Highly selective catalytic conversion of ethanol to propylene over yttrium-modified zirconia catalyst

Xia, Wei; Wang, Fangfang; Mu, Xichuan; Chen, Kun; Takahashi, Atsushi; Nakamura, Isao; Fujitani, Tadahiro

doi:10.1016/j.catcom.2016.11.011

Cited by 35 publications

(15 citation statements)

References 24 publications

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“…Among them, ZrO 2 has attracted a great deal of attention due to its both acid and base active centers on the surface as well as oxidizing and reducing sites [4]. Moreover, abundant oxygen-containing functional groups, as well as unsaturated Lewis acid-base Zr 4+ -O 2− pairs, make ZrO 2 a widely novel material for ion exchange membranes, oxygen [5] and NO x sensors [6], adsorption and separation [7][8][9][10][11][12][13][14], catalyst and catalyst support [15][16][17], controlled release of pharmaceutical ingredients [18], solar light absorption layer in solar cells [19], and so on. To obtain zirconia nanoceramics, various methods and techniques have been developed and investigated, including sol-gel process, hydrothermal process, and precipitation method.…”

Section: Introductionmentioning

confidence: 99%

Effect of sol-gel processing parameters on structure of zirconia

Silva

Vasconcelos

2019

Cerâmica

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The present study reports the experimental results regarding the effect of molar ratio of hydrolysis water used in the sol-gel synthesis upon the structure of zirconia. The ZrO 2 materials were synthesized via simple metal-chelate route using zirconium n-propoxide [Zr(OCH 2 CH 2 CH 3) 4 ], n-propanol, acetic acid, and deionized water. Thermogravimetric analysis and infrared spectroscopy were performed to evaluate the structural evolution upon samples heating; the complete removal of organic compounds at 330 °C was verified. The results of X-ray diffraction showed that the calcination temperature of 400 °C was enough to the crystallization of the metastable tetragonal zirconia phase. Nitrogen adsorption-desorption measurements indicated that the textural properties of zirconia were affected by the water content used in the synthesis, and the highest surface area was achieved when the water molar ratio of 4 was used.

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Section: Introductionmentioning

confidence: 99%

Effect of sol-gel processing parameters on structure of zirconia

Silva

Vasconcelos

2019

Cerâmica

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“…However, a high dehydration ability of a catalyst inevitably results in the undesirable dehydration of ethanol to ethene. Numerous studies show a significant decrease in the propene selectivity as a result of ethanol dehydration (Hayashi et al 2013;Iwamoto 2015;Iwamoto et al 2013;Xia et al 2017;Wang et al 2018;Pang et al 2019;Xue et al 2017):…”

Section: Introductionmentioning

confidence: 99%

A two-step strategy for the selective conversion of ethanol to propene and hydrogen

Pyatnitsky

Dolgikh

Senchylo

et al. 2021

Preprint

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Simultaneous production of propene and hydrogen from ethanol is the promising way of a renewable feedstock conversion into valuable products. Propene is used for the production of polypropene plastics, acrylonitrile, propene oxide, and many other manufactures; hydrogen is considered the most viable energy carrier for the future. Conventional reaction schemes of the direct one-step catalytic conversion of ethanol into propene include the reaction of the isopropanol dehydration to propene. However, the dehydration ability of a catalyst inevitably gives rise to the ethanol dehydration to ethene that diminishes the propene yield. To avoid ethanol dehydration to ethene, the two-step process is composed of the ethanol conversion to acetone in the first step and the acetone conversion to propene in the second step. The thermodynamic analysis of the known reaction pathways for the ethanol conversion to propene shows that a 74.6% yield of propene can be achieved even at a low temperature of 200oC. According to the literature data, possible catalysts can be Cu/La2Zr2O7 or Fe3O4 for the first step, and the mixed Ag–In/SiO2 and K3PW12O40 catalyst for the second step. We speculate that the propene yield may reach 72% using these catalysts in the two-step process.

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“…Various oxide solids have been found as the ETP catalysts, particularly, Sc2O3-In2O3, Y2O3-CeO2, Y2O3-ZrO2, In2O3-BEA (Hayashi et al 2013;Iwamoto 2015;Iwamoto et al 2013;Xia et al 2017;Wang et al 2018;Pang et al 2019;Xue et al 2017;Matheus et al 2018). The reaction pathway for these catalysts consists of dehydrogenation of ethanol to acetaldehyde, aldol-condensation of acetaldehyde into acetone, conversion of acetone to isopropanol, and dehydration of isopropanol to propene (Iwamoto 2015):…”

Section: Introductionmentioning

confidence: 99%