Sulphated mesoporous La2O3–ZrO2 composite oxide as an efficient and reusable solid acid catalyst for alkenylation of aromatics with phenylacetylene

Zhao, Zhongkui; Ran, Jinfeng

doi:10.1016/j.apcata.2015.01.023

Cited by 22 publications

(13 citation statements)

References 39 publications

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“…ZrO 2 also exhibited the effect of SMSI , and gained attention for its potential use as a matrix in the material synthesis and the carrier in the catalysis . Moreover, doping other metals such as La, − Ce, Ti, , W, and Fe could affect the structure or electron property of ZrO 2 by forming the defect in the crystal. Especially for rare earth metal oxides, their cationic oxidation states, the degree of coordinative unsaturation, and the degree of surface hydroxylation all contribute to the catalyst modifications. ,, The highly dispersed particles could also be stabilized by rare earth metal oxides .…”

Section: Introductionmentioning

confidence: 99%

Cobalt Nanocluster Supported on ZrRE_nO_x for the Selective Hydrogenation of Biomass Derived Aromatic Aldehydes and Ketones in Water

Wang

et al. 2018

ACS Catal.

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In this study, rare earth (RE) metal doped ZrO2 was prepared by a surfactant-assisted coprecipitation/hydrothermal crystallization method and used to load Co as catalyst for the hydrogenation of aromatic carbonyl compounds in water. Furfural was hydrogenated to furfural alcohol in water with up to 95 mol % yield over Co/ZrLa0.2O x at 40 °C, 2 MPa H2 in 10 h. The doping of rare earth metal oxide has three advantages: (I) it promotes the ZrO2 to reach a small-sized, stable, and high-activity tetragonal phase zirconia and thus lead to a high specific surface area for metal loading; (II) it interacts with Co to reach an ultrasmall average particle size of 1.1 nm; and (III) it modifies the ZrO2 surface to increase the amount of acidic sites for the adsorption of carbonyl feedstock. The adsorption experiment indicated a tight interaction between not only the carrier and CO bond but also the Co clusters and CO bond, which were of benefit for the hydrogenation of carbonyl groups. The surfactant addition during the carrier preparation improves the strong metal–support interactions (SMSI) to promote Co dispersion and stability. Various rare earth metals including La, Pr, Nd, and Ce could modify ZrO2 with a similar mechanism. The as-prepared Co catalyst could also catalyze the selective hydrogenation of various aromatic aldehydes and ketones (such as 5-hydroxymethyl furfural, benzaldehyde, and acetophenone) in water, and 100% yield to corresponding alcohols was achieved. The catalyst remained stable and showed little deactivation during the recycling tests. This study not only presented a high-efficient, low-cost, and stable catalyst for the selective hydrogenation of various aromatic aldehydes and ketones but also give rise to an understanding of rare earth metal oxide doped ZrO2 supported nano Co ternary catalysts.

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Section: Introductionmentioning

confidence: 99%

Cobalt Nanocluster Supported on ZrRE_nO_x for the Selective Hydrogenation of Biomass Derived Aromatic Aldehydes and Ketones in Water

Wang

et al. 2018

ACS Catal.

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“…The presence of sulfate ions is confirmed by a band at 1400 cm −1 [24], [25]. Bounds at 1,074 cm −1 and 1,164 cm −1 attributes to the chelating bidentate SO 4 2− structure [26], which proved acid property of the catalysts.…”

Section: Resultsmentioning

confidence: 99%

Effect of Preparation Parameters on the Catalytic Performance of Solid Acid Catalyst SO₄²⁻/ZrO₂‐CeO₂ in Biodiesel Production▴

Bao

et al. 2021

Fuel Cells

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A new solid acid catalyst SO42−/ZrO2‐CeO2 (SZC) was prepared by co‐precipitation method and used in biodiesel production. Different from considering several parameters in available literatures, the effect of all 10 parameters in the preparation process on the catalytic activities of SZC were studied systematically and comprehensively. The catalytic performance was tested by the conversion of Jatropha oil fatty acids (CFA) in esterification. TG, XRD, BET, TEM, NH3‐TPD, FTIR were used to characterize the catalyst aiming to analyze the influence mechanisms of each factor. The results indicated that the surface area and acidity of sulfated zirconia increased by doping of Ce. The most important preparation parameters included loading amounts of CeO2, aging time, and calcination temperature, their proper values were 5%, 21 h, 773 K, respectively. Moreover, novel findings included: the ammonia concentration influences the acid strength of catalyst which was more important than the amount of acid sites for the catalytic activities and drying before calcination was a necessary step.

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“…[ 24 ] A similar phenomenon was also reported in a previous study incorporating La into ZrO 2 . [ 25 ] The crystallite size of monoclinic ZrO 2 (−111), based on the Scherrer equation, is 16.4 nm. After the sulfonation of ZrO 2 –CeO 2 , the intensity of the tetragonal ZrO 2 peaks increases significantly, indicating the monoclinic to tetragonal transformation in ZrO 2 due to the introduction of sulfur.…”

Section: Resultsmentioning

confidence: 99%

Hydrodeoxygenation of Lignin‐Derived Monomers and Dimers over a Ru Supported Solid Super Acid Catalyst for Cycloalkane Production

Zhang

Yan

Zhu

et al. 2020

Advanced Sustainable Systems

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During the hydrothermal conversion of biomass used for producing chemicals and fuels, lignin mainly remained in the solid residue and accounted for ≈80% of the solid residue. [5] It is estimated that by 2030, the annual production of lignin will increase by 225 million tonnes, since the renewable fuel standard (RFS) program aimed to produce 60 billion gallons of biofuel. [6] Lignin is the only large volume renewable resource that mainly comprises aromatics in nature, [7] thus showing great potential for the production of biofuels and chemicals. However, less than 2% of technical lignin is used to produce chemicals, such as vanillin, dispersants, binders, surfactants, and other high value-added chemicals, while the remaining lignin is used as a low-grade fuel for generating heat and electricity. [2] In recent years, a variety of advanced conversion processes, such as pyrolysis and liquefaction, have been developed for lignin depolymerization to form various monomers and dimers (mainly phenolic derivatives). [1a,8] The lignin-derived monomers and dimers are a complex mixture of oxygenates mainly containing various oxygen-containing functional groups, i.e., C aryl OR, C alkyl OR, and CO bonds. [9] These oxygen-containing functional groups are mainly bonded to aromatic rings and difficult to be removed, resulting in the undesirable properties for transportation fuels, such as low heating values, thermal and chemical instability, strong corrosiveness, high viscosities, and immiscibility with fossil fuels. [10] Therefore, it is necessary to further upgrade lignin-derived monomers and dimers into biofuels (e.g., hydrocarbons and alcohols). Hydrodeoxygenation (HDO) is regarded as the most feasible technology for converting oxygen-rich inferior lignin-derived monomers and dimers into clean oxygen-free hydrocarbons. [8] Generally, the type, position, and number of substituents on the side chains can affect the HDO performances of ligninderived monomers and dimers. Song et al. found that the decreasing order of the C sp2 O bond strength for several phenolics was phenol > catechol > guaiacol, which was mainly due to electron donation from the adjacent substituent (-OH or-OCH 3) or the steric hindrance derived from the second orthosubstituted functional group. [11a] The HDO performances of The monomers and dimers produced via lignin depolymerization are a promising alternative to transportation fuels after hydrodeoxygenation (HDO). However, these compounds contain numerous oxygen-containing functional groups that are strongly bonded to aromatic rings. Therefore, the conventional HDO of lignin-derived compounds faces serious problems of catalyst deactivation due to coke deposition and low hydrocarbon yields. A metal-solid super acid catalyst, i.e., Ru(SO 4 2−)/ZrO 2-CeO 2 , is synthesized, characterized, and evaluated for the HDO of various lignin-derived monomers and dimers in a biphasic n-dodecane/H 2 O system. A high cyclohexane yield of 98.5% is obtained by the HDO of phenol performed at 200 °C and 5 MPa. The "hydrat...

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Sulphated mesoporous La2O3–ZrO2 composite oxide as an efficient and reusable solid acid catalyst for alkenylation of aromatics with phenylacetylene

Cited by 22 publications

References 39 publications

Cobalt Nanocluster Supported on ZrRE_nO_x for the Selective Hydrogenation of Biomass Derived Aromatic Aldehydes and Ketones in Water

Cobalt Nanocluster Supported on ZrRE_nO_x for the Selective Hydrogenation of Biomass Derived Aromatic Aldehydes and Ketones in Water

Effect of Preparation Parameters on the Catalytic Performance of Solid Acid Catalyst SO₄²⁻/ZrO₂‐CeO₂ in Biodiesel Production▴

Hydrodeoxygenation of Lignin‐Derived Monomers and Dimers over a Ru Supported Solid Super Acid Catalyst for Cycloalkane Production

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Sulphated mesoporous La2O3–ZrO2 composite oxide as an efficient and reusable solid acid catalyst for alkenylation of aromatics with phenylacetylene

Cited by 22 publications

References 39 publications

Cobalt Nanocluster Supported on ZrREnOx for the Selective Hydrogenation of Biomass Derived Aromatic Aldehydes and Ketones in Water

Cobalt Nanocluster Supported on ZrREnOx for the Selective Hydrogenation of Biomass Derived Aromatic Aldehydes and Ketones in Water

Effect of Preparation Parameters on the Catalytic Performance of Solid Acid Catalyst SO42−/ZrO2‐CeO2 in Biodiesel Production▴

Hydrodeoxygenation of Lignin‐Derived Monomers and Dimers over a Ru Supported Solid Super Acid Catalyst for Cycloalkane Production

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Cobalt Nanocluster Supported on ZrRE_nO_x for the Selective Hydrogenation of Biomass Derived Aromatic Aldehydes and Ketones in Water

Cobalt Nanocluster Supported on ZrRE_nO_x for the Selective Hydrogenation of Biomass Derived Aromatic Aldehydes and Ketones in Water

Effect of Preparation Parameters on the Catalytic Performance of Solid Acid Catalyst SO₄²⁻/ZrO₂‐CeO₂ in Biodiesel Production▴