning of Activated Carbon for Solvent-Free Oxidation of Cyclohexane

Sadiq

Khan

Numan

et al. 2017

Journal of Chemistry

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Activated carbon (AC) was prepared from carbonization of phosphoric acid soaked peanut shell at 380 ∘ C under inert atmosphere followed by activation with hydrogen peroxide. The AC was characterized by SEM, EDX, FTIR, TGA, and BET surface area and pore size analyzer. The potential of AC as a catalyst for solvent-free oxidation of cyclohexane to cyclohexanol and cyclohexanone (the mixture is known as KA oil) in the presence of molecular oxygen at moderate temperature was investigated in a self-designed double-walled three-necked batch reactor. The effect of different reaction parameters/additive was optimized. The maximum productivity value (2.14 mmolg −1 h −1 , without base, and 4.85 mmolg −1 h −1 , with 0.2 mmol NaOH) of the desired product was achieved under optimal reaction parameters: vol 12.5 mL, cat 0.4 g, time 14 h, oxygen flow 40 mL/min (pO 2 760 Torr), stirring 1100 rpm, and temp 75∘ C. The AC shows recyclability for multiple runs without any significant loss in activity. Thus, the AC can be an efficient catalyst, due to low cost, ease of synthesis, easy recovery, nonleaching, and recyclability for multiple uses for the solvent-free oxidation of cyclohexane.

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Aerobic Oxidation of Benzyl Alcohol over Activated Carbon Supported Manganese and Vanadium Catalysts: Effect of Surface Oxygen-Containing Groups

Cited by 20 publications

References 47 publications

Recent advances in heterogeneous selective oxidation catalysis for sustainable chemistry

Recent advances in heterogeneous selective oxidation catalysis for sustainable chemistry

Mechanisms of Vanadium Recovery from Stone Coal by Novel BaCO3/CaO Composite Additive Roasting and Acid Leaching Technology

Tuning of Activated Carbon for Solvent-Free Oxidation of Cyclohexane

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