In this work, a coaxial dielectric barrier discharge (DBD) reactor was constructed to degrade the mixture of toluene and o-xylene, two typical benzene series. The Cu-MnO2/γ-Al2O3 series catalysts prepared by redox impregnation methods were filled into plasma device VOCs synergistically explore degradation effect. experimental results showed that introduction Cu-doped MnO2 catalyst significantly...

Dimethyl ether (DME) is considered an alternative hydrogen carrier with potential use in fuel cells and automotive domestic applications. hydrolysis to methanol a thermodynamically limited reaction catalyzed by solid-acid catalysts, mainly Al2O3 zeolites. Moreover, it the rate-limiting step of DME steam reforming reaction, which employed for production cell feeding. In present study, performanc...

Four types of nickel catalysts supported on aluminum oxide (Ni/Al2O3) with different nickel loadings were synthesized using the co-precipitation method and were used for the hydrogenation of levulinic acid (LA) to prepare γ-valerolactone (GVL). The synthesized Ni/Al2O3 catalysts exhibited excellent catalytic activity in dioxane, and the activity of the catalysts was excellent even after being u...

We explored the B-C-O system at pressures in the range 0-50 GPa by ab initio variable-composition evolutionary simulations in the hope of discovering new stable superhard materials. A new tetragonal thermodynamically stable phase B4CO4, space group I4[combining macron], and two low-enthalpy metastable compounds (B6C2O5, B2CO2) have been discovered. Computed phonons and elastic constants show th...

In the present study, the reaction kinetics and dynamic modeling of a reactor for syngas transformation into dimethyl ether using a mixture of a metallic oxides (CuO, ZnO, and Al2O3) and an acidic component (γ-Al2O3) as the catalyst has been investigated. A combination of the Graaf kinetic model for methanol synthesis and the Bercic model for methanol dehydration was correlated with the experim...

Aqueous phase reforming of glycerol was studied over a series of γ-Al2O3 supported metal nanoparticle catalysts for hydrogen production in a batch reactor. Of the metals studied, Pt/Al2O3 was found to be the most active catalyst under the conditions tested. A further systematic study on the impact of reaction parameters, including stirring speed, pressure, temperature, and substrate/metal molar...

Herein we investigate the use of CuO-ZnO-Al2O3 (CZA) with different solid acid catalysts (NH4ZSM-5, HZSM-5 or γ-Al2O3) for the production of dimethyl ether from syngas. It was found that of the solid acids, which are necessary for the dehydration function of the admixed system, the CZA/HZSM-5 bifunctional catalyst with a 0.25 acid fraction showed high stability over a continuous period of 212 h...

The oxidation performance of a single-phase Pt-modified aluminide coating was assessed in test at 980 °C comparison with the single crystal superalloy. results suggested that exhibited superior resistance. During oxidation, oxide scale formed on bare alloy changed constantly followed by constitution multi-layer structure: An outer mainly consisted Cr2O3 + NiCr2O4 TiO2 scarce protection, and an ...

A series of samples containing 5-wt% or 20-wt% BaO on γ-Al2O3 with different loadings of Pt were prepared and examined for their NO2 adsorption properties using temperature programmed desorption (TPD), temperature programmed reduction (TPR), and x-ray diffraction (XRD). For calcination at 873 K or above, BaO/Al2O3 formed BaAl2O4. While carbonates were found to be unstable on the aluminate phase...

The microstructures, phase compositions, and high-temperature oxidation behavior of a NiCrAlY coating fabricated by arc ion plating were investigated scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), atomic force microscope (AFM), X-ray diffractometer (XRD). results indicate that the was covered protective Al2O3 scale with excellent resistance after at 1050 °C for 100 h;...