Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 6, Issue 18, Pages 6953-6964Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cy00946h
Keywords
-
Categories
Funding
- UEFISCDI Romania [5/05.01.2015]
- CNRS France
Ask authors/readers for more resources
Surface-phosphated NiO catalysts with different phosphorus contents were prepared and used for ethane oxidative dehydrogenation (ODH) in the temperature range from 300 to 425 degrees C. The catalysts were characterized by nitrogen adsorption at -196 degrees C, XRD, ICP-OES, XPS, TEM, and Raman spectroscopy. They were also characterized by in situ electrical conductivity measurements at various temperatures and oxygen partial pressures, and the temporal response of the electrical conductivity to sequential exposure to air, an ethane-air mixture (reaction mixture) and pure ethane was recorded under conditions similar to those employed in the catalytic experiments. Adding increasing amounts of phosphorus to NiO changes its physicochemical characteristics; specifically, both the concentration and mobility of the surface lattice O- species in the NiO material decrease considerably, affecting its catalytic performance in ethane ODH. Thus, increasing the P content in NiO leads to a decrease in its catalytic activity with an increase in its ODH selectivity at the expense of total oxidation selectivity in the temperature range studied.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available