V and V–P containing Zr-SBA-15 catalysts for dehydration of glycerol to acrolein

Cecilia, Juan Antonio; García‐Sancho, Cristina; Mérida‐Robles, J.; Santamaría‐González, J.; Moreno‐Tost, Ramón; Maireles‐Torres, Pedro

doi:10.1016/j.cattod.2014.12.024

Cited by 41 publications

(28 citation statements)

References 60 publications

(76 reference statements)

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“…For HZ@COMS and Ga/HZ@COMS their isotherms both present H2 hystersis loops within the relative pressure P/P 0 range of 0.40-0.75, and such isotherms are of type IV. Such N 2 adsorption and desorption results may suggest the existence of the connective 3D mesopores [13,17,18]. At the same time, the micro-meso hierarchical pore structure was made in the construction of the core-shell structure.…”

Section: Chemical and Physical Properties Of Catalystsmentioning

confidence: 85%

Synthesis of Ga2O3/HZSM-5@cubic ordered mesoporous SiO2 with template Pluronic F127 to improve its catalytic performance in the aromatization of methanol

Shuang

Guo

et al. 2016

J Porous Mater

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Section: Chemical and Physical Properties Of Catalystsmentioning

confidence: 85%

Synthesis of Ga2O3/HZSM-5@cubic ordered mesoporous SiO2 with template Pluronic F127 to improve its catalytic performance in the aromatization of methanol

Shuang

Guo

et al. 2016

J Porous Mater

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“…On the other hand, the interaction between Cr species and silica support is a key factor for the catalytic activity of this system. It has been found that modifying support surfaces with metal oxide enhances the dispersion of the active phases, as well as their interaction with the support [60][61][62][63][64]. Cecilia et al doped SBA-15 silica with zirconium to generate a high number of acid centers that enhance the interaction of active phases, e.g., vanadium/phosphorous with Zr-SBA-15 for the glycerol dehydration reaction [60].…”

Section: Introductionmentioning

confidence: 99%

“…It has been found that modifying support surfaces with metal oxide enhances the dispersion of the active phases, as well as their interaction with the support [60][61][62][63][64]. Cecilia et al doped SBA-15 silica with zirconium to generate a high number of acid centers that enhance the interaction of active phases, e.g., vanadium/phosphorous with Zr-SBA-15 for the glycerol dehydration reaction [60]. SBA-15 mesoporous silica was also modified with either titania or zirconia in order to improve the interaction of molybdenum as active phases for the hydro-desulfurization reaction [61].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Catalytic Evaluation of Chromium Oxide Deposited on Titania–Silica Mesoporous Nanocomposite for the Ethane Dehydrogenation with CO2

et al. 2020

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Ti modification of mesoporous silica support has been reported as an effective way to enhance Cr–Ti–Si interactions that, in turn, impact the catalytic dehydrogenation of ethane with CO2. However, such modification necessitates a repeated, time-consuming and tedious process. In this work, a simple, fast and facile approach has been utilized to synthesize chromium-oxide-loaded titania–silica mesoporous nanocomposites. A series of Cr(y)/Ti(x)–Si mesoporous nanocomposite catalysts with varying Ti and Cr contents were prepared and tested in the dehydrogenation of ethane with carbon dioxide. The as-synthesized catalysts were characterized by XRD, TEM, SEM, BET, UV–Vis–DR, XPS and H2–TPR techniques. The effect of titanium content, as well as chromium loading on the performance of the prepared Cr(y)/Ti(x)–Si catalysts, was investigated. It was found that 2.2 and 8 wt % are the optimum titanium and chromium contents in the synthesized catalysts for obtaining the highest catalytic activity. The superior catalytic performance of the Cr(8)/Ti(2.2)–Si catalyst can be attributed to a higher dispersion of the Cr species, as well as a higher content of the redox Cr species on the surface of the Cr/Ti–Si catalyst. The results showed that the Cr(8)/Ti(2.2)–Si catalyst efficiently dehydrogenated C2H6 in the presence of CO2 giving a 52.3% ethane conversion and 48.0% ethylene yield at 700 °C reaction temperature.

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“…It has been reported previously that the catalysts with higher acid site show good performance in alcohol dehydration (such as ethanol, methanol, butanol, etc.) leading to enhance the catalytic activity [14][15][16]. Therefore, the difference in catalytic behavior of all catalysts upon acidity is discussed further.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Catalytic Dehydration of Ethanol over W/TiO2 Catalysts Having Different Phases of Titania Support

Kerdnoi

Autthanit

Chitpong

et al. 2019

Bull. Chem. React. Eng. Catal.

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This study aims to investigate the catalytic behaviors on W/TiO2 catalysts having different phases of TiO2 towards catalytic dehydration of ethanol to higher value products including ethylene, diethyl ether, and acetaldehyde. In fact, TiO2 support with different crystalline phases can result in differences of physico-chemical properties of the catalyst. Therefore, the present work reports on the catalytic behaviors that were altered with different phases of TiO2 in catalytic ethanol dehydration to diethyl ether or ethylene as a major product. To prepare the catalysts, three different phases [anatase (A), rutile (R), and mixed phases (P25)] of TiO2 supports were impregnated with 10 wt% of tungsten (W). It was found that the W/TiO2-P25 catalyst revealed higher activity among other catalysts. At 300 °C, all catalysts can produce the diethyl ether yield of 24.1%, 22.8%, and 10.6% for W/TiO2-P25, W/TiO2-A, and W/TiO2-R catalysts, respectively. However, when the reaction temperature was increased to 400°C, ethylene is the major product. The W/TiO2-P25 and W/TiO2-A catalysts render the ethylene yield of 60.3% and 46.2%, respectively, whereas only 15.9% is obtained from W/TiO2-R catalyst. The most important parameter influencing their catalytic properties appears to be the proper pore structure, acidity, and distribution of W species. Copyright © 2019 BCREC Group. All rights reserved

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V and V–P containing Zr-SBA-15 catalysts for dehydration of glycerol to acrolein

Cited by 41 publications

References 60 publications

Synthesis of Ga2O3/HZSM-5@cubic ordered mesoporous SiO2 with template Pluronic F127 to improve its catalytic performance in the aromatization of methanol

Synthesis of Ga2O3/HZSM-5@cubic ordered mesoporous SiO2 with template Pluronic F127 to improve its catalytic performance in the aromatization of methanol

Synthesis, Characterization and Catalytic Evaluation of Chromium Oxide Deposited on Titania–Silica Mesoporous Nanocomposite for the Ethane Dehydrogenation with CO2

Catalytic Dehydration of Ethanol over W/TiO2 Catalysts Having Different Phases of Titania Support

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