Catalytic behavior and reaction routes of MEK oxidation over Pd/ZSM-5 and Pd–Ce/ZSM-5 catalysts

Yue, Lin; He, Chi; Zhang, Xinyan; Wang, Zhuo; Wang, Hailin; Hao, Zhengping

doi:10.1016/j.jhazmat.2012.10.048

Cited by 46 publications

(29 citation statements)

References 40 publications

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“…Guillemot et al stated that complete CO2 selectivity for MEK incineration over a 1.0 wt.% Pt/NaX catalyst did not occur and reaction byproducts were probably formed [19]. In our previous work, we also revealed that a great number of unfavorable reaction by-products during MEK destruction were formed [20,21]. In addition, the irregular microstructure of these supports may have unanticipated impacts on the homogeneity of the active sites and the long-term stability of catalysts.…”

Section: Introductionmentioning

confidence: 58%

Insight into the efficient oxidation of methyl-ethyl-ketone over hierarchically micro-mesostructured Pt/K-(Al)SiO2 nanorod catalysts: Structure-activity relationships and mechanism

Jiang

Dummer

et al. 2018

Applied Catalysis B: Environmental

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Hierarchically micro-mesostructured Pt/K-Al-SiO2 catalysts with regular nanorod (Pt/KA-NRS) and spherical nanoflower-like (Pt/KA-SNFS) morphologies were prepared. The existence of Al atoms generates Brønsted acid sites and reduces silanol groups over the supports, promoting the dispersion of Pt nanoparticles and stability of catalysts. Potassium atoms balance the negative charge of supports and enhance O2 mobility. The Pt/KA-NRS catalysts exhibit unexceptionable low temperature activity, CO2 selectivity, and stability for MEK oxidation. Amongst, 0.27 wt.% Pt/KA-NRS completely converts MEK at just 170 °C (activation energy as low as 37.22 kJ• % mol −1), more than 100 °C lower than other typical Pt/Pd supported catalysts reported in the literature. Diacetyl and 2,3-butandiol are the main intermediates during MEK activation, which convert into H2O and CO2 through aldehydes and acids. The excellent catalytic activity of Pt/KA-NRS is ascribed to their regular morphology, high Pt 0 content and dispersion, excellent MEK adsorption capacity and superior O2/CO2 desorption capability under low temperature.

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Section: Introductionmentioning

confidence: 58%

Insight into the efficient oxidation of methyl-ethyl-ketone over hierarchically micro-mesostructured Pt/K-(Al)SiO2 nanorod catalysts: Structure-activity relationships and mechanism

Jiang

Dummer

et al. 2018

Applied Catalysis B: Environmental

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“…For Pd-based catalysts, the dispersion of the active ingredient and the interaction with the support are especially critical for catalytic efficiency [16,17]; therefore, research on the support is very important. In addition, the supports in the Pd material are usually SiO 2 andγ-Al 2 O 3 , but molecular sieves and metal oxides are used as well, including ZSM-5, SBA-15, TiO 2, and CeO 2 , to enhance the dispersion of active sites and aid reactant adsorption [17][18][19][20][21]. Therefore, to some extent, the supports with large specific surface area and strong adsorption will be more helpful to the performance of Pd.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a Series of Pd@UIO-66 by a Double-Solvent Method and Its Catalytic Performance for Toluene Oxidation

et al. 2019

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This paper reports on the preparation, characterization, and catalytic properties of the Pd@UIO-66 for toluene oxidation. The samples are prepared by the double-solvent method to form catalysts with large specific surface area, highly dispersed Pd0 (Elemental palladium) and abundant adsorbed oxygen, which are characterized by X-ray Photoelectron Spectroscopy (XPS), Brunauer-Emmett-Teller (BET) and Transmission Electron Microscopy (TEM). The results show that as the Pd content increases, the adsorbed oxygen content further increases, but at the same time Pd0 will agglomerate and lose some active sites, which will affect its catalytic performance. While 0.2%Pd@UIO-66 has the highest concentration of Pd0, the result shows it has the best catalytic activity and the T90 temperature is 210 °C.

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“…Supported noble metal catalysts exhibit excellent initial activity, as manifested mainly by lower light-off temperatures and minimal differences between the complete combustion temperature and the light-off temperature; that is, their activity increases rapidly with increasing reaction temperature. 29,30 However, noble metals also possess several disadvantages because of their rarity, high cost, and poor toxic tolerance. Therefore, researchers are searching for alternatives to noble metals.…”

Section: Introductionmentioning

confidence: 99%

“…21,27,28,31−35 Rare earth metals (predominantly in the form of oxides) in catalysts play a critical role in the catalytic combustion of industrial organic waste gases and can be added to improve the thermal stability, activity, and reaction half-life of the catalyst. 19,29,34,36−39…”

Section: Introductionmentioning

confidence: 99%

Efficient and Environmentally Friendly Synthesis of AlFe-PILC-Supported MnCe Catalysts for Benzene Combustion

2017

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An efficient and environmentally friendly synthesis of AlFe-pillared clay (AlFe-PILC)-supported MnCe catalysts was explored. Mixed AlFe pillaring agents were prepared by a one-step method using Locron L and ferric nitrate solutions at a high temperature and high pressure. Montmorillonite was treated with the AlFe pillaring agents to synthesize AlFe-PILC. MnO x and CeO 2 with different Mn/Ce atomic ratios were loaded onto the AlFe-PILC support by an impregnation method. The catalysts were characterized using X-ray diffraction, N 2 adsorption, and high-resolution transmission electron microscopy–energy dispersive spectrometry and were tested for the catalytic combustion of benzene and temperature-programmed surface reaction using a microreactor. Compared to conventional methods, this method is simpler and less costly and results in a larger specific surface area, pore volume, and basal spacing, with the ability to control the structure of the catalytic materials. MnCe(6:1)/AlFe-PILC has the highest catalytic activity and can completely degrade benzene (600 ppm in air) at 250 °C. The activity of the catalyst is stable, and no obvious deactivation is observed at 230 °C after 1000 continuous hours. The catalyst is resistant to water and Cl-poisoning. The amount of CeO 2 added is critical to the dispersion of MnO x on the support and the creation of optimum number of oxygen vacancy defect sites for the benzene oxidation reaction. The AlFe-PILC-supported MnCe catalyst is a promising porous material; the support structure, proper dispersion of active species, and addition of Ce are essential for achieving complete degradation of organic toxic chemicals at relatively low temperatures.

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Catalytic behavior and reaction routes of MEK oxidation over Pd/ZSM-5 and Pd–Ce/ZSM-5 catalysts

Cited by 46 publications

References 40 publications

Insight into the efficient oxidation of methyl-ethyl-ketone over hierarchically micro-mesostructured Pt/K-(Al)SiO2 nanorod catalysts: Structure-activity relationships and mechanism

Insight into the efficient oxidation of methyl-ethyl-ketone over hierarchically micro-mesostructured Pt/K-(Al)SiO2 nanorod catalysts: Structure-activity relationships and mechanism

Preparation of a Series of Pd@UIO-66 by a Double-Solvent Method and Its Catalytic Performance for Toluene Oxidation

Efficient and Environmentally Friendly Synthesis of AlFe-PILC-Supported MnCe Catalysts for Benzene Combustion

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