The use of metal electrocatalysts (Cu, Au, and Ag) is the mainstream in primary CO2 reduction systems, but their large overpotential induces a decrease energy conversion efficiency. Recently, it has been discovered that carbon-supported Pt can make game change to reduce CH4 electrocatalytically without overpotential; however, its faradaic efficiency remains only 12.3% thus far. One approach inv...

This study aimed to investigate the kinetics of anion exchange step ferrous ions with Na-X zeolite in a temperature range 20 and 80°C for period up 8 hours. A sulfate heptahydrate solution was used as ion source sodium zeolite. The results showed change physical appearance progress process. catalyst color observed time changed from yellow brown. exchanged contents increased reached 0.519 at aft...

The solvent-free selective hydrogenation of 2-methyl-3-butyn-2-ol (MBY) to 2-methyl-3-buten-2-ol (MBE) was studied over a Pd/ZnO structured catalyst and compared to its behavior in water-assisted conditions. The catalytic behavior was correlated with the surface properties of the catalysts which were characterized by X-ray diffraction and X-ray photoelectron spectroscopy. The catalyst showed hi...

AgxO/Ag/TiO2 photoactive thin films were produced by different modes of magnetron sputtering (namely, DCMS and HiPIMS). The spectral microstructural properties the Ag-AgxO/TiO2 studied Diffuse Reflection Spectroscopy (DRS) X-ray Photoemission (XPS). atomic deposition TiO2 Ag in sputtered film TEM. exhibited fast photocatalytic volatile organic compounds (VOCs) degradation bacterial inactivation...

Endocrine disruptors in water are contaminants of emerging concern due to the potential risks they pose to the environment and to the aquatic ecosystems. In this study, a solar photocatalytic treatment process in a pilot-scale compound parabolic collector (CPC) was used to remove commercial estradiol formulations (17-β estradiol and nomegestrol acetate) from water. Photolysis alone degraded up ...

The hydrodeoxygenation of methyl-substituted phenols was carried out in a flow microreactor at 300 degrees C and 2.85 MPa hydrogen pressure over a sulfided CoMo/Al(2)O(3) catalyst. The primary reaction products were methyl-substituted benzene, cyclohexene, cyclohexane, and H(2)O. Analysis of the results suggests that two independent reaction paths are operative, one leading to aromatics and the...

Wet oxidation of phenol over an Fe/activated carbon catalyst has been studied in a trickle-bed reactor in the following operational window: inlet C phenol=0.5 and 1 g/L, T=100-127 ◦C, PT=3-8 atm, W=0-4.8 g, QL=0.125-2 mL/min and QO2=91.6 NmL/min. The experiments were carried out in the absence of mass transfer limitations. Oxidation and mineralization reactions of phenol are proven to take plac...