The present study demonstrates that the silica-encapsulated Ni and Ru nanoparticles (nano-Ni@SiO2 and nano-Ru@SiO2) are catalysts more active and stable than the currently known catalysts for the production of COx-free hydrogen through ammonia decomposition.
But it's expensive, so researchers are constantly looking for ways to use less of it by making catalysts more active.
Cu-SSZ-13 SCR catalysts are more active than vanadium-based catalysts at low temperatures, but are more sensitive to deactivation by sulfur.
On the other hand, the NH catalysts were more active than the HE catalysts for C N hydrogenolysis and the 973 K-nitrided catalyst showed a maximum activity for C N hydrogenolysis.
DSC analyses indicated that the crystallinity of these polymers varied as a function of the catalytic activity, the more active catalysts producing polymers with higher crystallinity.
Both copper and manganese mixed oxides catalysts were found to be more active catalysts in many industrial oxidation processes, such as CO oxidation by O2, combustion of toluene, methanol, ethylene, ammonia, NO2 and other combustion reactions [13, 14, 15, 16].
Platinum containing sulfated zirconia is a more active catalyst for hydrocarbon isomerization and cracking than most, if not all, zeolite cracking catalysts.
At lower temperatures, more active catalysts are needed, which are more sensitive to trace impurities and require more efficient gas cleaning; also, a conversion of the reaction heat to power and electricity becomes less efficient.
These catalysts were more active than the alumina-supported catalysts.
Zeolite Y-supported catalysts are more active than ZSM-5-supported catalysts for the stable calcined materials.
