Simultaneous Catalytic Removal of SOxand NOxwith Hydrotalcite-Derived Mixed Oxides Containing Copper, and Their Possibilities to Be Used in FCC Units

摘要: Abstract Hydrotalcite structures containing copper, magnesium, and aluminumhave been investigated for their potential as precursors ofcatalysts in the decomposition reduction of nitrogen oxides,and simultaneous removal NO SO 2 under conditionssimilar to those found regenerator a fluid catalyticcracking (FCC) unit. It is shown that these catalysts are activefor presence lowconcentrations air by propane inthe up 2% oxygen. The lower oxidation states ofthe copper species (0 +1) active centers thereactions. Under conditions encountered regeneratorof FCC unit, there window oxygen concentration(from 0 1.5%), where Cu-hydrotalcite-based catalyst cansimultaneously remove (by an oxidative and/or reductivereaction) decompositionreaction). When this process takes place at low O concentrations, some copper-sulfur formed. Thesecenters more than originalcopper centers. We have attributed increment activity tothe stabilization stream.