The Role of Chemisorbed Oxygen on Diamond Surfaces for the Dehydrogenation of Ethane in the Presence of Carbon Dioxide

Nakagawa, Kiyoharu; Kajita, Chiaki; Ikenaga, Naoki; Suzuki, Toshimitsu; Kobayashi, Tetsuhiko; Nishitani‐Gamo, Mikka; Ando, Toshihiro

doi:10.1021/jp022173b

Cited by 67 publications

(47 citation statements)

References 30 publications

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“…This reaction exhibited obvious advantage compared to the oxidative dehydrogenation of ethane with O 2 , which had been demonstrated by many researchers [1][2][3][4]. Up to now, metal oxides [1,5], Cr-MSU-x [6], Cr/SBA-15/Al 2 O 3 /FeCrAl [7], Cr/SiO 2 [3,8], Ga/TiO 2 [9], Co-CaCO 3 [10], Cr/diamond [11], Cr/H-ZSM-5 [4], CaO-CeO 2 [2,12], Fe-Mn/Si-2 [13] and Mo 2 C/SiO 2 [14] have been used as catalysts for the dehydrogenation of ethane with CO 2 as an oxidant. Among these catalysts, Cr-based catalysts showed excellent performances for this reaction.…”

Section: Introductionmentioning

confidence: 89%

Characterizations and Catalytic Properties of Chromium Silicalite-2 Prepared by Direct Hydrothermal Synthesis and Impregnation

Zhao

Wang

2010

Catal Lett

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A series of Cr-Si-2 molecular sieves have been prepared by direct hydrothermal synthesis using tetrabutylammonium hydroxide as a template. Cr/Si-2 was also prepared by conventional impregnation. The synthesized materials were characterized by X-ray diffraction (XRD), N 2 adsorption (-196°C), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and diffuse reflectance (UV-vis) spectroscopic measurements. Cr-Si-2 sample with lower content of chromium (ca.

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Section: Introductionmentioning

confidence: 89%

Characterizations and Catalytic Properties of Chromium Silicalite-2 Prepared by Direct Hydrothermal Synthesis and Impregnation

Zhao

Wang

2010

Catal Lett

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“…Strong acid-base pairs are reported to promote the reforming and cracking reactions 36) . We have reported that the use of CO2 as an oxidant promotes the ODHE over Ga2O3-loaded TiO2 37) and Cr2O3-loaded oxidized diamond catalysts 38) . However, with an increase in the reaction time, the ethene yield decreases due to carbon deposition.…”

Section: Supported Moo3 Catalysts Have Been Investigated 15)～17)mentioning

confidence: 97%

Oxidative Dehydrogenation of Ethane over NiO-loaded High Surface Area ZrO<sub>2</sub> Catalysts

Sakitani

Nakamura

Ikenaga

et al. 2010

J. Jpn. Petrol. Inst.

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The oxidative dehydrogenation of ethane (ODHE) over POn/NiO/ZrO2 (High Surface area Zirconia: HSZ) catalyst was carried out with a fix-bed flow reactor at 450 under atmospheric pressure. The ODHE without dilution of reactants with inert gas resulted in ethane conversion of 32.1%, with a high ethene selectivity of 64.2% and an ethene yield of 20.6%. In addition, the catalytic activity did not decrease for at least 12 h. In XPS analysis, Ni species of NiO/HSZ catalyst after the reaction exhibited partly reduced metallic Ni. In contrast, in POn/NiO/ HSZ, Ni species exhibited mostly the NiO form after the reaction. It was found to be important for high ethane conversion and ethene selectivity, the Ni species not to be reduced to metallic Ni during the ODHE reaction. The addition of a small amount of POn to NiO/HSZ catalyst significantly contributed to the resistance to the facile reduction of NiO.

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“…In most of the papers on the catalytic reactions of hydrocarbons with carbon dioxide an observation prevails, that introduction of CO 2 into the feed can decrease significantly (or even suppress) the coke deposition in comparison with the reaction under an inert gas atmosphere [6][7][8][9][10][11][12][13][14][15][16]. It is unquestionable that carbon dioxide is adsorbed on basic centers and after activation on the catalyst surface it can act as a mild oxidant capable to remove the carbonaceous deposit in the Boudouard reaction [17].…”

Section: Introductionmentioning

confidence: 99%

Deactivation of VMgO x Catalysts by Coke in the Process of Isobutane Dehydrogenation with Carbon Dioxide

Ogonowski

Skrzyńska

2007

Catal Lett

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The process of isobutane dehydrogenation in the presence or absence of carbon dioxide was carried out over VMgO x catalysts with different vanadium loading. The performed tests show that both the reaction atmosphere and physicochemical properties of the catalysts (related to vanadium content) have a great influence on the activity decrease and the carbonaceous deposit formation. Despite small ability of carbon dioxide to remove coke in the Boudouard reaction, the amounts of carbonaceous species deposited on the catalysts after the isobutane dehydrogenation under CO 2 atmosphere were even twice greater in comparison to those deposited in helium stream. Moreover, the rate of coke deposition during the dehydrogenation in the inert gas flow was only slightly dependent on the reaction time, in contrast to the process in carbon dioxide atmosphere. The results show that the coke formation on VMgO x is enhanced predominantly by surface acidity of the catalysts, which grows with the vanadium content and the presence of CO 2 in the feed.

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The Role of Chemisorbed Oxygen on Diamond Surfaces for the Dehydrogenation of Ethane in the Presence of Carbon Dioxide

Cited by 67 publications

References 30 publications

Characterizations and Catalytic Properties of Chromium Silicalite-2 Prepared by Direct Hydrothermal Synthesis and Impregnation

Characterizations and Catalytic Properties of Chromium Silicalite-2 Prepared by Direct Hydrothermal Synthesis and Impregnation

Oxidative Dehydrogenation of Ethane over NiO-loaded High Surface Area ZrO<sub>2</sub> Catalysts

Deactivation of VMgO x Catalysts by Coke in the Process of Isobutane Dehydrogenation with Carbon Dioxide

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