Preparation and High Performance of La2O3−V2O5/MCM-41 Catalysts for Ethylbenzene Dehydrogenation in the Presence of CO2

Liu, B. S.; Chang, R. Z.; Jiang, Li; Liu, W.; Au, Chak Tong

doi:10.1021/jp802526z

Cited by 49 publications

(25 citation statements)

References 43 publications

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“…The objective of the present study is to prepare mesoporous silica supported vanadia catalysts with superior catalytic performance. A vanadia catalyst supported on a mesoporous silica such as MCM-41 and SBA-15 exhibited good performance for the dehydrogenation of ethylbenzene with CO2 [20][21][22][23]. Following this observation, in the present work, VOx/SBA-15 catalysts were prepared by using mesoporous SBA-15 as the support.…”

Section: Introductionmentioning

confidence: 77%

Dehydrogenation of Isobutane with Carbon Dioxide over SBA-15-Supported Vanadium Oxide Catalysts

et al. 2016

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A series of vanadia catalysts supported on SBA-15 (V/SBA) with a vanadia (V) content ranging from 1% to 11% were prepared by an incipient wetness method. Their catalytic behavior in the dehydrogenation of isobutane to isobutene with CO 2 was examined. The catalysts were characterized by N 2 adsorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, and temperature-programmed reduction (TPR). It was found that these catalysts were effective for the dehydrogenation reaction, and the catalytic activity is correlated with the amount of dispersed vanadium species on the SBA-15 support. The 7% V/SBA catalyst shows the highest activity, which gives 40.8% isobutane conversion and 84.8% isobutene selectivity. The SBA-15-supported vanadia exhibits higher isobutane conversion and isobutene selectivity than the MCM-41-supported one.

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Section: Introductionmentioning

confidence: 77%

Dehydrogenation of Isobutane with Carbon Dioxide over SBA-15-Supported Vanadium Oxide Catalysts

et al. 2016

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“…1. The pure MCM-41 exhibits strong peaks at 2<theta> = 2.1°due to (1 0 0) reflection lines, three weak signals at 2<theta> = 3.56, 4.08 and 5.4°that correspond to (1 1 0), (2 0 0), and (2 1 0) reflections, indicating the formation of well-ordered hexagonal mesoporous material with space group p6mm [13][14][15]. The X-RD patterns of SZr-MCM41(A-C) also showed typical diffraction peaks at 2<theta> = 2.2, 3.8 and 4.4°, which are slightly higher than the 2<theta> value of pure siliceous MCM-41.…”

Section: X-ray Diffraction (Xrd) Analysismentioning

confidence: 99%

Synthesis and characterization of MCM-41-supported nano zirconia catalysts

Salam

Betiha

Shaban

et al. 2015

Egyptian Journal of Petroleum

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Series of MCM-41 supported sulfated Zirconia (SZ) catalysts with different loadings (2.5-7.5% wt.) were prepared using direct impregnation method. The acquired solid catalysts were characterized structurally and chemically using X-RD, HRTEM, BET, FT-IR, Raman spectroscopy and TPD analysis. The acidity of the solid catalysts was investigated through cumene cracking and isopropanol dehydration at different temperatures. As the SZ loading increases, the surface acidity of the mesoporous catalysts was enhanced, this was reflected by the higher catalytic activity toward cumene cracking and isopropanol dehydration. ª 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of Egyptian Petroleum Research Institute. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

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“…3B, the O 1s peaks of fresh and used LaMeO x /M41 are asymmetrical and the existence of shoulders in the region of low BE should be a result of overlapping of O 1s peaks originated from La 2 O 3 (528.6 eV) [25], CoO (or ZnO, Fe 2 O 3 ) (ca. 530.2 eV) and SiO 2 (532.8 eV) [26]. Based on the XPS results, the higher ratios of La/ Si or Me/Si on the surface than stoichiometric value of sorbents suggested that the active species is highly dispersed in the channels of M41.…”

Section: Xps Resultsmentioning

confidence: 98%