Cu-mordenite (Cu-MOR) catalysts with different copper loadings were prepared, characterized and examined in continuous, gas-flow synthesis of methyl acetate (MA) by dimethyl ether (DME) carbonylation. Improved activity selectivity observed for Cu-MOR up to 1 wt% Cu X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR) temperature-programmed reduction hydrogen (H2-TPR) us...

The dynamics of fluids confined in hierarchical porous materials is gaining increasing attention. Here, using pulsed field gradient nuclear magnetic resonance, we report an experimental study the self-diffusivity cyclohexane at different temperatures bi-porous structure faujasite zeolites (i.e., combining intrinsic zeolite microporosity < 2 nm diameter and ordered MCM-41-like mesoporosity 4 dia...

Hierarchical beta zeolites obtained in the concentrated reaction mixtures (H2O/Si = 2.5) and micromesoporous materials synthesized using a dual-template approach from zeolite precursor were rigorously characterized tested sustainable environmentally friendly process of α-pinene oxide isomerization. The highest yield trans-carveol (42%) with chemopreventive activity mammary carcinogenesis was ac...

Macro-mesoporous alumina, calcined at different temperatures (from 400 to 800 °C), were tested in dry reforming of methane reaction under plasma discharge a fixed deposited power (P = 8 W) with ratio CO2/CH4 2. Besides alumina materials, the one possessing lowest surface area (72 m2 g?1) exhibited highest activity: Methane conversion reaches 31.3 % against 23.4, 22.6 and 26.8 for 400, 600 °C, r...

This study was undertaken in the context of Cigéo project to investigate use geopolymer for potential applications high level waste cell. The aim evaluate structural evolution potassium metakaolin based as a function time and temperature geological nuclear disposal applications. mechanical properties, local structure, porosity binder composites stored at 0.5 20 months 90 °C were studied. It sho...

The impact of zeolite hierarchization is often highlighted in terms increased mesopore volume or specific surface area and preservation micropore volume. Yet, although these targets may be achieved, the accessibility to certain micropores might negatively affected during hierarchization. A set hierarchical MCM-22 based materials prepared on desilication treatments MCM-22, layered precursor MCM-...