A Highly‐Efficient KF‐Modified Nanorod Support Zr−Ce Oxide Catalyst and its Application

Tang, Hongjuan; Li, Yongfei; Liu, Ning; Fu, Lin; Liu, Yuejin

doi:10.1002/cctc.201801036

Cited by 8 publications

(4 citation statements)

References 61 publications

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“…As can be seen from the XPS spectra of 5 wt.% KF/ZrO 2 (Figure 5), the peaks of 690 eV and 290 eV that, respectively, correspond to the fluorine and potassium are detected, indicating that KF is successfully distributed in the external surface of the support. In the XRD pattern of KF/ZrO 2 , the diffraction peak at 39.5°can be observed, manifesting the formation of the alkaline active species (K 3 Zr 2 F 11 ) by the chemical combination of K + and oxygen species [67]. e results show that KF is immobilized on ZrO 2 which is realized by both physical adsorption and chemical interaction.…”

Section: Catalyst Characterizationmentioning

confidence: 78%

Highly Selective Reduction of Bio-Based Furfural to Furfuryl Alcohol Catalyzed by Supported KF with Polymethylhydrosiloxane (PMHS)

et al. 2020

Journal of Chemistry

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Hydrogenation of bio-based furfural (FUR) to furfuryl alcohol (FFA) is tremendously expanding the application of biomass in many industries such as resins, biofuels, and pharmaceuticals. However, mass manufacture of FFA from FUR is restrained by strict requirements of reaction conditions and expensive catalysts. In this work, an economical and benign catalytic system, containing an easily prepared and reusable catalyst 5 wt.% KF/ZrO2 and a low-cost hydrogen source polymethylhydrosiloxane (PMHS), was developed to be efficient for the hydrogenation of FUR to high-value FFA under mild conditions. The catalyst reactivity was found to be remarkably influenced by the support acid-base properties and KF loading doge. In the presence of 5 wt.% KF/ZrO2, a high FFA yield of 97% and FUR conversion of 99% could be obtained at 25°C in just 0.5 h, which was superior to those attained with other tested catalysts. The KF/ZrO2 catalyst could be recycled at least five times, with the FFA yield slightly decreasing from 97% to 71%. The spare decrease in FFA yield is possibly attributed to the catalyst pore blocking, as clarified by SEM, BET, XPS, and ICP-MS measurements of the fresh and reused catalysts.

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Section: Catalyst Characterizationmentioning

confidence: 78%

Highly Selective Reduction of Bio-Based Furfural to Furfuryl Alcohol Catalyzed by Supported KF with Polymethylhydrosiloxane (PMHS)

et al. 2020

Journal of Chemistry

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“…The ß‐ketoester intermediates reacted with methanol to form diacylglycerol which was then converted to monoglyceride followed by further converted to glycerol. The resulting CH 3 O − recycled to the next catalytic cycle …”

Section: Resultsmentioning

confidence: 99%

Synthesis of Biodiesel from Soybean Oil with Methanol Catalyzed by Ni‐Doped CaO‐MgO Catalysts

et al. 2019

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In order to improve the activity and stability of calcium‐based catalysts, a mixing method with other metal oxides was proposed to increase the interaction among the active ingredients to prevent the active components being leached off. A new Ni/CaO‐MgO catalyst was prepared by a double drop addition co‐precipitation method at alkaline condition around pH 10. The catalyst was characterized by XRD, TG‐TGA, FT‐IR, SEM, TEM, BET and CO2‐TPD. The results showed that Mg2+ had been partly replaced by Ni2+ which coordinated with oxygen octahedron to form strong basic sites at MgO defected lattices. The effect of different Ni addition on the catalytic performance was investigated in the transesterification reaction of renewable bio‐oils to biodiesel. Under the optimal reaction conditions of reaction temperature 120 °C, methanol/oil molar ratio of 27:1, catalyst dosage 5 wt%, the yield of biodiesel reached 97.6% only in 60 minutes of reaction time.

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“…A plausible reaction pathway for the reaction between methanol and oil (fatty acid triglyceride) was proposed (Scheme 1). Te K + and F − ions might embed into the vacancies associated with the loading of KF on the surface of Mg-Ca-Al HTLCs [37] and thus led to the formation of some new species [35], which played the role of alkaline active sites. First, the O 2− and the strong alkaline sites formed in the surface of the catalyst extracted H + from CH 3 OH and formed CH 3 O − [38].…”

Section: Te Infuence Of Reaction Conditions On the Yield Of Famementioning

confidence: 99%

3D Hollow Mg-Ca-Al Hydrotalcite-Like Compounds Doped with KF for Catalytic Transesterification

Yan

Zhang

et al. 2023

International Journal of Chemical Engineering

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Herein, a kind of three-dimensional hollow Mg-Ca-Al hydrotalcite-like compounds (HTLCs) microsphere was prepared by self-assembly of hydrotalcite-like nanosheets. Mg-Ca-Al HTLCs microsphere (MS) has large specific surface area and large pore size, and the modification of KF·2H2O increases numerous alkaline active sites on the surface of the catalyst. The prepared catalyst has excellent catalytic effect for the production of biodiesel by transesterification. Under the optimal conditions of the catalyst addition amount which accounts for 2% of the weight of oil, the biodiesel yield of the best catalyst is as high as 92% within 30 minutes. This article also provides a paradigm of a rational structural design for regulating the morphology of HTLCs.

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A Highly‐Efficient KF‐Modified Nanorod Support Zr−Ce Oxide Catalyst and its Application

Cited by 8 publications

References 61 publications

Highly Selective Reduction of Bio-Based Furfural to Furfuryl Alcohol Catalyzed by Supported KF with Polymethylhydrosiloxane (PMHS)

Highly Selective Reduction of Bio-Based Furfural to Furfuryl Alcohol Catalyzed by Supported KF with Polymethylhydrosiloxane (PMHS)

Synthesis of Biodiesel from Soybean Oil with Methanol Catalyzed by Ni‐Doped CaO‐MgO Catalysts

3D Hollow Mg-Ca-Al Hydrotalcite-Like Compounds Doped with KF for Catalytic Transesterification

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